Journal articles: 'Adhesive nanomaterial'

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Shen, Xinchun, Xiaoqun Mo, Robyn Moore, Shawnalea J. Frazier, Takeo Iwamoto, John M. Tomich, and Xiuzhi Susan Sun. "Adhesion and Structure Properties of Protein Nanomaterials Containing Hydrophobic and Charged Amino Acids." Journal of Nanoscience and Nanotechnology 6, no. 3 (March 1, 2006): 837–44. http://dx.doi.org/10.1166/jnn.2006.126.

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Protein polymers are being used or considered for biobased adhesives and coating materials. Most adhesives derived from macro protein molecules work through receptors or cross-links to bring about adhesion. The adhesion mechanism of protein polymers would lead to better understanding of adhesives and the discovery of new practical properties of protein polymers at both nano- and macro-scales. The objective of this research work was to study adhesion properties of protein polymers at nanoscale (a peptide adhesive with nanometer-scale units that range in size of several nanometers, defined as protein nanomaterial). Seven protein nanomaterial samples with different degrees of adhesive strength were designed and synthesized using solid phase chemistries. All protein nanomaterials contain a common hydrophobic core flanked by charged amino acid sequences. The adhesion properties of the protein nanomaterials were investigated at different pH values and curing temperatures. The protein nanomaterials self aggregate and interact with the wood surface. The protein nanomaterial KKK-FLIVIGSII-KKK identified in this study had high adhesive strength toward wood. It had the highest shear strength at pH 12, with an amino acid sequence that was very hydrophobic and uncharged. This protein nanomaterial underwent structural analyses using circular dichroism, laser-Fourier transform infrared, and laser desorption mass spectrometry. At pH 12 this peptide adopted a pH-induced beta-like conformation. Adhesive strength reflects contributions of both hydrogen bonding and van der Waals interactions. Ionic and covalent bonds do not appear to be significant factors for adhesion in this study.

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Ma, Shi Ning, Nai Shu Zhu, C. Q. Li, and C. H. Hu. "Study on Preparation and Properties of a Room Temperature Fast Curing Epoxy Resin Nano-Adhesive." Key Engineering Materials 373-374 (March 2008): 662–65. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.662.

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A room temperature fast curing epoxy resin nano-adhesive was prepared and modified by nano-SiO2 and liquid rubber CTBN. It shows good shear strength value and heat-durability and also meets the conditions of room temperature and short solidified time. Compared with conventional resin mixing method, adhesive modified by nanomaterial can achieve better heat-durability. Compound cation/nonionic surfactants were used for modifying nano-SiO2 and solution mix method was used for preparation of nano-SiO2 epoxy resin adhesive. The effects of nano-SiO2 to adhesive’s mechanical property and heat-durability were investigated. Adhesive with 2wt% nano-SiO2 shows improved properties which shear strength value is 17.9 MPa and vitrification point is 216.5°C. Micropores and grains of nano-SiO2/liquid rubber CTBN modifying system were observed using scanning electron microscope. Adhesives were investigated using infrared spectroscopy analysis. Nano-SiO2 modified using compound surfactant has higher reacting activity and accelerates the reaction of adhesive. It can be used as catalyst.

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Wuolo-Journey, Karl, Sara BinAhmed, Elise Linna, and Santiago Romero-Vargas Castrillón. "Do graphene oxide nanostructured coatings mitigate bacterial adhesion?" Environmental Science: Nano 6, no. 9 (2019): 2863–75. http://dx.doi.org/10.1039/c9en00499h.

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Graphene oxide (GO) is a biocidal nanomaterial, but is it also anti-adhesive? Here we show that GO-based coatings exhibiting low bacterial adhesion properties can be formed by edge-tethering GO nanosheets to hydrophilic polymer brushes.

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Bandara, Nandika, and Jianping Wu. "Chemically Modified Canola Protein–Nanomaterial Hybrid Adhesive Shows Improved Adhesion and Water Resistance." ACS Sustainable Chemistry & Engineering 6, no. 1 (December 20, 2017): 1152–61. http://dx.doi.org/10.1021/acssuschemeng.7b03457.

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Li, Tong, Adekunle Oloyede, and YuanTong Gu. "Adhesive characteristics of low dimensional carbon nanomaterial on actin." Applied Physics Letters 104, no. 2 (January 13, 2014): 023702. http://dx.doi.org/10.1063/1.4862200.

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Fritz, Consuelo, and Juan Francisco Olivera. "Nanocellulose in Heterogeneous Water-Based Polymerization for Wood Adhesives." Polysaccharides 3, no. 1 (February 15, 2022): 219–35. http://dx.doi.org/10.3390/polysaccharides3010012.

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The interest in the development of biobased adhesives has increased due to environmental concerns. Moreover, as the production of engineered wood products (EWPs) is expected to grow, the wood adhesives market needs to transit toward formaldehyde-free products. Cellulose nanoparticles (CNPs) are a material with unique properties and advantages for producing hybrid materials as biobased wood adhesives. Besides their traditional use as reinforcing additives, CNPs can be incorporated at the beginning of the polymerization reaction to form in situ polymerized hybrid adhesives with better mechanical and physicochemical properties than the neat adhesive. Despite their outstanding characteristics, CNPs are still an emerging nanomaterial in the wood adhesive field, and the studies are incipient. This review explores the utilization of CNPs in heterogeneous polymerization for the production of polyvinyl acetate, polymeric isocyanates, waterborne polyurethane systems, and other waterborne polymer latexes. The main challenges are discussed, and some recommendations are set down for the manufacture of these novel hybrid nanocomposites.

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Saleh, Abeer Abd, Quraish Abbas, Seenaa Ibraheim, Ibrahim Muhammed, Mayes Sameer Hameed, Rukiya Abd Alsahb Lafta, Sarah Gameel Dawood, and Ban Mazan. "Preparation of Nano Titanium Dioxide Using the Sol-Gel Method to Use in Friendly Environment Coatings." Iraqi Journal of Industrial Research 8, no. 2 (October 20, 2021): 21–27. http://dx.doi.org/10.53523/ijoirvol8i2id60.

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In this research, preparation of titanium dioxide nanomaterial (TiO2) using sol-gel method was achieved. 2.5 g weight of the titanium dioxide nanoparticles were added to the local paint using the casting method. Thin films were prepared by drop casting the paint onto the surface of pre-prepared samples, then several tests were carried out including adhesion test, hardness test (Shore B), brightness and whiteness, friction test, contact angle, and antibacterial activity. The nanomaterial at a percentage of 12% showed the best results when it was added to the paint. These results include adhesion strength, hardness strength, and exposing to weather conditions of temperature, and humidity. The adhesive strength increased when adding the nanomaterial from 112 to 139 before exposure to the weather and from 58 to 108 after exposure. The hardness also increased from 77.9 to 86.5 before exposure to the surrounding environment and from 94.2 to 96.8 after exposure. In addition, the paint with TiO2 nanoparticles exhibited antibacterial activity against two types of bacteria Escherichia coli (E. coli), staphylococcus aurous (S. aurous) and antifungal candida. Paint with TiO2 nanoparticles is more efficient as antibacterial agents with E. coli as compared with S. aurous and candida.

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Huang, Yujian, Yongzhong Wang, Leming Sun, Richa Agrawal, and Mingjun Zhang. "Sundew adhesive: a naturally occurring hydrogel." Journal of The Royal Society Interface 12, no. 107 (June 2015): 20150226. http://dx.doi.org/10.1098/rsif.2015.0226.

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Bioadhesives have drawn increasing interest in recent years, owing to their eco-friendly, biocompatible and biodegradable nature. As a typical bioadhesive, sticky exudate observed on the stalked glands of sundew plants aids in the capture of insects and this viscoelastic adhesive has triggered extensive interests in revealing the implied adhesion mechanisms. Despite the significant progress that has been made, the structural traits of the sundew adhesive, especially the morphological characteristics in nanoscale, which may give rise to the viscous and elastic properties of this mucilage, remain unclear. Here, we show that the sundew adhesive is a naturally occurring hydrogel, consisting of nano-network architectures assembled with polysaccharides. The assembly process of the polysaccharides in this hydrogel is proposed to be driven by electrostatic interactions mediated with divalent cations. Negatively charged nanoparticles, with an average diameter of 231.9 ± 14.8 nm, are also obtained from this hydrogel and these nanoparticles are presumed to exert vital roles in the assembly of the nano-networks. Further characterization via atomic force microscopy indicates that the stretching deformation of the sundew adhesive is associated with the flexibility of its fibrous architectures. It is also observed that the adhesion strength of the sundew adhesive is susceptible to low temperatures. Both elasticity and adhesion strength of the sundew adhesive reduce in response to lowering the ambient temperature. The feasibility of applying sundew adhesive for tissue engineering is subsequently explored in this study. Results show that the fibrous scaffolds obtained from sundew adhesive are capable of increasing the adhesion of multiple types of cells, including fibroblast cells and smooth muscle cells, a property that results from the enhanced adsorption of serum proteins. In addition, in light of the weak cytotoxic activity exhibited by these scaffolds towards a variety of mammal cells, evidence is sufficient to propose that sundew adhesive is a promising nanomaterial worth further exploitation in the field of tissue engineering.

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Zhang, Wen, Joseph Hughes, and Yongsheng Chen. "Impacts of Hematite Nanoparticle Exposure on Biomechanical, Adhesive, and Surface Electrical Properties of Escherichia coli Cells." Applied and Environmental Microbiology 78, no. 11 (March 30, 2012): 3905–15. http://dx.doi.org/10.1128/aem.00193-12.

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ABSTRACTDespite a wealth of studies examining the toxicity of engineered nanomaterials, current knowledge on their cytotoxic mechanisms (particularly from a physical perspective) remains limited. In this work, we imaged and quantitatively characterized the biomechanical (hardness and elasticity), adhesive, and surface electrical properties ofEscherichia colicells with and without exposure to hematite nanoparticles (NPs) in an effort to advance our understanding of the cytotoxic impacts of nanomaterials. Both scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed thatE. colicells had noticeable deformation with hematite treatment for 45 min with a statistical significance. The hematite-treated cells became significantly harder or stiffer than untreated ones, as evidenced by indentation and spring constant measurements. The average indentation of the hematite-treatedE. colicells was 120 nm, which is significantly lower (P< 0.01) than that of the untreated cells (approximately 400 nm). The spring constant of hematite-treatedE. colicells (0.28 ± 0.11 nN/nm) was about 20 times higher than that of untreated ones (0.01 ± 0.01 nN/nm). The zeta potential ofE. colicells, measured by dynamic light scattering (DLS), was shown to shift from −4 ± 2 mV to −27 ± 8 mV with progressive surface adsorption of hematite NPs, a finding which is consistent with the local surface potential measured by Kelvin probe force microscopy (KPFM). Overall, the reported findings quantitatively revealed the adverse impacts of nanomaterial exposure on physical properties of bacterial cells and should provide insight into the toxicity mechanisms of nanomaterials.

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Al-Safy, R., R. Al-Mahaidi, and G. P. Simon. "Thermal and Mechanical Characterizations of Nanomaterial-Modified Adhesive Used in Bonding CFRP to Concrete." Journal of Adhesion 87, no. 7-8 (July 2011): 842–57. http://dx.doi.org/10.1080/00218464.2011.597321.

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Sánchez-Romate, Xoan F., Pablo Terán, Silvia G. Prolongo, María Sánchez, and Alejandro Ureña. "Hydrothermal ageing on self-sensing bonded joints with novel carbon nanomaterial reinforced adhesive films." Polymer Degradation and Stability 177 (July 2020): 109170. http://dx.doi.org/10.1016/j.polymdegradstab.2020.109170.

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Baghdadi, Inaam, Belal J. AbuTarboush, Ashraf Zaazou, Hasan Skienhe, Mutlu Özcan, Mirvat Zakhour, and Ziad Salameh. "Investigation of the structure and compressive strength of a bioceramic root canal sealer reinforced with nanomaterials." Journal of Applied Biomaterials & Functional Materials 19 (January 2021): 228080002110147. http://dx.doi.org/10.1177/22808000211014747.

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Objectives: A root canal sealer that can increase the resistance of endodontically treated teeth to compressive strength would be of great advantage. The purpose of this study is to use three different nanoparticles: multi-walled carbon nanotubes (MWCNTs), Titanium carbides (TC), and Boron nitrides (BN) into a bioceramic adhesive root canal sealer; BioRoot™ RCS, in an attempt to improve its structural and compressive strength properties. Methods: Three composites of two weight fractions (1- and 2-wt.%) were produced by mixing each nanomaterial separately with a pre-weighed mass of Bioroot powder. The microstructural properties and compressive strength of the different hardened composites obtained were investigated. The composites have been characterized by X-ray Diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Compression testing was performed. Results: The 1-wt.% composites, Bioroot/MWCNTs, and Bioroot/TC, except for the one reinforced with BN, displayed a significant improvement in the compressive strength compared to pristine BioRoot™ RCS. The 2-wt.% composites showed no significant improvement in the compressive strength. Conclusion: The addition of 1-wt.% MWCNTs and TC nanomaterials can be considered in the future for enhancing the microstructure and compressive strength properties of pristine BioRoot™ RCS.

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Abounahia, Nada, Hazim Qiblawey, and Syed Javaid Zaidi. "Progress for Co-Incorporation of Polydopamine and Nanoparticles for Improving Membranes Performance." Membranes 12, no. 7 (June 30, 2022): 675. http://dx.doi.org/10.3390/membranes12070675.

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Incorporating polydopamine has become a viable method for membrane modification due to its universality and versatility. Fillers in their different categories have been confirmed as effective elements to improve the properties of membranes such as hydrophilicity, permeability, mechanical strength, and fouling resistance. Thus, this paper mainly highlights the recent studies that have been carried out using polydopamine and nanomaterial fillers simultaneously in modifying the performance of different membranes such as ultrafiltration, microfiltration, nanofiltration, reverse osmosis, and forward osmosis membranes according to the various modification methods. Graphene oxide nanoparticles have recently attracted a lot of attention among different nanoparticles used with polydopamine, due to their impressive characteristics impacts on enhancing membrane hydrophilicity, mechanical strength, and fouling resistance. Thus, the incorporation techniques of graphene oxide nanoparticles and polydopamine for enhancing membranes have been highlighted in this work. Moreover, different studies carried out on using polydopamine as a nanofiller for optimizing membrane performance have been discussed. Finally, perspectives, and possible paths of further research on mussel-inspired polydopamine and nanoparticles co-incorporation are stated according to the progress made in this field. It is anticipated that this review would provide benefits for the scientific community in designing a new generation of polymeric membranes for the treatment of different feed water and wastewater based on adhesive mussel inspired polydopamine polymer and nanomaterials combinations.

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Karakashov, Blagoj, Martine Mayne-L’Hermite, and Mathieu Pinault. "Conducting Interface for Efficient Growth of Vertically Aligned Carbon Nanotubes: Towards Nano-Engineered Carbon Composite." Nanomaterials 12, no. 13 (July 4, 2022): 2300. http://dx.doi.org/10.3390/nano12132300.

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Vertically aligned carbon nanotubes (VACNT) are manufactured nanomaterials with excellent properties and great potential for numerous applications. Recently, research has intensified toward achieving VACNT synthesis on different planar and non-planar substrates of various natures, mainly dependent on the user-defined application. Indeed, VACNT growth has to be adjusted and optimized according to the substrate nature and shape to reach the requirements for the application envisaged. To date, different substrates have been decorated with VACNT, involving the use of diffusion barrier layers (DBLs) that are often insulating, such as SiO2 or Al2O3. These commonly used DBLs limit the conducting and other vital physico-chemical properties of the final nanomaterial composite. One interesting route to improve the contact resistance of VACNT on a substrate surface and the deficient composite properties is the development of semi-/conducting interlayers. The present review summarizes different methods and techniques for the deposition of suitable conducting interfaces and controlled growth of VACNT on diverse flat and 3-D fibrous substrates. Apart from exhibiting a catalytic efficiency, the DBL can generate a conducting and adhesive interface involving performance enhancements in VACNT composites. The abilities of different conducting interlayers are compared for VACNT growth and subsequent composite properties. A conducting interface is also emphasized for the synthesis of VACNT on carbonaceous substrates in order to produce cost-effective and high-performance nano-engineered carbon composites.

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Adamenko, Valeriy N., Konstantin P. Golovko, Tatiana N. Suborova, Yana G. Toropova, and Denis A. Zaichikov. "The development and experimental assessment of medical devices protecting eviscerated abdominal organs using the eventration model." Bulletin of the Russian Military Medical Academy 23, no. 3 (November 3, 2021): 165–76. http://dx.doi.org/10.17816/brmma70960.

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On an experimental model of eventration in small and large animals (94 rats and 12 pigs), the safety and effectiveness of samples of aseptic protective dressings made of nanomaterials with impregnations used to prevent the development of complications from abdominal organs and tissues in comparison with control ones gauze medical sterile ones were evaluated. After 3 hours, 3 and 7 days after surgery, the viability of the intestinal wall and the presence of complications were assessed on the basis of laboratory, experimental, instrumental and morphological techniques. The assessment of microcirculation (perfusion) of the intestine was carried out using the apparatus LAKK-02. It was found that according to the complex of clinical and laboratory, microbiological, morphological, microcirculatory data and expert assessment, the safest and most effective for the protection of abdominal organs was an aseptic bandage made of non-woven material spunbond impregnated with vinylin + silicone. The initial values of microcirculation parameters in the pig groups were: 18.4 [17.1; 19] perfusion units in the experimental group and 15.6 [6.8; 17.7] perfusion units in the control group. After applying the bandage in the experimental group, the level of microcirculation did not significantly change. In the control group, after 3-hour exposure to the bandage, a decrease in the level of microcirculation was observed to 6.5 [5.1; 8] perfusion units (p 0.05 compared to the initial and similar stage in the experimental group). Thus, an aseptic bandage made of spunbond nanomaterial impregnated with vinylin + silicone retains the necessary moisture and protects the eventrated abdominal organs, demonstrates safe adhesive properties and prevents the development of local and general complications in the early postoperative period.

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Seong, Minho, Hyun-Ha Park, Insol Hwang, and Hoon Eui Jeong. "Strong and Reversible Adhesion of Interlocked 3D-Microarchitectures." Coatings 9, no. 1 (January 15, 2019): 48. http://dx.doi.org/10.3390/coatings9010048.

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Diverse physical interlocking devices have recently been developed based on one-dimensional (1D), high-aspect-ratio inorganic and organic nanomaterials. Although these 1D nanomaterial-based interlocking devices can provide reliable and repeatable shear adhesion, their adhesion in the normal direction is typically very weak. In addition, the high-aspect-ratio, slender structures are mechanically less durable. In this study, we demonstrate a highly flexible and robust interlocking system that exhibits strong and reversible adhesion based on physical interlocking between three-dimensional (3D) microscale architectures. The 3D microstructures have protruding tips on their cylindrical stems, which enable tight mechanical binding between the microstructures. Based on the unique 3D architectures, the interlocking adhesives exhibit remarkable adhesion strengths in both the normal and shear directions. In addition, their adhesion is highly reversible due to the robust mechanical and structural stability of the microstructures. An analytical model is proposed to explain the measured adhesion behavior, which is in good agreement with the experimental results.

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Lee, Jun Hyup. "Highly Adhesive and Sustainable UV/Heat Dual-Curable Adhesives Embedded with Reactive Core-Shell Polymer Nanoparticles for Super-Narrow Bezel Display." Materials 13, no. 16 (August 7, 2020): 3492. http://dx.doi.org/10.3390/ma13163492.

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To achieve the seamless characteristics of displays, liquid crystal (LC) devices need a super-narrow bezel design. This device architecture can be constructed using functional adhesives that possess excellent physical and chemical properties. In this study, mechanically robust ultraviolet (UV)/heat dual-curable adhesives with outstanding reliability and processability have been fabricated using reactive poly(methyl methacrylate) (PMMA)/polyethyleneimine (PEI) core-shell nanoparticles. Their curing characteristics, narrow drawing processability, adhesive strength, elongation at break, and the contact contamination of LCs have been investigated. Compared to conventional adhesive material, the proposed adhesive containing multifunctional PMMA/PEI nanoparticles afforded a high adhesion strength of 40.2 kgf cm−2 and a high elongation of 64.8% due to the formation of a firm crosslinked network with matrix resins comprising bisphenol A epoxy resin and bisphenol A glycerolate dimethacrylate. Moreover, the proposed adhesive showed an excellent narrow drawing width of 1.2 mm, which is a prerequisite for super-narrow bezel display. With regard to LC contamination, it was found that the level of contamination could be remarkably reduced to 61 µm by a high-temperature curing process. This study makes a significant contribution to the development of advanced display, because it provides robust and sustainable display adhesives based on nanomaterials, thereby enhancing the life and sustained operability of displays.

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Porumb, Anca, Adrian Almasi, Liana Todor, Cristian Adrian Ratiu, Gabriela Ciavoi, Paula Cristina Todor, Sergiu Andrei Todor, Madalina Nicoleta Matei, Cristian Romanec, and Ruxandra Ilinca Matei. "In vitro Study of the Structure and Adhesive Interface in Direct Restorations with Experimental Nanocomposite Materials and Adhesive Systems." Materiale Plastice 55, no. 4 (December 30, 2018): 620–25. http://dx.doi.org/10.37358/mp.18.4.5088.

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Using nanotechnology to produce composite materials it has been possible to obtain materials with similar or better mechanical properties than previous generation of microhybrids, and with exceptional aesthetics and chandelier due to the particularities of nanomaterials. At the same time, the improvement of adhesive techniques to enamel and dentin allowed the expansion of the area of direct composite restorations with a better prognostic over time.Eight carie-free molars were used and each of them was prepared with two class II cavities, which were filled using the C13 and C20 nanocomposites and the A1 and A2 experimental adhesive systems prepared at the Raluca Ripan Chemistry Research Institute. The teeth were divided into four groups of two teeth each, depending on the adhesive system and the composite material used. Scanning electron microscopy images (SEM) have described the adhesive interface and structure characteristics for the two nanocomposite materials and for the two studied adhesive systems.The studied nanocomposites have a variable number of porosities and air bubbles, with a clinical importance which is yet hard to establish.The experimental adhesives used produce a good interface and infiltration of the smear-layer but have not been visualized inside the dentinal canals.In vitro studies are necessary to evaluate the durability of adhesion in the case of self-etch adhesives in one or two steps.

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Wang, Bo, Shuai Yuan, Wei Xin, Yi Chen, Qiwei Fu, Lexiang Li, and Yang Jiao. "Synergic adhesive chemistry-based fabrication of BMP-2 immobilized silk fibroin hydrogel functionalized with hybrid nanomaterial to augment osteogenic differentiation of rBMSCs for bone defect repair." International Journal of Biological Macromolecules 192 (December 2021): 407–16. http://dx.doi.org/10.1016/j.ijbiomac.2021.09.036.

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Liu, Xiaohui, Yiming Yang, Yanqin Lu, Ning Li, Fen Hu, Bolin Zhang, Hao Dai, Haifeng Cai, and Jinyin Yan. "Active nanomaterials containing YAPTAZ reshape tumor immune microenvironment and enhance sensitivity of triple-negative breast cancer to immunotherapy." Materials Express 12, no. 4 (April 1, 2022): 603–8. http://dx.doi.org/10.1166/mex.2022.2188.

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The present study designed a new type of active nanomaterials containing Yes-associated protein and transcriptional coactivator with PDZ-binding motif (YAPTAZ) to investigate its role in tumor immune microenvironment and treatment sensitivity in triple-negative breast cancer (TNBC). Three groups were established in this study, namely; blank control group (saline), YAPTAZ group and YAPTAZ-loaded active nanomaterial group. For in vitro assays, the functional role of active nanomaterials containing YAPTAZ in MDA-MB-231 cell proliferation, apoptosis, migration and invasion was analyzed by MTT assay, flow cytometry, scratch test and Transwell assay, respectively. For in vivo assays, tumor xenotransplantation experiment was performed to observe the effect of active nanomaterials containing YAPTAZ on treatment of TNBC. Administration of active nanomaterials containing YAPTAZ decreased proliferation, invasion and migration of TNBC cells, and promoted apoptosis, thereby enhancing the sensitivity of TNBC cells to treatments. The active nanomaterials were characterized by large surface area, high dispersion, specific adhesion function, tumor affinity and adhesion, when prolonging drug’s circulation time. The findings from our study highlight the potential for targeted active nanomaterials containing YAPTAZ for TNBC treatment, providing a new interventional therapy for TNBC.

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Kaler, Logan, Katherine Joyner, and Gregg A. Duncan. "Machine learning-informed predictions of nanoparticle mobility and fate in the mucus barrier." APL Bioengineering 6, no. 2 (June 1, 2022): 026103. http://dx.doi.org/10.1063/5.0091025.

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Nanomaterial diffusion through mucus is important to basic and applied areas of research such as drug delivery. However, it is often challenging to interpret nanoparticle dynamics within the mucus gel due to its heterogeneous microstructure and biochemistry. In this study, we measured the diffusion of polyethylene glycolylated nanoparticles (NPs) in human airway mucus ex vivo using multiple particle tracking and utilized machine learning to classify diffusive vs sub-diffusive NP movement. Using mathematic models that account for the mode of NP diffusion, we calculate the percentage of NPs that would cross the mucus barrier over time in airway mucus with varied total solids concentration. From this analysis, we predict rapidly diffusing NPs will cross the mucus barrier in a physiological timespan. Although less efficient, sub-diffusive “hopping” motion, a characteristic of a continuous time random walk, may also enable NPs to cross the mucus barrier. However, NPs exhibiting fractional Brownian sub-diffusion would be rapidly removed from the airways via mucociliary clearance. In samples with increased solids concentration (>5% w/v), we predict up to threefold reductions in the number of nanoparticles capable of crossing the mucus barrier. We also apply this approach to explore diffusion and to predict the fate of influenza A virus within human mucus. We predict only a small fraction of influenza virions will cross the mucus barrier presumably due to physical obstruction and adhesive interactions with mucin-associated glycans. These results provide new tools to evaluate the extent of synthetic and viral nanoparticle penetration through mucus in the lung and other tissues.

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Kenig, S., H. Dodiuk, G. Otorgust, and S. Gomid. "Nanocomposite Polymer Adhesives: A Critical Review." Reviews of Adhesion and Adhesives 7, no. 2 (June 1, 2019): 93–168. http://dx.doi.org/10.7569/raa.2019.097306.

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With recent developments in nanotechnology, nanocomposite adhesives offer numerous advantages compared to conventional adhesive materials. Moreover, with the emergence of commercial nanomaterials such as: Nanoclays (NCs), Carbon nanotubes (CNTs), Nanosilica (NS), Polyhedral oligomeric silsesquioxanes (POSS), Tungsten disulfide (WS2) Fullerenes and Nanotubes, and Graphene nanoparticles (GNPs), new potential routes have been opened to tailor adhesives in the nanoscale range. This update will review and analyze the unique fracture mechanisms and the resultant properties of various nanocomposite adhesives based on epoxies, polyurethanes, silicones, polyimides and acrylics containing: NCs, CNTs, NS, POSS, WS2 and GNPs and their current and potential applications.

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So, Christopher R., Elizabeth Yates, Luis Estrella, Ashley Schenck, Catherine Yip, and Kathryn J. Wahl. "Wet Adhesive Nanomaterials Inspired by the Barnacle Adhesive." Biophysical Journal 114, no. 3 (February 2018): 192a—193a. http://dx.doi.org/10.1016/j.bpj.2017.11.1075.

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Kumar, M. S. Senthil, Chithirai Pon Selvan, K. Santhanam, A. Kadirvel, V. Chandraprabu, and L. SampathKumar. "Effect of Nanomaterials on Tribological and Mechanical Properties of Polymer Nanocomposite Materials." Advances in Materials Science and Engineering 2022 (May 31, 2022): 1–16. http://dx.doi.org/10.1155/2022/2165855.

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The good adhesion and interfacial interaction between the nanomaterial and the matrix show that the low content polymer nanocomposite has better tribological and mechanical properties such as strength, modulus, fracture toughness, and fatigue properties. This phenomenon has attracted the attention of many researchers in this field for the past two decades. Nanomaterials are available in many forms, such as nanotubes, nanoclays, nanofibers, nanoparticles, and graphene depending on the shape. This article summarizes the mechanical test results of different nanocomposite materials under various operating conditions. In addition, the current research clearly describes various decisive factors that affect material properties, such as the dispersion of nanoparticles, clay tactoids, processing conditions, agglomeration, and distribution status. The tribological properties and fatigue resistance of nanocomposites are also discussed in this study. In addition, the article also discusses the related issues of incorporating nanomaterials into the matrix.

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De Castro, Denise Tornavoi, Vítor De Baptista Bastos Duarte, Marco Antonio Schiavon, and Andréa Cândido Dos Reis. "Effect of Thermomechanical Fatigue on Shear Strength between a Conventional and an Experimental Polymer for Prosthetic Application." Journal of Health Sciences 21, no. 2 (June 19, 2019): 97. http://dx.doi.org/10.17921/2447-8938.2019v21n2p97-102.

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AbstractThe incorporation of antimicrobial agents may influence the mechanical properties of acrylic resins. Thus, the use of these agents only in regions of dental prostheses subject to greater contamination may be an alternative. This study evaluates the effect of thermomechanical fatigue on the bond strength between a conventional and an experimental acrylic resin incorporated with nanostructured silver vanadate decorated with silver nanoparticles (AgVO3). 60 specimens (Ø13mm x 23mm height) in self-curing resin were obtained and divided into groups according to the experimental resin incorporated with AgVO3 (Ø4mm x 6mm height): G1–Conventional x Conventional, G2–Conventional x 2.5% of AgVO3, G3–Conventional x 5% of AgVO3. Ten samples of each group were subjected to bond strength analysis after manufacture, and 10 were previously submitted to 1.200.000 cycles with 98N load and 2Hz/second frequency and alternating baths of 5 ºC, 37ºC and 55 ºC. The fracture area was analyzed. The data were submitted to analysis of variance of two-factors with Bonferroni adjustment for post hoc comparisons (α=0.05) was used. The fatigue did not affect the bond strength (p=0.416), however, there was influence of the AgVO3 concentration on the bond strength between the resins (p=0.013). Mixed failures with adhesive predominance were observed in samples without AgVO3 and cohesive failures in samples with the nanomaterial. The use of AgVO3 can improve or maintain the bond strength between resins with no thermomechanical fatigue influence. Keywords: Acrylic Resins. Products with Antimicrobial Action. Nanotechnology. Thermomechanical fatigue ResumoA incorporação de agentes antimicrobianos pode influenciar nas propriedades mecânicas de resinas acrílicas. Desta forma, o uso destes agentes apenas em regiões das próteses dentárias sujeitas a maior contaminação pode ser uma alternativa. Este estudo avalia o efeito da fadiga termomecânica na resistência de união entre uma resina acrílica convencional e uma experimental incorporada com vanadato de prata nanoestruturado decorado com nanopartículas de prata (AgVO3). Foram obtidos 60 espécimes (Ø13mm x 23mm de altura) em resina autopolimerizável, divididos em grupos de acordo com a resina experimental incorporada com AgVO3 (Ø4mm x 6mm de altura): G1-Convencional x Convencional, G2-Convencional x 2,5% de AgVO3, G3 -Convencional x 5% de AgVO3. Dez amostras de cada grupo foram submetidas à análise de resistência à união após a confecção e 10 foram submetidas previamente a 1.200.000 ciclos com carga de 98 N e frequência de 2Hz/segundo e banhos alternados de 5 ºC, 37 ºC e 55 ºC. A área de fratura foi analisada. Os dados foram submetidos à análise de variância de dois fatores com ajuste de Bonferroni para comparações pos hoc (α = 0,05). A fadiga não afetou a força de união (p=0,416), no entanto, houve influência da concentração de AgVO3 na resistência de união entre as resinas (p=0,013). Falhas mistas com predominância adesiva foram observadas nas amostras sem AgVO3 e falhas coesivas nas amostras contendo o nanomaterial. O uso de AgVO3 pode melhorar ou manter a resistência da união entre as resinas sem influência da fadiga termomecânica. Palavras-chave: Resinas Acrílicas. Produtos com Ação Antimicrobiana. Nanotecnologia.

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Dufresne, Alain. "Cellulose nanomaterials as green nanoreinforcements for polymer nanocomposites." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376, no. 2112 (December 25, 2017): 20170040. http://dx.doi.org/10.1098/rsta.2017.0040.

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Unexpected and attractive properties can be observed when decreasing the size of a material down to the nanoscale. Cellulose is no exception to the rule. In addition, the highly reactive surface of cellulose resulting from the high density of hydroxyl groups is exacerbated at this scale. Different forms of cellulose nanomaterials, resulting from a top-down deconstruction strategy (cellulose nanocrystals, cellulose nanofibrils) or bottom-up strategy (bacterial cellulose), are potentially useful for a large number of industrial applications. These include the paper and cardboard industry, use as reinforcing filler in polymer nanocomposites, the basis for low-density foams, additives in adhesives and paints, as well as a wide variety of filtration, electronic, food, hygiene, cosmetic and medical products. This paper focuses on the use of cellulose nanomaterials as a filler for the preparation of polymer nanocomposites. Impressive mechanical properties can be obtained for these materials. They obviously depend on the type of nanomaterial used, but the crucial point is the processing technique. The emphasis is on the melt processing of such nanocomposite materials, which has not yet been properly resolved and remains a challenge. This article is part of a discussion meeting issue ‘New horizons for cellulose nanotechnology’.

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Magomedov, Gasan M., Guseyn M. Magomedov, and I. V. Dolbin. "THE STRENGTH OF NANOCOMPOSITES POLYMER / 2D-NANOFILLER WITH ULTRASMALL FILLER CONTENTS." Spravochnik. Inzhenernyi zhurnal, no. 285 (December 2020): 3–6. http://dx.doi.org/10.14489/hb.2020.12.pp.003-006.

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The theoretical model, using the notions of fractal analysis is proposed for description of strength of nanocomposites polymer/2D-nanofiller on the example of nanocomposites polyvinylalcohol/boron nitride. For correct description of strength of these two-phase nanomaterial the knowledge of initial characteristics of matrix polymer (stress of fracture), geometrical parameters of nanofiller and level of interfacial adhesion polymer matrix-nanofiller is necessary. The indicated level, characterizing by shear interfacial strength, was determined theoretically within the framework of fractal conception of adhesion. Its absolute values found high enough – they are comparable with this characteristic in systems polymer-carbon nanotubes and are higher essentially than in systems polymer-microfiber (glassy and carbon fibers). This factor defines high enough strength of the considered nanocomposites. The important factor for fracture process of nanomaterials is aggregation of initial platelets of nanofiller, which forms “packets” (tactoids) of such platelets. The relatively small aggregation degree of nanofiller gives appreciable reduction of strength of nanocomposites polymer/2D-nanofiller. The indicated reduction is connected with transition of 2D-nanofiller structure from exfoliated to intercalated one, i.e. from separate platelets to their tactoids.

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Xu, Deliang, Yang Zhang, Handong Zhou, Yujie Meng, and Siqun Wang. "Characterization of adhesive penetration in wood bond by means of scanning thermal microscopy (SThM)." Holzforschung 70, no. 4 (April 1, 2016): 323–30. http://dx.doi.org/10.1515/hf-2014-0360.

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Abstract The penetration characteristics of phenol formaldehyde (PF) resin, modified by two different nanomaterials (PFmod), has been studied by means of scanning thermal microscopy (SThM). The thermal conductivity (ThC) of the two PFmod was lower than that of the cell wall (CW), but the ThC of both PF resins was basically the same. SThM imaging revealed the penetration of parts of PFmod into the CW by a ThC transitional region, which exists between the CW and the resin. In the transitional zone, the ThC changed obviously in a region about 2 μm in width. This region includes two subregions, one about 0.7 μm and another 1.3 μm in width. The first one is the interface, where PFmod and the CW are in direct contact where the ThC changes rapidly. In the second subregion, the PFmod and CW are in interaction, and ThC changes slowly. Regarding the adhesives’ penetration into the cell lumen, the ThC of the penetrating adhesive was higher than that in the glue line, and this is an indication that SThM is a useful tool to detect the differences of adhesive penetration at the micro-scale level.

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Wang, Shuo, Meng Cao, Hongqian Xue, Fanglin Cong, Xiaodong Li, Changbao Zhao, and Weiguo Su. "Nano-silica reinforced epoxy resin/nano-rubber composite material with a balance of stiffness and toughness." High Performance Polymers 33, no. 6 (January 20, 2021): 685–94. http://dx.doi.org/10.1177/0954008320988752.

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In the electronics and aerospace industries, epoxy resins are generally regarded as economical and efficient adhesives and have a high status. However, epoxy resins are highly crosslinked polymers and are very brittle adhesives where they are prone to fast crack propagation under dynamic loads. Therefore, it is very necessary to enhance the toughness of epoxy resin adhesives. Nano-rubber has been proved to be an important toughening agent for epoxy resin, which can significantly improve the fracture toughness of epoxy resin. However, increasing the toughness of epoxy resin by adding nanomaterials is often accompanied by decreasing the strength and stiffness of resin. Therefore, in this work, rigid nano-silica particles were added to improve the rigidity and tensile strength reduction caused by the addition of rubber particles. And further increase the toughness of the epoxy resin to obtain an epoxy adhesive with balanced stiffness-toughness. As a result, it can be found that the addition of silica particles can significantly improve the decrease in stiffness caused by the addition of rubber particles. For example, Young’s modulus and tensile strength are increased by 28%, and 23%, respectively, with 4% silica is added based on rubber particles. Through the single lap shear experiment, it is found that the shear strength of the epoxy/RnP/silica composite adhesive has increased, which further proves that the addition of nano-silica particles can increase the stiffness of the epoxy composite. The dynamic mechanical analysis experiment found that after adding nano-silica particles, the storage modulus of epoxy composites increased, which also shows that adding nano-silica particles can improve the stiffness of epoxy composites. Scanning electron microscopy analysis was performed to study the reinforcement mechanism of epoxy/RnP/silica composite materials. The thermal stability of epoxy composites was characterized by Dynamic mechanical analysis and thermogravimetric analysis.

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Wesełucha-Birczyńska, Aleksandra, Anna Kołodziej, Małgorzata Świętek, Łukasz Skalniak, Elżbieta Długoń, Maria Pajda, and Marta Błażewicz. "Early Recognition of the PCL/Fibrous Carbon Nanocomposites Interaction with Osteoblast-like Cells by Raman Spectroscopy." Nanomaterials 11, no. 11 (October 28, 2021): 2890. http://dx.doi.org/10.3390/nano11112890.

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Poly(ε-caprolactone) (PCL) is a biocompatible resorbable material, but its use is limited due to the fact that it is characterized by the lack of cell adhesion to its surface. Various chemical and physical methods are described in the literature, as well as modifications with various nanoparticles aimed at giving it such surface properties that would positively affect cell adhesion. Nanomaterials, in the form of membranes, were obtained by the introduction of multi-walled carbon nanotubes (MWCNTs and functionalized nanotubes, MWCNTs-f) as well as electro-spun carbon nanofibers (ESCNFs, and functionalized nanofibers, ESCNFs-f) into a PCL matrix. Their properties were compared with that of reference, unmodified PCL membrane. Human osteoblast-like cell line, U-2 OS (expressing green fluorescent protein, GFP) was seeded on the evaluated nanomaterial membranes at relatively low confluency and cultured in the standard cell culture conditions. The attachment and the growth of the cell populations on the polymer and nanocomposite samples were monitored throughout the first week of culture with fluorescence microscopy. Simultaneously, Raman microspectroscopy was also used to track the dependence of U-2 OS cell development on the type of nanomaterial, and it has proven to be the best method for the early detection of nanomaterial/cell interactions. The differentiation of interactions depending on the type of nanoadditive is indicated by the ν(COC) vibration range, which indicates the interaction with PCL membranes with carbon nanotubes, while it is irrelevant for PCL with carbon nanofibers, for which no changes are observed. The vibration range ω(CH2) indicates the interaction for PCL with carbon nanofibers with seeded cells. The crystallinity of the area ν(C=O) increases for PCL/MWCNTs and for PCL/MWCNTs-f, while it decreases for PCL/ESCNFs and for PCL/ESCNFs-f with seeded cells. The crystallinity of the membranes, which is determined by Raman microspectroscopy, allows for the assessment of polymer structure changes and their degradability caused by the secretion of cell products into the ECM and the differentiation of interactions depending on the carbon nanostructure. The obtained nanocomposite membranes are promising bioactive materials.

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Chen, Hui, Lisha Gu, Binyou Liao, Xuedong Zhou, Lei Cheng, and Biao Ren. "Advances of Anti-Caries Nanomaterials." Molecules 25, no. 21 (October 30, 2020): 5047. http://dx.doi.org/10.3390/molecules25215047.

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Caries is the most common and extensive oral chronic disease. Due to the lack of anti-caries properties, traditional caries filling materials can easily cause secondary caries and lead to treatment failure. Nanomaterials can interfere with the bacteria metabolism, inhibit the formation of biofilm, reduce demineralization, and promote remineralization, which is expected to be an effective strategy for caries management. The nanotechnology in anti-caries materials, especially nano-adhesive and nano-composite resin, has developed fast in recent years. In this review, the antibacterial nanomaterials, remineralization nanomaterials, and nano-drug delivery systems are reviewed. We are aimed to provide a theoretical basis for the future development of anti-caries nanomaterials.

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Ignat, Simona-Rebeca, Andreea Daniela Lazăr, Aida Şelaru, Iuliana Samoilă, George Mihail Vlăsceanu, Mariana Ioniţă, Eugen Radu, Sorina Dinescu, and Marieta Costache. "Versatile Biomaterial Platform Enriched with Graphene Oxide and Carbon Nanotubes for Multiple Tissue Engineering Applications." International Journal of Molecular Sciences 20, no. 16 (August 8, 2019): 3868. http://dx.doi.org/10.3390/ijms20163868.

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Carbon-based nanomaterials, such as graphene oxide (GO) or carbon nanotubes (CNTs) are currently used in various medical applications due to their positive influence on biocompatibility, adhesion, proliferation, and differentiation, as well as their contribution to modulating cell behavior in response to nanomaterial substrates. In this context, in this study, novel flexible membranes based on cellulose acetate (CA) enriched with CNT and GO in different percentages were tested for their versatility to be used as substrates for soft or hard tissue engineering (TE), namely, for their ability to support human adipose-derived stem cells (hASCs) adhesion during adipogenic or osteogenic differentiation. For this purpose, differentiation markers were assessed both at gene and protein levels, while histological staining was performed to show the evolution of the processes in response to CA-CNT-GO substrates. Micro-CT analysis indicated porous morphologies with open and interconnected voids. A slightly lower total porosity was obtained for the samples filled with the highest amount of GO and CNTs, but thicker walls, larger and more uniform pores were obtained, providing beneficial effects on cell behavior and increased mechanical stability. The addition of 1 wt% GO and CNT to the biocomposites enhanced hASCs adhesion and cytoskeleton formation. The evolution of both adipogenic and osteogenic differentiation processes was found to be augmented proportionally to the GO-CNT concentration. In conclusion, CA-CNT-GO biomaterials displayed good properties and versatility as platforms for cell differentiation with potential as future implantable materials in TE applications.

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Lopes, Paulo E., Duarte Moura, Loic Hilliou, Beate Krause, Petra Pötschke, Hugo Figueiredo, Ricardo Alves, Emmanuel Lepleux, Louis Pacheco, and Maria C. Paiva. "Mixed Carbon Nanomaterial/Epoxy Resin for Electrically Conductive Adhesives." Journal of Composites Science 4, no. 3 (August 1, 2020): 105. http://dx.doi.org/10.3390/jcs4030105.

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The increasing complexity of printed circuit boards (PCBs) due to miniaturization, increased the density of electronic components, and demanding thermal management during the assembly triggered the research of innovative solder pastes and electrically conductive adhesives (ECAs). Current commercial ECAs are typically based on epoxy matrices with a high load (>60%) of silver particles, generally in the form of microflakes. The present work reports the production of ECAs based on epoxy/carbon nanomaterials using carbon nanotubes (single and multi-walled) and exfoliated graphite, as well as hybrid compositions, within a range of concentrations. The composites were tested for morphology (dispersion of the conductive nanomaterials), electrical and thermal conductivity, rheological characteristics and deposition on a test PCB. Finally, the ECA’s shelf life was assessed by mixing all the components and conductive nanomaterials, and evaluating the cure of the resin before and after freezing for a time range up to nine months. The ECAs produced could be stored at −18 °C without affecting the cure reaction.

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Bandara, Nandika, Yussef Esparza, and Jianping Wu. "Exfoliating nanomaterials in canola protein derived adhesive improves strength and water resistance." RSC Advances 7, no. 11 (2017): 6743–52. http://dx.doi.org/10.1039/c6ra27470f.

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Purwidyantri, Agnes, Chih-Hsien Hsu, Chia-Ming Yang, Briliant Adhi Prabowo, Ya-Chung Tian, and Chao-Sung Lai. "Plasmonic nanomaterial structuring for SERS enhancement." RSC Advances 9, no. 9 (2019): 4982–92. http://dx.doi.org/10.1039/c8ra10656h.

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Au island over nanospheres (AuIoN) structures featuring a three-dimensional (3D) nanostructure on a two-dimensional (2D) array of nanospheres with different adhesion layers were fabricated as surface-enhanced Raman scattering (SERS) substrates.

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de Oliveira, Rafaela Santos, Nadine Lysyk Funk, Juliana dos Santos, Thayse Viana de Oliveira, Edilene Gadelha de Oliveira, Cesar Liberato Petzhold, Tania Maria Haas Costa, Edilson Valmir Benvenutti, Monique Deon, and Ruy Carlos Ruver Beck. "Bioadhesive 3D-Printed Skin Drug Delivery Polymeric Films: From the Drug Loading in Mesoporous Silica to the Manufacturing Process." Pharmaceutics 15, no. 1 (December 21, 2022): 20. http://dx.doi.org/10.3390/pharmaceutics15010020.

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The alliance between 3D printing and nanomaterials brings versatile properties to pharmaceuticals, but few studies have explored this approach in the development of skin delivery formulations. In this study, clobetasol propionate (CP) was loaded (about 25% w/w) in mesoporous silica nanomaterial (MSN) to formulate novel bioadhesive and hydrophilic skin delivery films composed of pectin (5% w/v) and carboxymethylcellulose (5% w/v) by 3D printing. As a hydrophobic model drug, CP was encapsulated in MSN at a 3:1 (w/w) ratio, resulting in a decrease of CP crystallinity and an increase of its dissolution efficiency after 72 h (65.70 ± 6.52%) as compared to CP dispersion (40.79 ± 4.75%), explained by its partial change to an amorphous form. The CP-loaded MSN was incorporated in an innovative hydrophilic 3D-printable ink composed of carboxymethylcellulose and pectin (1:1, w/w), which showed high tensile strength (3.613 ± 0.38 N, a homogenous drug dose (0.48 ± 0.032 mg/g per film) and complete CP release after 10 h. Moreover, the presence of pectin in the ink increased the skin adhesion of the films (work of adhesion of 782 ± 105 mN·mm). Therefore, the alliance between MSN and the novel printable ink composed of carboxymethylcellulose and pectin represents a new platform for the production of 3D-printed bioadhesive films, opening a new era in the development of skin delivery systems.

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Díez-Pascual, Ana M., and Abbas Rahdar. "Composites of Vegetable Oil-Based Polymers and Carbon Nanomaterials." Macromol 1, no. 4 (December 1, 2021): 276–92. http://dx.doi.org/10.3390/macromol1040019.

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Owed to current environmental concerns and crude oil price fluctuations, the design of feasible substitutes to petroleum-based polymeric materials is a major challenge. A lot of effort has been focused on transforming natural vegetable oils (VOs), which are inexpensive, abundant, and sustainable, into polymeric materials. Different nanofillers have been combined with these bio-based polymer matrices to improve their thermal, mechanical, and antibacterial properties. The development of multifunctional nanocomposites materials facilitates their application in novel areas such as sensors, medical devices, coatings, paints, adhesives, food packaging, and other industrial appliances. In this work, a brief description of current literature on polymeric nanocomposites from vegetable oils reinforced with carbon nanomaterials is provided, in terms of preparation, and properties. Different strategies to improve the nanomaterial state of dispersion within the biopolymer matrix are discussed, and a correlation between structure and properties is given. In particular, the mechanical, thermal, and electrical properties of these natural polymers can be considerably enhanced through the addition of small quantities of single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs), graphene (G), or its derivatives such as graphene oxide (GO) or fullerenes (C60). Finally, some current and potential future applications of these materials in diverse fields are briefly discussed.

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Wu, Ji Wei, Xin Feng Song, Han Wen Sun, Yan Cong Zhang, Xiang Ling Gu, Ping Xuan Dong, Shu Qin Cui, and Chun Hua Fu. "Chitosan Nanocarriers Loading Anti-Tumor Drugs." Journal of Nano Research 32 (May 2015): 113–27. http://dx.doi.org/10.4028/www.scientific.net/jnanor.32.113.

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Chitosan is a kind of natural polymer commonly applied for nanomaterials, which is affluent in nature with favorable biodegradability and biocompatibility and free of toxicity or odor. In clinic it can be used as a drug carrier for the treatment of cancer, and also it is a kind of new pharmaceutical excipient. To prepare chitosan nanomaterial, various method are used, such as ionic crosslinking, covalent crosslinking, precipitation, free radical polymerization, reverse micelle, spray drying, and self-assembly. Furthermore, plenty of anti-tumor drugs, including adriamycin, epirubicin, taxol, 5-fluorouracil, norcantharidin, folic acid, and so on, are also attempted to load on these chitosan nanocarriers. In addition, the mechanism for those nanocarriers carrying anti-tumor drugs acting on tumor cell were explored, and the formulation mainly include electric charge adhesion effect, suppressing the proliferation of tumor cells, adjusting or enhancing immune ability of the body and inducing apoptosis. This paper compared the characteristics of different preparation methods on chitosan as a nanodrug carrier, summarized the types of packaged drugs, analyzed the mechanism of the chitosan as nanodrug carriers. It can provide valuable reference for researchers' further work.

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Zhong, Jian, and Juan Yan. "Seeing is believing: atomic force microscopy imaging for nanomaterial research." RSC Advances 6, no. 2 (2016): 1103–21. http://dx.doi.org/10.1039/c5ra22186b.

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Salesa, Beatriz, Mar Llorens-Gámez, and Ángel Serrano-Aroca. "Study of 1D and 2D Carbon Nanomaterial in Alginate Films." Nanomaterials 10, no. 2 (January 24, 2020): 206. http://dx.doi.org/10.3390/nano10020206.

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Alginate-based materials hold great promise in bioengineering applications such as skin wound healing and scaffolds for tissue engineering. Nevertheless, cell adhesion of mammalian cells on these hydrophilic materials is very poor. In cases such as polycaprolactone, poly(hydroxy-3-butyrate-co-3-valerate) and gelatin, the incorporation of hydrophobic carbon nanofibers (CNFs) and hydrophilic graphene oxide (GO) has shown significant improvement of cell adhesion and proliferation. The incorporation of these carbon nanomaterials (CNMs) into alginate films can enhance their mechanical performance, wettability, water diffusion and antibacterial properties. Herein, we report the effect of adding these CNMs into alginate films on cell adhesion for the first time. Thus, the results of this study showed that these nanocomposites are non-cytotoxic in human keratinocyte HaCaT cells. Nevertheless, contrary to what has been reported for other polymers, cell adhesion on these advanced alginate-based composites was not improved. Therefore, both types of composite films possess similar biological behavior, in terms of cell adhesion and non-cytotoxicity, and enhanced physical and antibacterial properties in comparison to neat alginate for potential biomedical and bioengineering applications.

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Gu, Zonglin, Lin Zhao, Cuicui Ge, Shengtang Liu, Ge Fang, Serena S. Chen, Zaixing Yang, and Ruhong Zhou. "Facet-regulated adhesion of double-stranded DNA on palladium surfaces." Nanoscale 11, no. 4 (2019): 1827–36. http://dx.doi.org/10.1039/c8nr06203j.

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Yoon, Il-Nyoung, Youngsun Lee, Docki Kang, Jungsik Min, Jongok Won, Minyoung Kim, Yong Soo Kang, Sung-ho Kim, and Jeong-Jin Kim. "Modification of hydrogenated Bisphenol A epoxy adhesives using nanomaterials." International Journal of Adhesion and Adhesives 31, no. 2 (March 2011): 119–25. http://dx.doi.org/10.1016/j.ijadhadh.2010.11.010.

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Xu, Zhengwei, Tingting Wang, and Junqiu Liu. "Recent Development of Polydopamine Anti-Bacterial Nanomaterials." International Journal of Molecular Sciences 23, no. 13 (June 30, 2022): 7278. http://dx.doi.org/10.3390/ijms23137278.

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Polydopamine (PDA), as a mussel-inspired material, exhibits numerous favorable performance characteristics, such as a simple preparation process, prominent photothermal transfer efficiency, excellent biocompatibility, outstanding drug binding ability, and strong adhesive properties, showing great potential in the biomedical field. The rapid development of this field in the past few years has engendered substantial progress in PDA antibacterial materials. This review presents recent advances in PDA-based antimicrobial materials, including the preparation methods and antibacterial mechanisms of free-standing PDA materials and PDA-based composite materials. Furthermore, the urgent challenges and future research opportunities for PDA antibacterial materials are discussed.

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Shin, Tae Hwan, Da Yeon Lee, Abdurazak Aman Ketebo, Seungah Lee, Balachandran Manavalan, Shaherin Basith, Chanyoung Ahn, Seong Ho Kang, Sungsu Park, and Gwang Lee. "Silica-Coated Magnetic Nanoparticles Decrease Human Bone Marrow-Derived Mesenchymal Stem Cell Migratory Activity by Reducing Membrane Fluidity and Impairing Focal Adhesion." Nanomaterials 9, no. 10 (October 17, 2019): 1475. http://dx.doi.org/10.3390/nano9101475.

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For stem cell-based therapies, the fate and distribution of stem cells should be traced using non-invasive or histological methods and a nanomaterial-based labelling agent. However, evaluation of the biophysical effects and related biological functions of nanomaterials in stem cells remains challenging. Here, we aimed to investigate the biophysical effects of nanomaterials on stem cells, including those on membrane fluidity, using total internal reflection fluorescence microscopy, and traction force, using micropillars of human bone marrow-derived mesenchymal stem cells (hBM-MSCs) labelled with silica-coated magnetic nanoparticles incorporating rhodamine B isothiocyanate (MNPs@SiO2(RITC)). Furthermore, to evaluate the biological functions related to these biophysical changes, we assessed the cell viability, reactive oxygen species (ROS) generation, intracellular cytoskeleton, and the migratory activity of MNPs@SiO2(RITC)-treated hBM-MSCs. Compared to that in the control, cell viability decreased by 10% and intracellular ROS increased by 2-fold due to the induction of 20% higher peroxidized lipid in hBM-MSCs treated with 1.0 µg/µL MNPs@SiO2(RITC). Membrane fluidity was reduced by MNPs@SiO2(RITC)-induced lipid oxidation in a concentration-dependent manner. In addition, cell shrinkage with abnormal formation of focal adhesions and ~30% decreased total traction force were observed in cells treated with 1.0 µg/µL MNPs@SiO2(RITC) without specific interaction between MNPs@SiO2(RITC) and cytoskeletal proteins. Furthermore, the migratory activity of hBM-MSCs, which was highly related to membrane fluidity and cytoskeletal abnormality, decreased significantly after MNPs@SiO2(RITC) treatment. These observations indicated that the migratory activity of hBM-MSCs was impaired by MNPs@SiO2(RITC) treatment due to changes in stem-cell biophysical properties and related biological functions, highlighting the important mechanisms via which nanoparticles impair migration of hBM-MSCs. Our findings indicate that nanoparticles used for stem cell trafficking or clinical applications should be labelled using optimal nanoparticle concentrations to preserve hBM-MSC migratory activity and ensure successful outcomes following stem cell localisation.

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Kausar, Ayesha, Ishaq Ahmad, M. H. Eisa, and Malik Maaza. "Graphene Nanocomposites in Space Sector—Fundamentals and Advancements." C 9, no. 1 (March 3, 2023): 29. http://dx.doi.org/10.3390/c9010029.

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Graphene is one of the most significant carbon nanomaterials, with a one-atom-thick two-dimensional nanostructure. Like other nanocarbons, graphene has been used as a polymer reinforcement. This review explores the impact of graphene and graphene-based nanocomposites on aerospace applications. The fabrication and indispensable features of graphene-derived nanocomposites have been considered. Numerous polymers and nanocomposites have been employed for aerospace systems such as reinforced thermosetting/thermoplastic polymers and epoxy/graphene nanocomposites. Moreover, graphene-modified carbon-fiber-based composites have been discussed for the space sector. Aerospace nanocomposites with graphene have been investigated for superior processability, structural features, morphology, heat stability, mechanical properties, flame resistance, electrical/thermal conductivity, radiation protection, and adhesion applications. Subsequently, epoxy and graphene-derived nanocomposites have been explored for heat/mechanically stable aerospace engineering structures, radiation-shielding materials, adhesives, coatings, etc.

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OKAMURA, Yosuke. "Fabrication of Polymer Nanosheets and Their Biomedical Applications as Adhesive Nanomaterials." Proceedings of the Conference on Information, Intelligence and Precision Equipment : IIP 2017 (2017): D—00. http://dx.doi.org/10.1299/jsmeiip.2017.d-00.

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Roenbeck, Michael R., Al’ona Furmanchuk, Zhi An, Jeffrey T. Paci, Xiaoding Wei, SonBinh T. Nguyen, George C. Schatz, and Horacio D. Espinosa. "Molecular-Level Engineering of Adhesion in Carbon Nanomaterial Interfaces." Nano Letters 15, no. 7 (June 26, 2015): 4504–16. http://dx.doi.org/10.1021/acs.nanolett.5b01011.

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Thakur, Abhinay, Savaş Kaya, and Ashish Kumar. "Recent Trends in the Characterization and Application Progress of Nano-Modified Coatings in Corrosion Mitigation of Metals and Alloys." Applied Sciences 13, no. 2 (January 4, 2023): 730. http://dx.doi.org/10.3390/app13020730.

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Nanotechnology is a discipline of science and engineering that emphasizes developing, modifying, characterizing, and using nanoscale components in a variety of applications. Owing to their multiple advantages, including adhesion strength, surface hardness, long-term and extra-high-temperature corrosion resistance, improvement of interfacial behavior, etc., nanocoatings are efficiently utilized to minimize the influence of a corrosive environment. Additionally, nanocoatings are often applied in thinner and finer concentrations, allowing for greater versatility in instrumentation and reduced operating and maintenance costs. The exemplary physical coverage of the coated substrate is facilitated by the fine dimensions of nanomaterials and the significant density of their grounded boundaries. For instance, fabricated self-healing eco-sustainable corrosion inhibitors including PAC/CuONPs, PAC/Fe3O4NPs, and PAC/NiONPs, with uniform distributions and particulate sizes of 23, 10, and 43 nm, correspondingly, were effective in producing PAC/MONPs nanocomposites which exhibited IE% of 93.2, 88.1, 96.1, and 98.6% for carbon steel corrosion in 1M HCl at the optimum concentration of 250 ppm. Therefore, in this review, further steps are taken into the exploration of the significant corrosion-mitigation potential and applications of nanomaterial-based corrosion inhibitors and nano-modified coatings, including self-healing nanocoatings, natural source-based nanocoatings, metal/metallic ion-based nanocoatings, and carbon allotrope-based nanocoatings, to generate defensive film and protection against corrosion for several metals and alloys. These have been illuminated through the in-depth discussion on characterization techniques such as scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), etc. After providing a general summary of the various types of nanomaterials and their protective mechanisms in wide corrosive media, we subsequently present a viewpoint on challenges and future directions.

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Kim, Byeonggwan, Jeonghun Kim, Siddulu Naidu Talapaneni, Ajayan Vinu, and Eunkyoung Kim. "Preparation of Conductive Transparent Adhesive Films from Carbon Nanomaterials and Polar Acrylate." Journal of Nanoscience and Nanotechnology 11, no. 7 (July 1, 2011): 6306–11. http://dx.doi.org/10.1166/jnn.2011.4413.

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Chen, Hsieh, Shannon L. Eichmann, and Nancy A. Burnham. "Specific Ion Effects at Calcite Surface Defects Impact Nanomaterial Adhesion." Journal of Physical Chemistry C 124, no. 32 (July 16, 2020): 17648–54. http://dx.doi.org/10.1021/acs.jpcc.0c04468.

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Journal articles on the topic 'Adhesive nanomaterial'

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