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Journal articles on the topic 'Halloysite nanoparticle'

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Author: Grafiati

Published: 9 March 2023

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1

Humayun, Ahmed, Yangyang Luo, Anusha Elumalai, and David K. Mills. "Differential antimicrobial and cellular response of electrolytically metalized halloysite nanotubes having different amounts of surface metallization." Materials Advances 1, no. 6 (2020): 1705–15. http://dx.doi.org/10.1039/d0ma00134a.

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2

Pongsuk, Pattranuch, and Jantrawan Pumchusak. "Effects of Natural Clay on Ionic Conductivity, Crystallinity and Thermal Properties of PEO-LiCF₃SO₃-Natural Clay as Solid Polymer Electrolyte Nanocomposites." Key Engineering Materials 803 (May 2019): 98–103. http://dx.doi.org/10.4028/www.scientific.net/kem.803.98.

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The polymer nanocomposites of PEO-LiCF3SO3 based solid polymer electrolyte were prepared using two kinds of natural clays, which are halloysite nanotube (HNT) and montmorillonite (MMT) nanoparticle. Different contents (0, 1, 5 and 10wt %) of halloysite nanotube (HNT) and montmorillonite (MMT) nanoparticle were explored. Solid polymer electrolyte nanocomposite film was prepared by solution casting method. The ionic conductivity, crystallinity and thermal properties of solid polymer electrolyte membranes were studied by impedance spectroscopy, X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. It was found that HNT provided higher ionic conductivity for solid polymer electrolyte nanocomposite than what MMT did. The highest ionic conductivity at room temperature was found at 5% HNT as 2.068 x 10-5 S.cm-1. The ion-polymer interactions between PEO-LiCF3SO3 and natural clay nanoparticle were investigated by using Fourier transform infrared (FTIR) spectra. The PEO-LiCF3SO3-5%HNT showed good oxidative stability than PEO-LiCF3SO3 composite.

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3

Ding, Xiaoxu, Huixian Wang, Weihang Chen, Jindun Liu, and Yatao Zhang. "Preparation and antibacterial activity of copper nanoparticle/halloysite nanotube nanocomposites via reverse atom transfer radical polymerization." RSC Adv. 4, no. 79 (2014): 41993–96. http://dx.doi.org/10.1039/c4ra03762f.

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Copper nanoparticle supported halloysite nanotubes with a 15 nm lumen and 30 nm external diameterviasurface initiation reverse atom transfer radical polymerization were fabricated and showed good antibacterial activity againstEscherichia coli(E. coli).

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4

Mousa, Mohanad, and Yu Dong. "The Role of Nanoparticle Shapes and Structures in Material Characterisation of Polyvinyl Alcohol (PVA) Bionanocomposite Films." Polymers 12, no. 2 (January 25, 2020): 264. http://dx.doi.org/10.3390/polym12020264.

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Three different types of nanoparticles, 1D Cloisite 30B clay nanoplatelets, 2D halloysite nanotubes (HNTs), and 3D nanobamboo charcoals (NBCs) were employed to investigate the impact of nanoparticle shapes and structures on the material performance of polyvinyl alcohol (PVA) bionanocomposite films in terms of their mechanical and thermal properties, morphological structures, and nanomechanical behaviour. The overall results revealed the superior reinforcement efficiency of NBCs to Cloisite 30B clays and HNTs, owing to their typical porous structures to actively interact with PVA matrices in the combined formation of strong mechanical and hydrogen bondings. Three-dimensional NBCs also achieved better nanoparticle dispersibility when compared with 1D Cloisite 30B clays and 2D HNTs along with higher thermal stability, which was attributed to their larger interfacial regions when characterised for the nanomechanical behaviour of corresponding bionanocomposite films. Our study offers an insightful guidance to the appropriate selection of nanoparticles as effective reinforcements and the further sophisticated design of bionanocomposite materials.

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5

Cao, Hongmei, Xiumei Sun, Yang Zhang, and Nengqin Jia. "Electrochemical sensing based on gold nanoparticle-decorated halloysite nanotube composites." Analytical Biochemistry 430, no. 2 (November 2012): 111–15. http://dx.doi.org/10.1016/j.ab.2012.08.014.

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6

Song, Shaokun, Tingting Zhao, Feng Qiu, Wanting Zhu, Yongren Wu, Yanyun Ju, and Lijie Dong. "RETRACTED: Silver nanoparticle decorated halloysite nanotube for efficient antibacterial application." Chemical Physics 521 (May 2019): 51–54. http://dx.doi.org/10.1016/j.chemphys.2019.01.020.

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7

Philip, Anish, Jenna Lihavainen, Markku Keinänen, and Tuula T. Pakkanen. "Gold nanoparticle-decorated halloysite nanotubes – Selective catalysts for benzyl alcohol oxidation." Applied Clay Science 143 (July 2017): 80–88. http://dx.doi.org/10.1016/j.clay.2017.03.015.

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8

Rawtani, Deepak, Y. K. Agrawal, and Prajesh Prajapati. "Interaction Behavior of DNA with Halloysite Nanotube–Silver Nanoparticle-Based Composite." BioNanoScience 3, no. 1 (January 4, 2013): 73–78. http://dx.doi.org/10.1007/s12668-012-0071-4.

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9

Park, Soojeong, Jisu Choi, Jinwoo Lee, Tianyu Yu, Zixuan Chen, Yunhae Kim, and Changwon Bae. "Influence of nanoparticle dispersibility on hygrothermal properties of HNT-GFRP/BFRP nanocomposites." Modern Physics Letters B 33, no. 14n15 (May 28, 2019): 1940020. http://dx.doi.org/10.1142/s0217984919400207.

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In the nanocomposite, the dispersion and bonding properties of the nanoparticles at the interfaces were major factors that were related to the physical properties of the final product. Nanoparticle aggregation mainly occurs in the dispersion process between nanoparticles and a polymer. In addition, re-aggregation phenomenon generates by large amounts of pores during curing process. In this case, it was necessary to break the physical bonds, such as the attraction between the initial nanoparticles, and achieve a smooth chemical bonding with the polymer. In this study, the effect of halloysite nanotube (HNT) dispersion on the interfacial bonding was compared and analyzed in [Formula: see text] high temperature water environment over 30 days by adding 0.5 wt.% HNT to glass fiber reinforced plastic (GFRP) and basalt fiber reinforced plastic (BFRP). As a result, the HNT contributed to disturbing the moisture absorption rate. It has great effect on thinner lamination part. Moreover, the thicker the lamination, the less the HNT re-aggregation occurred on the curing process. This phenomenon showed a uniform dispersion in the entire laminate area. The weight recovery rate by moisture absorption was high in the HNT-glass fiber (GF), because structural relationship between HNT and GF are larger than in epoxy resin.

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10

Luo, Yangyang, Ahmed Humayun, Teresa A. Murray, Benjamin S. Kemp, Antwine McFarland, Xuan Liu, and David K. Mills. "Cellular Analysis and Chemotherapeutic Potential of a Bi-Functionalized Halloysite Nanotube." Pharmaceutics 12, no. 10 (October 13, 2020): 962. http://dx.doi.org/10.3390/pharmaceutics12100962.

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The surface of halloysite nanotubes (HNTs) was bifunctionalized with two ligands—folic acid and a fluorochrome. In tandem, this combination should selectively target cancer cells and provide a means for imaging the nanoparticle. Modified bi-functionalized HNTs (bi-HNTs) were then doped with the anti-cancer drug methotrexate. bi-HNTs were characterized and subjected to in vitro tests to assess cellular growth and changes in cellular behavior in three cell lines—colon cancer, osteosarcoma, and a pre-osteoblast cell line (MC3T3-E1). Cell viability, proliferation, and cell uptake efficiency were assessed. The bi-HNTs showed cytocompatibility at a wide range of concentrations. Compared with regular-sized HNTs, reduced HNTs (~6 microns) were taken up by cells in more significant amounts, but increased cytotoxicity lead to apoptosis. Multi-photon images confirmed the intracellular location of bi-HNTs, and the method of cell entry was mainly through caveolae-mediated endocytosis. The bi-HNTs showed a high drug loading efficiency with methotrexate and a prolonged period of release. Most importantly, bi-HNTs were designed as a drug carrier to target cancer cells specifically, and imaging data shows that non-cancerous cells were unaffected after exposure to MTX-doped bi-HNTs. All data provide support for our nanoparticle design as a mechanism to selectively target cancer cells and significantly reduce the side-effects caused by off-targeting of anti-cancer drugs.

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11

Rawtani, Deepak, and Y. K. Agrawal. "Study the Interaction of DNA with Halloysite Nanotube-Gold Nanoparticle Based Composite." Journal of Bionanoscience 6, no. 2 (December 1, 2012): 95–98. http://dx.doi.org/10.1166/jbns.2012.1080.

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12

Zhang, Yatao, Yifeng Chen, Haoqin Zhang, Bing Zhang, and Jindun Liu. "Potent antibacterial activity of a novel silver nanoparticle-halloysite nanotube nanocomposite powder." Journal of Inorganic Biochemistry 118 (January 2013): 59–64. http://dx.doi.org/10.1016/j.jinorgbio.2012.07.025.

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13

Omar, Hassan, Glen J. Smales, Sven Henning, Zhi Li, De-Yi Wang, Andreas Schönhals, and Paulina Szymoniak. "Calorimetric and Dielectric Investigations of Epoxy-Based Nanocomposites with Halloysite Nanotubes as Nanofillers." Polymers 13, no. 10 (May 18, 2021): 1634. http://dx.doi.org/10.3390/polym13101634.

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Epoxy nanocomposites are promising materials for industrial applications (i.e., aerospace, marine and automotive industry) due to their extraordinary mechanical and thermal properties. Here, the effect of hollow halloysite nanotubes (HNT) on an epoxy matrix (Ep) was the focus of the study. The structure and molecular mobility of the nanocomposites were investigated using a combination of X-ray scattering, calorimetry (differential (DSC) and fast scanning calorimetry (FSC)) and dielectric spectroscopy. Additionally, the effect of surface modification of HNT (polydopamine (PDA) and Fe(OH)3 nanodots) was considered. For Ep/HNT, the glass transition temperature (Tg) was decreased due to a nanoparticle-related decrease of the crosslinking density. For the modified system, Ep/m-HNT, the surface modification resulted in enhanced filler–matrix interactions leading to higher Tg values than the pure epoxy in some cases. For Ep/m-HNT, the amount of interface formed between the nanoparticles and the matrix ranged from 5% to 15%. Through BDS measurements, localized fluctuations were detected as a β- and γ-relaxation, related to rotational fluctuations of phenyl rings and local reorientations of unreacted components. A combination of calorimetry and dielectric spectroscopy revealed a dynamic and structural heterogeneity of the matrix, as confirmed by two glassy dynamics in both systems, related to regions with different crosslinking densities.

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14

Kim, Yun-Hae, Soo-Jeong Park, Jin-Woo Lee, and Kyung-Man Moon. "A study on the effect of halloysite nanoparticle addition on the strength of glass fiber reinforced plastic." Modern Physics Letters B 29, no. 06n07 (March 20, 2015): 1540003. http://dx.doi.org/10.1142/s0217984915400035.

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Halloysite nanotube, which has been used in the polymer, has been spotlighted as a useful functional materials in the improvement of mechanical properties. In the current study, we established the optimal nanoparticle dispersion and analyzed the mechanical characteristics and the behavior of composites reinforced by HNTs have been synthesized by dispersing HNTs to the unsaturated polyester resin (UPR) and their mechanical characteristics, especially the tensile strength, interlaminar shear strength have been analyzed. Additionally, the reinforcement effect and its variation according to the amount of HNTs was also studied.

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15

Liu, Peng, and Mingfei Zhao. "Silver nanoparticle supported on halloysite nanotubes catalyzed reduction of 4-nitrophenol (4-NP)." Applied Surface Science 255, no. 7 (January 2009): 3989–93. http://dx.doi.org/10.1016/j.apsusc.2008.10.094.

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16

Pebdani, Mohammadreza Heidari, and Ronald E. Miller. "Molecular dynamics simulation of pull-out Halloysite nanotube from polyurethane matrix." Advances in Mechanical Engineering 13, no. 9 (September 2021): 168781402110446. http://dx.doi.org/10.1177/16878140211044663.

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Molecular dynamics (MD) simulation has been applied to study of pull-out of Halloysite nanotubes (HNTs) from a polyurethane (PU) matrix. First, the Machine learning (ML) particle swarm optimization (PSO) method was used to obtain force field parameters for MD from data of density functional theory (DFT) calculations. The current study shows the possibility of using a PSO technique to modify the force field with DFT data with less than 5 kcal/mol discrepancy. Second, we considered the influence of atomic interface on pulling out of HNT from PU. Energy variation has been proposed as the cohesion strength between matrix and nanoparticle. In addition, the best Lennard Jones parameters in the MD simulation make good agreement with an experimental sample stress-strain response.

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17

Same, Saeideh, Jamileh Kadkhoda, Golnaz Navidi, Fatemeh Abedi, Marziyeh Aghazadeh, Morteza Milani, Abolfazl Akbarzadeh, and Soodabeh Davaran. "The fabrication of halloysite nanotube-based multicomponent hydrogel scaffolds for bone healing." Journal of Applied Biomaterials & Functional Materials 20 (January 2022): 228080002211118. http://dx.doi.org/10.1177/22808000221111875.

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Bone tissue engineering, as an alternative for common available therapeutic approaches, has been developed to focus on reconstructing of the missing tissues and restoring their functionality. In this work, three-dimensional (3D) nanocomposite scaffolds of polycaprolactone-polyethylene glycol-polycaprolactone/gelatin (PCEC/Gel) were prepared by freeze-drying method. Biocompatible nanohydroxyapatite (nHA), iron oxide nanoparticle (Fe3O4) and halloysite nanotube (HNT) powders were added to the polymer matrix aiming to combine the osteogenic activity of nHA or Fe3O4 with high mechanical strength of HNT. The scanning electron microscope (SEM) methods was utilized to characterize the nanotube morphology of HNT as well as nanoparticles of Fe3O4 and nHA. Prepared scaffolds were characterized via Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), and SEM methods. In addition, the physical behavior of scaffolds was evaluated to explore the influence of HNT on the physicochemical properties of composites. Cell viability and attachment were investigated by MTT (3-(4,5-dimethylthiazol-2-yl)−2,5-diphenyl-2H-tetrazolium bromide) assay and SEM on human dental pulp-derived mesenchymal stem cells (h-DPSCs) in-vitro. Cell proliferation was observed without any cytotoxicity effect on h-DPSCs for all examined scaffolds. Alizarin red (ARS) and alkaline phosphatase (ALP) staining were carried out to determine the osteoconductivity of scaffolds. The data demonstrated that all PCEC/Gel/HNT hydrogel scaffolds supported osteoblast differentiation of hDPSCs with moderate effects on cell proliferation. Moreover, PCEC/Gel/HNT/nHA with proper mechanical strength showed better biological activity compared to PCEC/Gel/HNT/Fe3O4 and PCEC/Gel/HNT scaffolds. Therefore, this study suggested that with proper fillers content, PCEC/Gel/HNT nanocomposite hydrogels alone or in a complex with nHA, Fe3O4 could be a suitable candidate for hard tissue regeneration.

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18

Cherednichenko, Y. V., V. G. Evtugyn, L. R. Nigamatzyanova, F. S. Akhatova, E. V. Rozhina, and R. F. Fakhrullin. "SILVER NANOPARTICLE SYNTHESIS USING ULTRASOUND AND HALLOYSITE TO CREATE A NANOCOMPOSITE WITH ANTIBACTERIAL PROPERTIES." Nanotechnologies in Russia 14, no. 9-10 (September 2019): 456–61. http://dx.doi.org/10.1134/s1995078019050021.

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19

Tsoufis, T., F. Katsaros, B. J. Kooi, E. Bletsa, S. Papageorgiou, Y. Deligiannakis, and I. Panagiotopoulos. "Halloysite nanotube-magnetic iron oxide nanoparticle hybrids for the rapid catalytic decomposition of pentachlorophenol." Chemical Engineering Journal 313 (April 2017): 466–74. http://dx.doi.org/10.1016/j.cej.2016.12.056.

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20

Li, Han, Jisheng Yang, Xiaoqiong Feng, and Zhiyong Qin. "Cellulose Nanofiber-Assisted Dispersion of Halloysite Nanotubes via Silane Coupling Agent-Reinforced Starch–PVA Biodegradable Composite Membrane." Membranes 12, no. 2 (January 30, 2022): 169. http://dx.doi.org/10.3390/membranes12020169.

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HNTs (halloysite nanotubes) are widely used in reinforcing material, often used in material reinforcement and particle loading. However, their easy agglomeration causes them to have great limitations in application. In this work, two kinds of silane coupling agents (KH560 and KH570) were introduced to graft the CNF/HNT (cellulose nanofiber) nanoparticles used to reinforce the starch-polyvinyl alcohol (PVA) composite membranes. The mechanical properties, water resistance properties and thermal performance of the composite membrane were tested. The results showed that the CNF/HNTs nanoparticle system modified by two silane coupling agents enhanced the tensile strength (TS) of the starch–PVA composite membranes by increments of 60.11% and 68.35%, and, in addition, the water resistance of starch–PVA composite membrane improved. The introduction of chemical bonds formed associations and a compact network structure, which increased the thermal stability and the crystallinity of the starch–PVA composite membrane. In the study, we creatively used CNF to disperse HNTs. CNF and HNTs were combined under the action of the silane coupling agent, and then mixed into the starch–PVA membranes matrix to prepare high-performance degradable biological composite membranes.

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21

Xu, Jun, Beibei Zhang, Lei Jia, Ning Bi, and Tongqian Zhao. "Metal-enhanced fluorescence detection and degradation of tetracycline by silver nanoparticle-encapsulated halloysite nano-lumen." Journal of Hazardous Materials 386 (March 2020): 121630. http://dx.doi.org/10.1016/j.jhazmat.2019.121630.

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22

Song, Shaokun, Tingting Zhao, Feng Qiu, Wanting Zhu, Yongren Wu, Yanyun Ju, and Lijie Dong. "Retraction notice to “Silver nanoparticle decorated halloysite nanotube for efficient antibacterial application” [CHEMPHYS 521 (2019) 51–54]." Chemical Physics 530 (February 2020): 110586. http://dx.doi.org/10.1016/j.chemphys.2019.110586.

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23

Wang, Kui, Xuefei Jin, Xiuhong He, Weijiang Huang, Qin Tian, Qiuping Fu, and Wei Yan. "Synthesis of Aluminum Phosphate-Coated Halloysite Nanotubes: Effects on Morphological, Mechanical, and Rheological Properties of PEO/PBAT Blends." Nanomaterials 12, no. 17 (August 23, 2022): 2896. http://dx.doi.org/10.3390/nano12172896.

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Polymer blending has been widely used to fabricate polymeric films in the last decade due to its superior properties to a single component. In this study, an aluminum phosphate-coated halloysite nanotube (HNTs@AlPO4) was fabricated using a one-pot heterogeneous precipitation method, organically modified HNTs@AlPO4 (o-HNTs@AlPO4) was used to improve the performance of polyethylene oxide/poly(butylene adipate-co-terephthalate) (PEO/PBAT) blends, and the mechanical and rheological properties of the PEO/PBAT/o-HNTs@AlPO4 films were systematically discussed. According to our results, there is an optimal addition for adequate AlPO4 nanoparticle dispersion and coating on the surface of HNTs, and organic modification could improve the interfacial compatibility of HNTs@AlPO4 and the polymeric matrix. Moreover, o-HNTs@AlPO4 may serve as a compatibilizer between PEO and PBAT, and PEO/PBAT/o-HNTs@AlPO4 films have better mechanical and rheological properties than the PEO/PBAT blends without the o-HNTs@AlPO4 component.

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24

Wan Ikhsan, Syarifah Nazirah, Norhaniza Yusof, Farhana Aziz, Nurasyikin Misdan, Ahmad Fauzi Ismail, Woei-Jye Lau, Juhana Jaafar, Wan Norharyati Wan Salleh, and Nur Hanis Hayati Hairom. "Efficient separation of oily wastewater using polyethersulfone mixed matrix membrane incorporated with halloysite nanotube-hydrous ferric oxide nanoparticle." Separation and Purification Technology 199 (June 2018): 161–69. http://dx.doi.org/10.1016/j.seppur.2018.01.028.

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25

Zhang, Mengmeng, Yamin Cheng, Zhiwei Li, Xiaohong Li, Laigui Yu, and Zhijun Zhang. "Biomass Chitosan-Induced Fe3O4 Functionalized Halloysite Nanotube Composites: Preparation, Characterization and Flame-Retardant Performance." Nano 14, no. 12 (December 2019): 1950154. http://dx.doi.org/10.1142/s1793292019501546.

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An inorganic–organic nanohybrid flame retardant, HNT@CS@Fe3O4, is prepared by Halloysite nanotubes (HNT) as nanotemplate, chitosan (CS) as char-forming agent and ferroferric oxide (Fe3O[Formula: see text] playing in a catalytic role, aiming to endow enhanced flame-retardant performance of its nanohybrid. Results show that HNT@CS@Fe3O4 nanohybrids have a corn-like structure and can significantly improve the flame retardancy and thermal stability of epoxy resin (EP). Especially, the initial thermal degradation temperature of EP/HNT@CS@Fe3O4 is significantly improved by [Formula: see text]C relative to pure EP, and the residual carbon yield under air atmosphere is 8.8[Formula: see text]wt.%, which is significantly higher than other EP composites, indicating a higher thermal stability is offered by the as-prepared nanohybrid. The limiting oxygen index of EP/10HNT@CS@Fe3O4 is 31.3%, which is 10.2% higher than that of pure EP. Meanwhile, the HNT@CS@Fe3O4 nanofiller reduces the peak heat release rate, CO production and peak smoke production release of EP nanocomposite by 32.0%, 44.0% and 33.0% in a cone calorimeter test, respectively. This is because the HNT-based composite can form a three-dimensional network structure into the EP matrix to inhibit heat release and diffusion of flammable moieties upon burning of EP. In the meantime, the incorporated Fe3O4 nanoparticle can in situ catalyze the charring of CS and EP matrix on the surface of HNT during the combustion process, which also contributes to the significantly increased fire safety of EP.

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26

Ren, Tingting, Gongwen Tang, Biao Yuan, Yang Yang, Zhishan Yan, Linrong Ma, and Xin Huang. "Hexadecyltrimethoxysilane-Modified SiO2 Nanoparticle-Coated Halloysite Nanotubes Embedded in Silicone–Acrylic Polymer Films as Durable Fluorine-Free Superhydrophobic Coatings." ACS Applied Nano Materials 3, no. 6 (June 3, 2020): 5807–15. http://dx.doi.org/10.1021/acsanm.0c00967.

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27

González-Rivera, José, Alessio Spepi, Carlo Ferrari, Jorge Tovar-Rodriguez, Elvira Fantechi, Francesco Pineider, Marco Antonio Vera-Ramírez, Maria Rosaria Tiné, and Celia Duce. "Magnetothermally-responsive nanocarriers using confined phosphorylated halloysite nanoreactor for in situ iron oxide nanoparticle synthesis: A MW-assisted solvothermal approach." Colloids and Surfaces A: Physicochemical and Engineering Aspects 635 (February 2022): 128116. http://dx.doi.org/10.1016/j.colsurfa.2021.128116.

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28

Wadi, Valéry Tusambila, Özkan Özmen, Abdullah Caliskan, and Mehmet Baki Karamış. "Experimental study and computational intelligence on dynamic viscosity and thermal conductivity of HNTs based nanolubricant." Industrial Lubrication and Tribology 74, no. 1 (January 3, 2022): 102–10. http://dx.doi.org/10.1108/ilt-05-2021-0193.

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Purpose This paper aims to evaluate the dynamic viscosity and thermal conductivity of halloysite nanotubes (HNTs) suspended in SAE 5W40 using machine learning methods (MLMs). Design/methodology/approach A two-step method with surfactant was selected to prepare nanolubricants in concentrations of 0.025, 0.05, 0.1 and 0.5 wt%. Thermal conductivity and dynamic viscosity of nanofluids were ascertained over the temperature range of 25–70 °C, with an increment step of 5 °C, using a KD2-Pro analyser device and a digital viscometer MRC VIS-8. Additionally, four different MLMs, including Gaussian process regression (GPR), artificial neural network (ANN), support vector machine (SVM) and decision tree (DT), were used for predicting dynamic viscosity and thermal conductivity by using nanoparticle concentration and temperature as input parameters. Findings According to the achieved results, the dynamic viscosity and thermal conductivity of nanolubricants mostly increased with the rise of nanoparticle concentration in the base oil. All the proposed models, especially GPR with root mean square error mean values of 0.0047 for dynamic viscosity and 0.0016 for thermal conductivity, basically showed superior ability and stability to estimate the viscosity and thermal conductivity of nanolubricants. Practical implications The results of this paper could contribute to optimising the cost and time required for modelling the thermophysical properties of lubricants. Originality/value To the best of the author’s knowledge, in this available literature, there is no paper dealing with experimental study and prediction of dynamic viscosity and thermal conductivity of HNTs-based nanolubricant using GPR, ANN, SVM and DT.

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29

Wan Ikhsan, Syarifah Nazirah Wan, Norhaniza Yusof, Farhana Aziz, Ahmad Fauzi Ismail, Norazanita Shamsuddin, Juhana Jaafar, Wan Norharyati Wan Wan Salleh, Pei Sean Goh, Woei Jye Lau, and Nurasyikin Misdan. "Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology." Nanomaterials 12, no. 20 (October 19, 2022): 3673. http://dx.doi.org/10.3390/nano12203673.

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In this current study, facile, one-pot synthesis of functionalised nanocomposite coating with simultaneous hydrophilic and oleophobic properties was successfully achieved via the sol–gel technique. The synthesis of this nanocomposite coating aims to develop a highly efficient, simultaneously oleophobic-hydrophilic coating intended for polymer membranes to spontaneously separate oil-in-water emulsions, therefore, mitigating the fouling issue posed by an unmodified polymer membrane. The simultaneous hydrophilicity-oleophobicity of the nanocoating can be applied onto an existing membrane to improve their capability to spontaneously separate oil-in-water substances in the treatment of oily wastewater using little to no energy and being environmentally friendly. The synthesis of hybrid chitosan–silica (CTS-Si)/halloysite nanotube (HNT) nanocomposite coating using the sol–gel method was presented, and the resultant coating was characterised using FTIR, XPS, XRD, NMR, BET, Zeta Potential, and TGA. The wettability of the nanocomposite coating was evaluated in terms of water and oil contact angle, in which it was coated onto a polymer substrate. The coating was optimised in terms of oil and water contact angle using Response Surface Modification (RSM) with Central Composite Design (CCD) theory. The XPS results revealed the successful grafting of organosilanes groups of HNT onto the CTS-Si denoted by a wide band between 102.6–103.7 eV at Si2p. FTIR spectrum presented significant peaks at 3621 cm−1; 1013 cm−1 was attributed to chitosan, and 787 cm−1 signified the stretching of Si-O-Si on HNT. 29Si, 27Al, and 13H NMR spectroscopy confirmed the extensive modification of the particle’s shells with chitosan–silica hybrid covalently linked to the halloysite nanotube domains. The morphological analysis via FESEM resulted in the surface morphology that indicates improved wettability of the nanocomposite. The resultant colloids have a high colloid stability of 19.3 mV and electrophoretic mobility of 0.1904 µmcm/Vs. The coating recorded high hydrophilicity with amplified oleophobic properties depicted by a low water contact angle (WCA) of 11° and high oil contact angle (OCA) of 171.3°. The optimisation results via RSM suggested that the optimised sol pH and nanoparticle loadings were pH 7.0 and 1.05 wt%, respectively, yielding 95% desirability for high oil contact angle and low water contact angle.

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30

Wei, Tong, Kailong Jin, and John M. Torkelson. "Isolating the effect of polymer-grafted nanoparticle interactions with matrix polymer from dispersion on composite property enhancement: The example of polypropylene/halloysite nanocomposites." Polymer 176 (August 2019): 38–50. http://dx.doi.org/10.1016/j.polymer.2019.05.038.

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31

Das, Sankar, and Subhra Jana. "A facile approach to fabricate halloysite/metal nanocomposites with preformed and in situ synthesized metal nanoparticles: a comparative study of their enhanced catalytic activity." Dalton Transactions 44, no. 19 (2015): 8906–16. http://dx.doi.org/10.1039/c5dt00830a.

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Halloysite/metal nanocomposites have been synthesized through the immobilization of preformed and in situ synthesized metal nanoparticles over halloysite surfaces, which in turn produce efficient, cost-effective, and environmentally benign heterogeneous catalysts.

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Mobaraki, Mohammadmahdi, Sonali Karnik, Yue Li, and David K. Mills. "Therapeutic Applications of Halloysite." Applied Sciences 12, no. 1 (December 22, 2021): 87. http://dx.doi.org/10.3390/app12010087.

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In recent years, nanomaterials have attracted significant research interest for applications in biomedicine. Many kinds of engineered nanomaterials, such as lipid nanoparticles, polymeric nanoparticles, porous nanomaterials, silica, and clay nanoparticles, have been investigated for use in drug delivery systems, regenerative medicine, and scaffolds for tissue engineering. Some of the most attractive nanoparticles for biomedical applications are nanoclays. According to their mineralogical composition, approximately 30 different nanoclays exist, and the more commonly used clays are bentonite, halloysite, kaolinite, laponite, and montmorillonite. For millennia, clay minerals have been extensively investigated for use in antidiarrhea solutions, anti-inflammatory agents, blood purification, reducing infections, and healing of stomach ulcers. This widespread use is due to their high porosity, surface properties, large surface area, excellent biocompatibility, the potential for sustained drug release, thermal and chemical stability. We begin this review by discussing the major nanoclay types and their application in biomedicine, focusing on current research areas for halloysite in biomedicine. Finally, recent trends and future directions in HNT research for biomedical application are explored.

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Chen, Xue-Gang, Ru-Chang Li, Ao-Bo Zhang, Shuang-Shuang Lyu, Shu-Ting Liu, Kang-Kang Yan, Wei Duan, and Ying Ye. "Preparation of hollow iron/halloysite nanocomposites with enhanced electromagnetic performances." Royal Society Open Science 5, no. 1 (January 2018): 171657. http://dx.doi.org/10.1098/rsos.171657.

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Nanostructures loaded on halloysite nanotubes (HNTs) have attracted global interest, because the nanotubular HNTs could extend the range of their potential applications. In this study, we fabricated a novel nanocomposite with hollow iron nanoparticles loaded on the surface of HNTs. The structure of the iron nanoparticles can be adjusted by ageing time. Owing to the increased remnant magnetization and coercivity values, the nanocomposites loaded with hollow iron nanoparticles showed better electromagnetic performance than that with solid iron nanoparticles. This study opens a new pathway to fabricate halloysite nanotubular nanocomposites that may gain applications in the catalytic degradation of organic pollutants and electromagnetic wave absorption.

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Wei, Yanfu, Peng Yuan, Dong Liu, Dusan Losic, Daoyong Tan, Fanrong Chen, Hongchang Liu, Junming Zhou, Peixin Du, and Yaran Song. "Activation of natural halloysite nanotubes by introducing lanthanum oxycarbonate nanoparticles via co-calcination for outstanding phosphate removal." Chemical Communications 55, no. 14 (2019): 2110–13. http://dx.doi.org/10.1039/c8cc10314c.

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Mu, Bin, Wenbo Wang, Junping Zhang, and Aiqin Wang. "Superparamagnetic sandwich structured silver/halloysite nanotube/Fe3O4nanocomposites for 4-nitrophenol reduction." RSC Adv. 4, no. 74 (2014): 39439–45. http://dx.doi.org/10.1039/c4ra05892e.

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Superparamagnetic sandwich structured silver/halloysite nanotube/Fe₃O₄(Ag/HNT/Fe₃O₄) nanocomposites were fabricated by selective modification of the lumen of halloysite nanotubes with silver nanorods and the external wall with Fe₃O₄nanoparticles.

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Dobrzański, Leszek Adam, Błażej Tomiczek, Grzegorz Matula, and Klaudiusz Gołombek. "Role of Halloysite Nanoparticles and Milling Time on the Synthesis of AA 6061 Aluminium Matrix Composites." Advanced Materials Research 939 (May 2014): 84–89. http://dx.doi.org/10.4028/www.scientific.net/amr.939.84.

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The aim of this work is to determine the effect of a reinforcing phase and manufacturing conditions on the structure and properties of newly developed nanostructural powders of composite materials with the aluminium alloy matrix reinforced with natural halloysite nanotubes. Composite materials were manufactured employing as a matrix the air atomized powders of AA 6061 aluminium alloy and as a reinforcement the halloysite nanotubes. Composite powders of aluminium alloy matrix reinforced with 5, 10 and 15 wt.% of halloysite nanotubes were fabricated by high-energy mechanical alloying using a planetary mill. Elaborated composite powders were characterized for their apparent density, microhardness, particle size distribution and microstructure. A structure of newly developed nanostructured composite materials reinforced with halloysite nanotubes prove that a mechanical alloying process allow to improve the arrangement of reinforcing particles in the matrix material. A homogenous structure with uniformly arranged reinforcing particles can be achieved by employing reinforcement with halloysite nanotubes if short time of mechanical alloying is maintained thus eliminating an issue of their agglomeration.

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Medina, Jorge, Marcela Calabi-Floody, Humberto Aponte, Christian Santander, Marina Paneque, Sebastian Meier, Marco Panettieri, Pablo Cornejo, Fernando Borie, and Heike Knicker. "Utilization of Inorganic Nanoparticles and Biochar as Additives of Agricultural Waste Composting: Effects of End-Products on Plant Growth, C and Nutrient Stock in Soils from a Mediterranean Region." Agronomy 11, no. 4 (April 14, 2021): 767. http://dx.doi.org/10.3390/agronomy11040767.

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This study was conducted to evaluate the effect of compost produced with agricultural residues and oat-based biochar, iron oxide and halloysite nanoparticles as additives of the process of composting on soil chemical properties, nutrient status and growth of ryegrass Lolium perenne L. For this, a 90-day mesocosm experiment was carried out under greenhouse conditions. Bare soil and a basal fertilization treatment were compared to soils amended with nonadditive compost (NA compost), compost supplied with oat-based biochar (Bioch compost), iron oxide nanoparticles (Fe compost), and halloysite nanoparticles (Ha compost). Compost supplied with nanoparticles and biochar combined were also considered. The incorporation of compost with or without additives increased the content of total C and N in soil, with N diminishing (total and mineral forms) and C/N modifications after 90 days. The addition of compost and co-composted treatments also increased the total contents of main nutrients such as Ca, K, P and S. Furthermore, the supply of additives into composting did not increase the concentration of trace toxic elements. At the end of the experiment, plant biomass increased by the addition of the different organic amendments, with the highest shoot biomass in soils amended with compost supplied with nanoparticles. These results suggest that the addition of compost based on agricultural residues with additives such as halloysite or biochar improves chemical properties and nutritional status of soil that favor and increase plant growth of Lollium perenne stablished in soils from the Mediterranean Region.

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Yang, Ziyin, Xiaohui Zheng, and Jianbin Zheng. "Non-enzymatic sensor based on a glassy carbon electrode modified with Ag nanoparticles/polyaniline/halloysite nanotube nanocomposites for hydrogen peroxide sensing." RSC Advances 6, no. 63 (2016): 58329–35. http://dx.doi.org/10.1039/c6ra06366g.

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Nagarajan, S., Sudhagar Pitchaimuthu, and Yong Soo Kang. "Synthesising chain-like, interconnected Pt nanoparticles using a tubular halloysite clay template for an efficient counter electrode in dye-sensitised solar cells." Sustainable Energy & Fuels 2, no. 2 (2018): 361–66. http://dx.doi.org/10.1039/c7se00292k.

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Sanchez-Ballester, Noelia M., Gubbala V. Ramesh, Toyokazu Tanabe, Eva Koudelkova, Jia Liu, Lok Kumar Shrestha, Yuri Lvov, Jonathan P. Hill, Katsuhiko Ariga, and Hideki Abe. "Activated interiors of clay nanotubes for agglomeration-tolerant automotive exhaust remediation." Journal of Materials Chemistry A 3, no. 12 (2015): 6614–19. http://dx.doi.org/10.1039/c4ta06966h.

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Hwa, Kuo-Yuan, Tata Sanjay Kanna Sharma, and Anindita Ganguly. "Design strategy of rGO–HNT–AgNPs based hybrid nanocomposite with enhanced performance for electrochemical detection of 4-nitrophenol." Inorganic Chemistry Frontiers 7, no. 10 (2020): 1981–94. http://dx.doi.org/10.1039/d0qi00006j.

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Yu, Wenlin, Qinpeng Dong, Wenbin Yu, Zonghua Qin, Xin Nie, Quan Wan, and Xiuli Chen. "Preparation of Halloysite/Ag2O Nanomaterials and Their Performance for Iodide Adsorption." Minerals 12, no. 3 (February 27, 2022): 304. http://dx.doi.org/10.3390/min12030304.

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Halloysite/Ag2O (Hal/Ag2O) nanomaterials were prepared by growing Ag2O nanoparticles on the surface of nanotubular halloysite using silver nitrate solution under alkaline conditions. The nanomaterials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and N2 adsorption. Good dispersion of Ag2O nanoparticles with average sizes of 6.07 ± 2.5 nm and 8.04 ± 3.8 nm was achieved in the nanomaterials when using different concentrations of alkali. The nanomaterial with 6.36% Ag2O (Hal/Ag2O-2) exhibited rapid adsorption to iodide (I−); adsorption equilibrium can be reached within 100 min. The adsorption capacity of I− on Hal/Ag2O-2 is 57.5 mg/g, which is more than 143 times higher than that of halloysite. The nanomaterial also showed a better adsorption capacity per unit mass of Ag2O due to the better dispersion and less coaggregation of Ag2O in the nanomaterial than in the pure Ag2O nanoparticles. Importantly, Hal/Ag2O-2 exhibited high selectivity for I−, and its I− removal efficiency was hardly affected by the coexistence of Cl−, Br−, or SO42−, as well as the initial pH of the solution. With an excellent adsorption performance, the prepared Hal/Ag2O nanomaterial could be a new and efficient adsorbent capable of the adsorption of radioactive I− from aqueous solution.

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Li, Zhi, Lejing Liu, Alejandro Jiménez González, and De-Yi Wang. "Bioinspired polydopamine-induced assembly of ultrafine Fe(OH)3 nanoparticles on halloysite toward highly efficient fire retardancy of epoxy resin via an action of interfacial catalysis." Polymer Chemistry 8, no. 26 (2017): 3926–36. http://dx.doi.org/10.1039/c7py00660h.

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Wei, Qiangbing, Ruirong Shi, Dedai Lu, and Ziqiang Lei. "In situ formation of gold nanoparticles on magnetic halloysite nanotubes via polydopamine chemistry for highly effective and recyclable catalysis." RSC Advances 6, no. 35 (2016): 29245–53. http://dx.doi.org/10.1039/c6ra02789j.

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A simple and green approach to fabricate magnetic halloysite nanotubes supported Au nanoparticles composite from bio-inspired polydopamine chemistry was demonstrated for highly effective and recyclable catalysis.

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Muthu, R. Naresh, S. Rajashabala, and R. Kannan. "Facile synthesis and characterization of a reduced graphene oxide/halloysite nanotubes/hexagonal boron nitride (RGO/HNT/h-BN) hybrid nanocomposite and its potential application in hydrogen storage." RSC Advances 6, no. 82 (2016): 79072–84. http://dx.doi.org/10.1039/c6ra13865a.

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Sadjadi, Samahe, Maryam Akbari, Eric Monflier, Majid M. Heravi, and Bastien Leger. "Pd nanoparticles immobilized on halloysite decorated with a cyclodextrin modified melamine-based polymer: a promising heterogeneous catalyst for hydrogenation of nitroarenes." New Journal of Chemistry 42, no. 19 (2018): 15733–42. http://dx.doi.org/10.1039/c8nj03014f.

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Lorusso, Caterina, Viviana Vergaro, Francesca Conciauro, Giuseppe Ciccarella, and Paolo Maria Congedo. "Thermal and mechanical performance of rigid polyurethane foam added with commercial nanoparticles." Nanomaterials and Nanotechnology 7 (January 1, 2017): 184798041668411. http://dx.doi.org/10.1177/1847980416684117.

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This study investigates the effects of commercial nanoparticles on thermal and mechanical performance of rigid polyurethane foams. Two different types of nanoparticles are considered as fillers, spherical titania and rod-shaped halloysite clay nanotubes. The aim of this study was to produce rigid polyurethane foams modified with titania nanocrystals and nanohalloysite in order to obtain polyurethanes with improved properties. The laboratory scale-up will be suitable for the production in many branches of industry, such as construction and automotive production. In particular, these foams, added with commercial nanoparticles, characterized by better thermal and mechanical properties, are mainly used in construction for thermal insulation of buildings. The fillers were dispersed in the components, bringing rates up to 10%. In these investigations, the improvement of the thermal properties occurs by adding nanoparticles in the range 4–8% of titania and halloysite. The mechanical properties instead have been observed an improvement starting from 6% of nanoparticles addition. All data are in agreement with scanning electron microscope observations that shown a decrease in the average cell size and an increase in the cell density by adding nanoparticles in foams.

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Stavitskaya, Anna, Christina Shakhbazova, Yulia Cherednichenko, Läysän Nigamatzyanova, Gölnur Fakhrullina, Nail Khaertdinov, Galiya Kuralbayeva, Alla Filimonova, Vladimir Vinokurov, and Rawil Fakhrullin. "Antibacterial properties and in vivo studies of tannic acid-stabilized silver–halloysite nanomaterials." Clay Minerals 55, no. 2 (June 2020): 112–19. http://dx.doi.org/10.1180/clm.2020.17.

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AbstractTannic acid-stabilized silver nanoparticles were synthesized in situ on halloysite clay nanotubes. The synthesis strategy included simple steps of tannic acid adsorption on clay nanotubes and further particle formation from silver salt solution. Pristine halloysite nanotubes as well as amino-modified clays were used for silver stabilization in water or ethanol. The materials were tested for antibacterial performance using three different methods. All of the materials produced showed antimicrobial activity. The pristine halloysite-based material with ~5 nm particles produced using ethanol as the solvent and tannic acid as the reducing agent showed the greatest antibacterial activity against Serratia marcescens. The materials were tested in vivo on Caenorhabditis elegans nematodes to ensure their safety, and they showed no negative effects on nematode growth and life expectancy.

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Massaro, M., C. G. Colletti, G. Lazzara, S. Milioto, R. Noto, and S. Riela. "Halloysite nanotubes as support for metal-based catalysts." Journal of Materials Chemistry A 5, no. 26 (2017): 13276–93. http://dx.doi.org/10.1039/c7ta02996a.

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Halloysite nanotubes (HNTs) are clay minerals with a hollow nanotubular structure. Due to their peculiar chemical characteristics, HNTs constitute valuable supports for metal nanoparticles, promoting catalytic applications with tunable properties.

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Zhang, Yi, and Huaming Yang. "Halloysite nanotubes coated with magnetic nanoparticles." Applied Clay Science 56 (February 2012): 97–102. http://dx.doi.org/10.1016/j.clay.2011.11.028.

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