Artykuły w czasopismach: „Glass-Nanocomposites”

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Zarbin, Aldo J. G., Marco-A. De Paoli i Oswaldo L. Alves. "Nanocomposites glass/conductive polymers". Synthetic Metals 99, nr 3 (luty 1999): 227–35. http://dx.doi.org/10.1016/s0379-6779(98)01510-0.

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Tijjani, Y. "Quartz, glass, and glass-ceramic matrix nanocomposites; containing carbon nanotubes: a review". Bayero Journal of Pure and Applied Sciences 15, nr 1 (9.12.2022): 1–10. http://dx.doi.org/10.4314/bajopas.v15i1.1.

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Various concepts of techniques for incorporating carbon nanotubes in quartz, glass and glass-ceramic matrices are overviewed. Mechanical; in particular fracture toughness, hardness and strength, physical; density and microstructures, and functional; thermal and electrical conductivities of the fabricated CNT-loaded nanocomposites via different processing route and measuring techniques were compared and reported. Processing challenges such as the homogenous dispersion of the CNTs in the quartz, glass and glassceramic matrices and the loss of graphitic nanotubes during the consolidation process are still the major impending issues in CNT-quartz/glass/glass-ceramic matrix nanocomposites. There is need to explore in-situ production techniques, spark plasma sintering consolidation method, and controlled colloidal/sol-gel processes for CNTquartz/glass/glass-ceramic matrix nanocomposites.

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Peng, Shirley, i Jude O. Iroh. "Dependence of the Dynamic Mechanical Properties and Structure of Polyurethane-Clay Nanocomposites on the Weight Fraction of Clay". Journal of Composites Science 6, nr 6 (14.06.2022): 173. http://dx.doi.org/10.3390/jcs6060173.

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The effect of clay and chemical cross-linking on the dynamic mechanical properties of polyurethane reinforced with different concentrations of organically modified montmorillonite clay is investigated in this study. The polyurethane matrix is constituted of polytetrahydrofuran soft segment and 4,4′-methylenebis(phenyl isocyanate) hard segment. Glycerin was used as the chemical crosslinking agent, while Cloisite 30B clay was the reinforcing filler. The nanocomposites containing up to 1 wt.% clay showed a uniform dispersion of clay; however, the nanocomposites containing higher concentrations of clay showed the presence of heterogeneities. Dynamic mechanical spectroscopy, DMS revealed that the nanocomposites containing between 2 and 10 wt.% clay had two glass transition temperatures, Tg,1 and Tg,2. The higher-temperature glass transition temperature, Tg,2 increased with increasing clay concentration, while the low-temperature glass transition temperature, Tg,1 decreased with increasing clay concentration. The nanocomposites containing low clay concentrations up to 1 wt.% showed only one glass transition temperature with a narrow glass transition region. The crosslink density for the nanocomposites increased with increasing wt.% clay.

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Prasad, M. M., N. Manikandan i S. M. Sutharsan. "Investigation on mechanical properties of reinforced glass fibre/epoxy with hybrid nano composites". Digest Journal of Nanomaterials and Biostructures 16, nr 2 (2021): 455–69. http://dx.doi.org/10.15251/djnb.2021.162.455.

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In this study the experimental investigation of mechanical behaviour of Multi-Walled Carbon nanotubes (MWCNTs) and Aluminium Oxide (Al2O3) reinforced with EGlass/Epoxy nanocomposites at 0.5%, 1.5% and 2.0% of weight rated with 225 GSM, 300 GSM and 450 GSM glass fibres were studied. Test specimens were prepared at the standardof ASTM D638 for tensile specimen ASTM D256 for impact specimen. Testspecimens were prepared at the ratio of MWCNTs: Al2O3 is 1:4. 1.5 wt. % of MultiWalled CNTs filledE-Glass/Epoxy nanocomposites showed improved mechanical properties than glass fiber reinforced epoxy composites.450 GSM reinforced glass fiber epoxy composites containing 1.5wt. % of MWCNTs improved 36.27 % of higher tensile value and 28.57 % of impact value than the glass fibre reinforced epoxy composites. 225 and 300 GSM reinforced glass fibre epoxy composites with 1.5 wt. % of MWCNTs composites also has improved tensile and impact value than glass fibre reinforced epoxy composites. But, overall 450 GSM reinforced fibre nanocomposites showed enhanced mechanical properties than the other GSM reinforced nanocomposites. This proves MultiWalled Carbon Nanotubes is a successful reinforcement for E-Glass/Epoxy matrix and it improves its properties and performance.

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Tsai, Jia Lin, i Ming Dao Wu. "Organoclay Effect on Transverse Tensile Strength and In-Plane Shear Strength of Unidirectional Glass/Epoxy Nanocomposites". Key Engineering Materials 334-335 (marzec 2007): 773–76. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.773.

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This research focuses on the fabrication of glass fiber/epoxy organoclay nanocomposites as well as on the investigation of organoclay effect on transverse tensile strength and in-plane shear strength of the nanocomposites. To demonstrate the organoclay effect, three different loadings of organoclay were dispersed respectively in the epoxy resin using a mechanical mixer followed by sonication. The corresponding glass/epoxy nanocomposites were produced by impregnating dry glass fiber with organoclay epoxy compound via a vacuum hand lay-up procedure. For evaluating transverse tensile strengths, the unidirectional coupon specimens were prepared and tested in the transverse direction. Results indicate that with the increment of organoclay loadings, the glass/epoxy nanocomposites demonstrate higher transverse tensile strength. On the other hand, the in-plane shear strengths were measured from [± 45]s laminates. It is revealed that when the organoclay loadings increase, the in-plane shear strength of glass/epoxy nanocomposites also increases appropriately. Scanning Electron Microscopy (SEM) observations on the failure surfaces indicate that the increasing characteristics in transverse and in-plane failure stresses may be ascribed to the enhanced fiber/matrix bonding modified by the organoclay.

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Ganshina, Elena Alexandrovna, Vladimir Valentinovich Garshin, Ilya Mikhailovich Pripechenkov, Sergey Alexandrovich Ivkov, Alexander Victorovich Sitnikov i Evelina Pavlovna Domashevskaya. "Effect of Phase Transformations of a Metal Component on the Magneto-Optical Properties of Thin-Films Nanocomposites (CoFeZr)x (MgF2)100−x". Nanomaterials 11, nr 7 (24.06.2021): 1666. http://dx.doi.org/10.3390/nano11071666.

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The results of complex studies of structural-phase transformations and magneto-optical properties of nanocomposites (CoFeZr)x (MgF2)100−x depending on the metal alloy content in the dielectric matrix are presented. Nanocomposites were deposited by ion-beam sputtering onto glass and glass-ceramic substrate. By studying the spectral and field dependences of the transversal Kerr effect (TKE), it was found that the transition of nanocomposites from superparamagnetic to the ferromagnetic state occurs in the region of xfm~30 at%, that corresponds to the onset the formation of ferromagnetic nanocrystals CoFeZr with hexagonal syngony in amorphous dielectric matrix of MgF2. With an increase of concentrations of the metal alloy for x > xfm, the features associated with structural transitions in magnetic granules are revealed in the TKE spectra. Comparison of the spectral and concentration dependences of TKE for nanocomposites on the glass and glass-ceramics substrates showed that the strongest differences occur in the region of the phase structural transition of CoFeZr nanocrystals from a hexagonal to a body-centered cubic structure at x = 38 at.% on the glass substrates and at x = 46 at.% on glass-ceramics substrates, due to different diffusion rates and different size of metal nanocrystals on amorphous glass substrates and more rough polycrystalline glass-ceramics substrates.

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Hu, Xiao Lan, Xi Lan, Teng Fei Lu, Hong Shan Yang i Ying Lai Yang. "A Copolymerization Modified Acrylate Resin and its Polyhedral Oligomeric Silsesquioxane Composites". Advanced Materials Research 887-888 (luty 2014): 97–100. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.97.

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An acrylate resin copolymerized with epoxy and amino resin was prepared in this paper, and its polyhedral oligomeric silsesquioxane (POSS) modified nanocomposites were fabricated via physical blending. Results showed that glass transition temperature of the acrylate copolymer was about 7.9 oC via DSC. Dispersion of nanocomposites with aminopropyllsobutyl POSS is better than those with Octalsobutyl POSS. Moreover, glass transition temperatures of the nanocomposites with POSS are close to the acrylate copolymer matrix.

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Daneshpayeh, Sajjad, Amir Tarighat, Faramarz Ashenai Ghasemi i Mohammad Sadegh Bagheri. "A fuzzy logic model for prediction of tensile properties of epoxy/glass fiber/silica nanocomposites". Journal of Elastomers & Plastics 50, nr 6 (18.10.2017): 491–500. http://dx.doi.org/10.1177/0095244317733768.

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The object of this work is to study and predict the tensile properties (tensile strength, elastic modulus, and elongation at break) of ternary nanocomposites based on epoxy/glass fiber/nanosilica using the fuzzy logic (FL). Two factors in three levels including glass fiber at 0, 5, and 10 wt% and nanosilica at 0, 0.5, and 1 wt% were chosen for adding to an epoxy matrix. From FL surfaces, it was found that the glass fiber content had a main role in the tensile properties of nanocomposites. The high levels of glass fiber content led to a significant increase in the elastic modulus and generally, the presence of glass fiber decreased the tensile strength and elongation at break. Also, addition of the nanosilica content resulted in an increased elastic modulus but decreased the elongation at break of nanocomposites. Finally, an FL model was obtained for each tensile property.

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Tsai, Jia Lin, Jui Ching Kuo i Shin Ming Hsu. "Fabrication and Mechanical Properties of Glass Fiber/Epoxy Nanocomposites". Materials Science Forum 505-507 (styczeń 2006): 37–42. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.37.

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This research is aimed to fabricate glass fiber/epoxy nanocomposites containing organoclay as well as to understand the organoclay effect on the in-plane shear strength of the nanocomposites. To demonstrate the organoclay effect, three different loadings of organoclay, were dispersed in the epoxy resin using mechanical mixer followed by sonication. The corresponding glass/epoxy nanocomposites were prepared by impregnating the organoclay epoxy mixture into the dry glass fiber through a vacuum hand lay-up process. Off-axis block glass/epoxy nanocomposites were tested in compression to produce in-plane shear failure. It is noted only the specimens showing in-plane shear failure mode were concerned in this study. Through coordinate transformation law, the uniaxial failure stresses were then converted to a plot of shear stress versus transverse normal stress from which the in-plane shear strength was obtained. Experimental results showed that the fiber/epoxy nanocomposite exhibit higher in-plane shear strength than the conventional composites. This increased property could be ascribed to the enhanced fiber/matrix adhesion promoted by the organoclay.

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Fujino, Shigeru, i Hiroshi Ikeda. "Room Temperature Imprint Using Crack-Free Monolithic SiO2-PVA Nanocomposite for Fabricating Microhole Array on Silica Glass". Journal of Nanomaterials 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/584320.

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This paper aims to fabricate microhole arrays onto a silica glass via a room temperature imprint and subsequent sintering by using a monolithic SiO2-poly(vinyl alcohol) (PVA) nanocomposite as the silica glass precursor. The SiO2-PVA suspension was prepared from fumed silica particles and PVA, followed by drying to obtain tailored SiO2-PVA nanocomposites. The dependence of particle size of the fumed silica particles on pore size of the nanocomposite was examined. Nanocomposites prepared from 7 nm silica particles possessed suitable mesopores, whereas the corresponding nanocomposites prepared from 30 nm silica particles hardly possessed mesopores. The pore size of the nanocomposites increased as a function of decreasing pH of the SiO2-PVA suspension. As a consequence, the crack-free monolithic SiO2-PVA nanocomposite was obtained using 7 nm silica particles via the suspension at pH 3. Micropatterns were imprinted on the monolithic SiO2-PVA nanocomposite at room temperature. The imprinted nanocomposite was sintered to a transparent silica glass at 1200°C in air. The fabricated sintered glass possessed the microhole array on their surface with aspect ratios identical to the mold.

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Bhattacharya, Sanjib, Arun Kr Bar, Debasish Roy, M. P. F. Graca i M. A. Valente. "Dielectric Response of Zincmolybdate Glass-Nanocomposites". Journal of Advanced Physics 1, nr 2 (1.12.2012): 120–25. http://dx.doi.org/10.1166/jap.2012.1016.

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Bhattacharya, Sanjib, Arun Kr Bar i Debasish Roy. "Structural Study of Molybdate Glass-Nanocomposites". Journal of Advanced Physics 2, nr 3 (1.09.2013): 241–44. http://dx.doi.org/10.1166/jap.2013.1070.

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Houphouët-Boigny, Chrystèle, Christopher J. G. Plummer, Martyn D. Wakeman i Jan-Anders E. Månson. "Hybrid Glass Fiber-reinforced Thermoplastic Nanocomposites". Journal of Thermoplastic Composite Materials 21, nr 1 (styczeń 2008): 103–18. http://dx.doi.org/10.1177/0892705707084545.

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Bhattacharya, Sanjib, Arun Kr Bar, Debasish Roy, M. P. F. Graca i M. A. Valente. "Electrical Conductivity of Zincmolybdate Glass-Nanocomposites". Advanced Science Letters 16, nr 1 (1.09.2012): 399–402. http://dx.doi.org/10.1166/asl.2012.3311.

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Bhattacharya, Sanjib, i Aswini Ghosh. "Relaxation Dynamics in Superionic Glass Nanocomposites". Journal of the American Ceramic Society 91, nr 3 (marzec 2008): 753–59. http://dx.doi.org/10.1111/j.1551-2916.2007.02099.x.

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Bhattacharya, Sanjib, Debashis Roy, M. P. F. Graca, M. A. Valente i Arun Kr. Bar. "Dielectric Behavior of Iodomolybdate Glass-Nanocomposites". Advanced Science Letters 3, nr 4 (1.12.2010): 523–26. http://dx.doi.org/10.1166/asl.2010.1144.

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Chakravorty, D., S. Basu, P. K. Mukherjee, S. K. Saha, B. N. Pal, A. Dan i S. Bhattacharya. "Novel properties of glass–metal nanocomposites". Journal of Non-Crystalline Solids 352, nr 6-7 (maj 2006): 601–9. http://dx.doi.org/10.1016/j.jnoncrysol.2005.11.047.

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Dan, A., B. Satpati, P. V. Satyam i D. Chakravorty. "Diodelike behavior in glass–metal nanocomposites". Journal of Applied Physics 93, nr 8 (15.04.2003): 4794–800. http://dx.doi.org/10.1063/1.1559429.

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Akkapeddi, M. K. "Glass fiber reinforced polyamide-6 nanocomposites". Polymer Composites 21, nr 4 (sierpień 2000): 576–85. http://dx.doi.org/10.1002/pc.10213.

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Nguyen Trung Thanh, Nguyen Ba Ngoc, Truong Dinh Tuan, Le Thanh Viet, Hoang Ngoc Phuoc, Nguyen Van Huy i Tran Van Quyen. "Preparation and Properties of Nanocomposite Based on K-153 Epoxy Reinforced T-13 Glass Fiber". Malaysian Journal on Composites Science & Manufacturing 10, nr 1 (30.03.2023): 1–10. http://dx.doi.org/10.37934/mjcsm.10.1.110.

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This study aims to investigate the influence of nanosilica content and the ratio of glass fiber/epoxy resin on the mechanical properties of nanocomposites based on K-153 epoxy resin (K-153) matrix reinforced by T-13 glass fiber (T-13). Thermogravimetric Analysis (TGA), Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-Ray Analysis (EDX) were used to examine the results of the investigations. The findings showed that the nanosilica of 1.20 weight percent (wt.%) was suitable for making K-153/T-13/nanosilica nanocomposites. Compared to K-153/T-13 polymer composites, K-153/T-13/nanosilica nanocomposites with nanosilica content of 0- 1.2 wt.% and the ratio of T-13 glass fiber/K-153 epoxy resin at 70/30 wt.%, the tensile strength had increased from 215.41 MPa to 313.12 MPa and from 230.96 MPa to 325.35 MPa for flexural strength. Besides that, the thermal resistance of nanocomposites also increases compared to that of polymer composites based on K-153 epoxy resin. At 500 °C, the weight loss of nanocomposites and polymer composites was 34.01 % and 37.67 %, respectively.

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Rozra, Jyoti, Isha Saini, Sanjeev Aggarwal i Annu Sharma. "Synthesis and Characterization of Ag - Soda Glass Nanocomposites". Advanced Materials Research 585 (listopad 2012): 120–23. http://dx.doi.org/10.4028/www.scientific.net/amr.585.120.

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In the present work we have used Physical vapour deposition (PVD) technique followed by thermal annealing to synthesize Ag-soda glass nanocomposite samples. This technique offers a great deal of promise in terms of general simplicity of operation, minimal requirements for sample preparation, ease of adaptation to automated operation, and potential for scale up to production levels of material throughput. Ag-glass nanocomposites were synthesized by deposited Ag on glass slides and the resulting samples were annealed in air at various temperatures from 400 °C to 550 °C for 1 hour. Optical absorption spectrum of the resulting nanocomposites was measured in the range from 190 nm to 900 nm using UV-Visible absorption spectroscopy. The appearance of SPR peak characteristic of Ag nanoparticle formation around 420 nm in optical spectra of annealed samples indicates towards the formation of silver nanoparticles in soda glass. The size of silver nanoparticles has been found to increase with increase in annealing temperatures. Structural properties of resulting nanocomposites were also studied using TEM and FE-SEM alongwith EDAX spectra. Synthesized composites are more conducting than pristine glass and conductivity increases with increase in size of Ag nanoparticles embedded in glass. Possible mechanism for increase in conductivity has been discussed.

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Yeh, Meng Kao, Nyan Hwa Tai i Yan Jyun Lin. "Glass Transition Temperature of Phenolic-Based Nanocomposites Reinforced by MWNTs and Carbon Fibers". Key Engineering Materials 334-335 (marzec 2007): 713–16. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.713.

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The multi-walled carbon nanotubes (MWNTs) and carbon fibers (CFs) were added to the phenolic resin to fabricate MWNTs/phenolic, MWNTs/CFs/phenolic nanocomposites and CFs/phenolic composites by hot press method. The differential scanning calorimetry (DSC) test was performed for the above-mentioned three kinds of composites. The valley points on the slope of endothermic responses correspond to the glass transition temperatures of the composites. The MWNTs/phenolic nanocomposites had the lowest glass transition temperature among the three kinds of composites discussed, which indicated a better thermal conductivity property of MWNTs. Phenolic-based composites reinforced by different weight percentages of MWNTs and CFs were also investigated. The tensile failure morphologies of nanocomposite specimens were examined using a scanning electron microscope to evaluate the possible effects on the glass transition temperature of nanocomposites..

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Pielichowska, Kinga, Dariusz Bieliński, Michał Dworak, Ewelina Kilian, Beata Macherzyńska i Stanisław Błażewicz. "The Influence of Nanohydroxyapatite on the Thermal, Mechanical, and Tribological Properties of Polyoxymethylene Nanocomposites". International Journal of Polymer Science 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/9051914.

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The influence of nanohydroxyapatite on the glass transition region and its activation energy, as well as on the tribological and mechanical properties of polyoxymethylene nanocomposites, was investigated using DMA, TOPEM DSC, nanoindentation, and nondestructive ultrasonic methods. It was found that the glass transition for unmodified POM was in the lower temperature range than in POM/HAp nanocomposites. Moreover,ΔCpand activation energy were larger for POM/HAp nanocomposites. Friction coefficient was higher for POM/HAp nanocomposites in comparison to both POM homopolymer and POM copolymer. Simultaneously, the indentation test results show that microhardness is also higher for POM/HAp nanocomposites than for POM. From ultrasonic investigations it was found that the highest values of both longitudinal and transverse propagation waves and Young’s and shear modulus for POM homopolymer (DH) and POM copolymer T2H and their nanocomposites can be attributed to their higher degree of crystallinity in comparison to UH copolymer. Moreover, for POM/HAp nanocomposites with 5% of HAp, ultrasonic longitudinal wave velocity was almost constant even after 1000000 mechanical loading cycles, evidencing an enhancement of mechanical properties by HAp nanoparticles.

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PARK, S. J., F. L. JIN i J. R. LEE. "PREPARATION AND PROPERTIES OF A NOVEL EPOXIDIZED CASTOR OIL/CLAY NANOCOMPOSITES". International Journal of Nanoscience 03, nr 04n05 (sierpień 2004): 663–69. http://dx.doi.org/10.1142/s0219581x04002504.

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A novel nanocomposites of modified clay in a glassy epoxy were prepared using a direct melt intercalation technique. The contents of oganoclay were varied with 0, 1, 2, and 3 wt% and N-benzylpyrazinium hexafluoroantimonate (BPH) was used for curing of epoxy matrix as a cationic latent catalyst. Dynamic mechanical analysis (DMA) measurement was performed to examine the glass transition temperature of the nanocomposites. As a result, X-ray diffraction indicated the intercalation of the epoxy chains happening inside the gallery of clay. The nanocomposites showed a higher glass transition temperature and storage modulus than those of the pristine epoxy. The mechanical interfacial properties of the nanocomposites were also investigated and the improvement in tearing energy of 160% over pristine epoxy was obtained.

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Берштейн, В. А., А. М. Файнлейб, П. Н. Якушев, Д. А. Кириленко i О. Г. Мельничук. "Сверхтермостойкие полимерные нанокомпозиты на основе гетероциклических сеток: структура и свойства". Физика твердого тела 61, nr 8 (2019): 1542. http://dx.doi.org/10.21883/ftt.2019.08.47986.428.

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Nanocomposites based on heterocyclic polymer network, obtained from bisphthalonitrile and different (0.03-5.0 wt. %) contents of modified silicate montmorillonite (MMT) nanolayers, were studied. Their nanostructure, thermal, relaxation and elastic properties were characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDXS), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). DMA and TGA measurements were performed in both air and nitrogen mediums at temperatures from 20° to 600–900°C. Depending on MMT content, different extents of its exfoliation in the matrix, from single nanolayers to thin and “thick” MMT stacks were observed in the nanocomposites. The pronounced effects of constraining dynamics by nanoparticles and dynamic heterogeneity in the glass transition are shown. The possibilities for total suppression of glass transition and invariable elastic properties of nanocomposites within the temperature range from 20° to 600°C were shown. The studied nanocomposites manifest unique (for polymers) thermal properties, with glass transition temperature up to 570°С and satisfactory thermal stability, with retaining the material integrity, up to ~500°C in air and to ~900°C in N2 medium.

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Jin, Fan Long, Mi Jeong Han, Jae Rock Lee i Soo Jin Park. "Preparation and Characterization of Environmental-Friendly Epoxy Resins/Clay Nanocomposites". Solid State Phenomena 119 (styczeń 2007): 219–22. http://dx.doi.org/10.4028/www.scientific.net/ssp.119.219.

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The environmental-compatible epoxy resins/clay nanocomposites were prepared by using epoxidized castor oil (ECO) and two ion-exchanged clays. The glass transition temperature (Tg) and mechanical interfacial properties of ECO/clay nanocomposites were investigated. As a result, the nanocomposites showed higher Tg than that of neat ECO. The mechanical interfacial properties of both the nanocomposites were significantly increased on increasing the clay content.

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Elhenawy, Yasser, Yasser Fouad, Haykel Marouani i Mohamed Bassyouni. "Simulation of Glass Fiber Reinforced Polypropylene Nanocomposites for Small Wind Turbine Blades". Processes 9, nr 4 (1.04.2021): 622. http://dx.doi.org/10.3390/pr9040622.

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This study aims to evaluate the effect of functionalized multi-walled carbon nanotubes (MWCNTs) on the performance of glass fiber (GF)-reinforced polypropylene (PP) for wind turbine blades. Support for theoretical blade movement of horizontal axis wind turbines (HAWTs), simulation, and analysis were performed with the Ansys computer package to gain insight into the durability of polypropylene-chopped E-glass for application in turbine blades under aerodynamic, gravitational, and centrifugal loads. Typically, polymer nanocomposites are used for small-scale wind turbine systems, such as for residential applications. Mechanical and physical properties of material composites including tensile and melt flow indices were determined. Surface morphology of polypropylene-chopped E-glass fiber and functionalized MWCNTs nanocomposites showed good distribution of dispersed phase. The effect of fiber loading on the mechanical properties of the PP nanocomposites was investigated in order to obtain the optimum composite composition and processing conditions for manufacturing wind turbine blades. The results show that adding MWCNTs to glass fiber-reinforced PP composites has a substantial influence on deflection reduction and adding them to chopped-polypropylene E-glass has a significant effect on reducing the bias estimated by finite element analysis.

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Mordkovich, Vladimir Z., Stanislav V. Kondrashov, Aida R. Karaeva, Sergey A. Urvanov, Nikita V. Kazennov, Eduard B. Mitberg i Ekaterina A. Pushina. "Epoxy Nanocomposites with Carbon Nanotubes Produced by Floating Catalyst CVD". Nanomaterials 11, nr 5 (4.05.2021): 1213. http://dx.doi.org/10.3390/nano11051213.

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Epoxy nanocomposites with float catalysis-produced CNT felt as a filler were prepared. Parameters such as the curing process, glass transition of epoxynanocomposites, structure and morphology of CNT felt, initial epoxy composition, and epoxy nanocomposites were investigated. The influence of CNT felt on curing process in epoxy nanocomposites with different amounts of curing agent was determined. An exothermic reaction between the curing agent and the surface of CNTs was established. It was found that the structure of epoxy nanocomposites has a high degree of heterogeneity: the presence of fiber-like structures and individualized CNTs is observed together with the regions that are typical for CNTs that are fabricated via a catalytic chemical vapor deposition (CVD). Based on the studies performed, it is possible to predict the production of epoxy nanocomposites with outstanding mechanical and thermophysical properties. In particular, the uncured compositions already obtained in this work can be used for the manufacture of electrically conductive glass and carbon fiber reinforced plastics and functional coatings.

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Gou, Jihua, Scott O'Braint, Haichang Gu i Gangbing Song. "Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper". Journal of Nanomaterials 2006 (2006): 1–7. http://dx.doi.org/10.1155/jnm/2006/32803.

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Vacuum-assisted resin transfer molding (VARTM) process was used to fabricate the nanocomposites through integrating carbon nanofiber paper into traditional glass fiber reinforced composites. The carbon nanofiber paper had a porous structure with highly entangled carbon nanofibers and short glass fibers. In this study, the carbon nanofiber paper was employed as an interlayer and surface layer of composite laminates to enhance the damping properties. Experiments conducted using the nanocomposite beam indicated up to 200–700% increase of the damping ratios at higher frequencies. The scanning electron microscopy (SEM) characterization of the carbon nanofiber paper and the nanocomposites was also conducted to investigate the impregnation of carbon nanofiber paper by the resin during the VARTM process and the mechanics of damping augmentation. The study showed a complete penetration of the resin through the carbon nanofiber paper. The connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the nanocomposites during the damping tests.

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Rudenko, Valentyn, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya i Yuriy Garbovskiy. "Probing Optical Nonlinearities of Unconventional Glass Nanocomposites Made of Ionic Liquid Crystals and Bimetallic Nanoparticles". Nanomaterials 12, nr 6 (11.03.2022): 924. http://dx.doi.org/10.3390/nano12060924.

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In this paper, we report the synthesis and characterization of unconventional nanocomposites made of bimetallic nanoparticles dispersed in a liquid crystal glass. Core-shell bimetallic nanoparticles (Ag/Au or Au/Ag) and Ag-Au bimetallic nanoalloys are synthesized using cadmium alkanoate glass-forming liquid crystals as nanoreactors. Optical spectra of the produced glassy nanocomposites exhibit a distinctive absorption peak due to a surface plasmon resonance. In addition, these unusual materials demonstrate a strong nonlinear–optical response probed by means of the Z-scan technique. The use of near-infrared (1064 nm) and visible (532 nm) nanosecond laser pulses reveal a variety of nonlinear–optical mechanisms that depend on the composition of the studied nanocomposites. Our results indicate that metal alkanoate-based glass-forming ionic liquid crystals with embedded plasmonic nanoparticles are promising, yet they are overlooked photonic nanomaterials suitable for optical and nonlinear-optical applications.

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He, Shao Jian, i Jun Lin. "Nanocomposites Based on Hyperbranched Polymers and Montmorillonite". Applied Mechanics and Materials 108 (październik 2011): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amm.108.91.

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Nanocomposites based on hyperbranched polymers and sodium montmorillonite were prepared over the full range of compositions. The XRD analysis showed the full exfoliation of silicate layers at lower silicate content (up to 9.1 wt%). With the further increase of silicate loading, an intercalated structure was developed with a constant d-spacing due to the unique structure of hyperbranched polymers. The heat capacity jump at the glass transition of the nanocomposites was found to deviate from the two-phase model prediction, indicating the formation of a rigid amorphous fraction. The glass transition temperature and heat capacity jump behaviors suggested that the molecular mobility of hyperbranched polymers were restricted by the introduction of silicate layers. The mechanical properties of the nanocomposites were also investigated.

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Plummer, Christopher J. G., Sara Dalle Vacche, Chrystèle Houphouët-Boigny, Véronique Michaud i Jan Anders E. Månson. "Hybrid Glass Mat Reinforced Polypropylene-Montmorillonite Nanocomposites". Solid State Phenomena 151 (kwiecień 2009): 60–66. http://dx.doi.org/10.4028/www.scientific.net/ssp.151.60.

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Although addition of montmorillonite (MMT) clay to isotactic polypropylene (iPP) results in large increases in the melt viscosity at low shear rates, satisfactory impregnation of glass mats is obtained with iPP/MMT under conditions typical of industrial processing, and the MMT is well dispersed throughout the resulting composites. However, the MMT is also shown to retard relaxation of the glass mat, leading to non-uniform through-thickness glass fiber distributions. Thus, depending on the initial lay-up and hence on the initial surface fiber concentration, the bending modulus of the consolidated specimens may either increase or decrease with increasing matrix MMT content, whereas the tensile modulus remains consistent with the predictions of micromechanical models based on the assumption of a uniform glass fiber distribution. The presence of matrix-rich layers at surfaces of specimens containing MMT is also shown to promote crack initiation and induce premature failure in flexural tests.

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33

Atkarskaya, A. B., O. V. Mkrtychev, V. E. Privalov i V. G. Shemanin. "Laser ablation of the glass nanocomposites studies". Optical Memory and Neural Networks 23, nr 4 (październik 2014): 265–70. http://dx.doi.org/10.3103/s1060992x14040018.

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Halonen, M., A. A. Lipovskii i Yu P. Svirko. "Femtosecond absorption dynamics in glass-metal nanocomposites". Optics Express 15, nr 11 (2007): 6840. http://dx.doi.org/10.1364/oe.15.006840.

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Bar, Arun Kr, Ranadip Kundu, Debasish Roy i Sanjib Bhattacharya. "Giant Hardness of Heat-Treated Glass-Nanocomposites". Journal of Advanced Physics 3, nr 3 (1.09.2014): 241–43. http://dx.doi.org/10.1166/jap.2014.1130.

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Charnaya, E. V., M. K. Lee, C. Tien, V. N. Pak, D. V. Formus, A. L. Pirozerskii, A. I. Nedbai, E. V. Ubyivovk, S. V. Baryshnikov i L. J. Chang. "Magnetic properties of porous glass-CuO nanocomposites". Physics of the Solid State 54, nr 9 (wrzesień 2012): 1891–95. http://dx.doi.org/10.1134/s1063783412090077.

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Ash, B. J., L. S. Schadler i R. W. Siegel. "Glass transition behavior of alumina/polymethylmethacrylate nanocomposites". Materials Letters 55, nr 1-2 (lipiec 2002): 83–87. http://dx.doi.org/10.1016/s0167-577x(01)00626-7.

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Antuzevics, Andris, Guna Krieke, Elina Pavlovska i Uldis Rogulis. "Eu3+ ion distribution in oxyfluoride glass nanocomposites". Journal of Non-Crystalline Solids 522 (październik 2019): 119548. http://dx.doi.org/10.1016/j.jnoncrysol.2019.119548.

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Houphouet-Boigny, C., C. J. G. Plummer, S. Dalle Vacche, V. Michaud, M. D. Wakeman i J. A. E. Månson. "Hybrid Glass Mat-reinforced Polypropylene-Montmorillonite Nanocomposites". Journal of Composite Materials 44, nr 9 (29.10.2009): 1075–97. http://dx.doi.org/10.1177/0021998309344639.

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Sokolov, K. S., V. V. Zhurikhina, D. Yu Kazantsev i A. P. Kovarsky. "Studies of copper-silver glass-metal nanocomposites". Surface and Interface Analysis 45, nr 1 (14.03.2012): 366–68. http://dx.doi.org/10.1002/sia.4935.

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Merah, Necar, Farhan Ashraf i Mian M. Shaukat. "Mechanical and Moisture Barrier Properties of Epoxy–Nanoclay and Hybrid Epoxy–Nanoclay Glass Fibre Composites: A Review". Polymers 14, nr 8 (16.04.2022): 1620. http://dx.doi.org/10.3390/polym14081620.

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Epoxy clay nanocomposites have been proven to have improved mechanical, thermal and physical properties over pristine matrix. Thus, the fields of application of epoxy–clay nanocomposites along with their hybrid glass/carbon fibre reinforced composites have grown tremendously during the last few decades. The present review paper covers the research work performed on epoxy clay nanocomposites. It includes the influence of the processing techniques and parameters on the morphology of the nanocomposite, the methods of characterization and the effects of adding nanoclay on the mechanical and physical properties of composite. The improvements in the liquid barrier properties brought about by the addition of nanoclay platelets to epoxy resin are discussed. The variation of physical and mechanical properties with nanoclay type and content are reviewed along with the effects of moisture uptake on these properties. The advances in the development, characterization and applications of hybrid glass fibre reinforced epoxy–clay nanocomposites are discussed. Findings of the research work on the influence of nanoclay addition and exposure to water laden atmospheres on the behaviour of the hybrid glass fibre epoxy–nanoclay composites are presented. Finally, the potential health and environmental issues related to nanomaterials and their hybrid composites are reviewed.

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Sharma, Bikramjit, Rahul Chhibber i Rajeev Mehta. "Effect of mixing parameters, postcuring, and stoichiometry on mechanical properties of fiber reinforced epoxy–clay nanocomposites". Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, nr 7 (10.01.2018): 1363–74. http://dx.doi.org/10.1177/1464420717752023.

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The influence of processing variables was experimentally studied for glass fiber reinforced epoxy–clay nanocomposites manufactured using vacuum-assisted wet layup method. The tensile strength, flexural strength, and interlaminar shear strength of these nanocomposites were significantly influenced by the processing variables including the temperature of resin–clay mixture, speed of homogenization, and ultrasonic probe amplitude during premixing of clay minerals in epoxy. The glass transition temperature of glass fiber reinforced composites increased with incorporation of clay minerals in epoxy. Also, the postcuring of the laminates was carried out at three different temperatures, e.g. 100, 130, and 150 ℃ for 3 h. A decrease in tensile modulus, tensile strength, and flexural strength of nanocomposites postcured at 130 and 150 ℃ was observed. Also, the use of non-stoichiometric epoxy resin and hardener ratios had an adverse effect on mechanical properties of fiber reinforced epoxy–clay nanocomposites. In fiber reinforced composites incorporating clay minerals, a uniform dispersion of clay minerals besides a strong interfacial adhesion between clay minerals and polymer and optimum conditions of curing of matrix is a crucial aspect for improved performance over conventional fiber reinforced composites.

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43

Jayaganthan, Rengaswamy, i Rohitkumar H. Vora. "Experimental Investigation and Monte Carlo Simulation of Glass Transition in Polymer Nanocomposites". Journal of Metastable and Nanocrystalline Materials 23 (styczeń 2005): 339–42. http://dx.doi.org/10.4028/www.scientific.net/jmnm.23.339.

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The glass transition temperature (Tg) of Fluoro-Poly(ether-imide) and Fluoro-Poly(either-Imide)/MMY clay Nanocomposites has been investigated by both experiments and Monte Carlo Simulation. It was observed that the (Tg) values of the nanocomposites increases with increase in clay contents.

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JUNG, KWANG HO, YANGSOO KIM i YONGSOON LIM. "PREPARATION OF ANTIBACTERIAL POLYESTER GLASS MAT SHEETS CONTAINING PDMAEMA-FUNCTIONALIZED MWNT NANOCOMPOSITES". International Journal of Modern Physics B 25, nr 31 (20.12.2011): 4311–14. http://dx.doi.org/10.1142/s0217979211066842.

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Antibacterial glass mat sheets containing unsaturated polyester resin as a matrix and poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA)-functionalized multi-walled carbon nanotube (MWNT) nanocomposites as a filler were prepared. Controlled functionalization of MWNT by in situ atom transfer radical polymerization (ATRP) of DMAEMA was applied for the preparation of nanocomposites. An antibacterial activity of the prepared unsaturated polyester glass mat sheets was determined by the application of film contact method based on the Japanese Industrial Standard JIS Z-2801. The mechanical properties of the prepared unsaturated polyester glass mat sheets were estimated by the simplified procedure designed in laboratory. A deliberate search for the ATRP process conditions showing the most effective antibacterial activity was tried beyond all experiments.

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Chen, Daqin, Shuo Yuan, Jiangkun Chen, Jiasong Zhong i Xuhui Xu. "Robust CsPbX3 (X = Cl, Br, and I) perovskite quantum dot embedded glasses: nanocrystallization, improved stability and visible full-spectral tunable emissions". Journal of Materials Chemistry C 6, nr 47 (2018): 12864–70. http://dx.doi.org/10.1039/c8tc04786c.

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CsPbX₃ (X = Cl, Br, I and their mixture) QDs@glass nanocomposites are fabricated via a facile in situ glass crystallization strategy, exhibiting full-spectral visible emissions, superior thermal stability and water resistance.

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Kmita, A., i A. Roczniak. "Nanocomposites Based on Water Glass Matrix as a Foundry Binder: Chosen Physicochemical Properties". Archives of Foundry Engineering 17, nr 1 (1.03.2017): 93–98. http://dx.doi.org/10.1515/afe-2017-0017.

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Abstract The nanocomposites based on water glass matrix were attempted in the study. Nanoparticles of ZnO, Al2O3 or MgO in organic solutions were applied into water glass matrix in the amounts of: 1.5; 3; 4 or 5 mas. %. Wettability of the quartz sad by the nanocomposites based on water glass matrix was determined by testing changes of the wetting angle θ in time τ for the system: quartz - binder in non-stationary state, by means of the device for measuring wetting angles. Wettability measurements were carried out under isothermal conditions at an ambient temperature (20 - 25°C). The modification improves wettability of quartz matrix by water glass, which is effective in improving strength properties of hardened moulding sands. Out of the considered modifiers in colloidal solution of propyl alcohol water glass modified by MgO nanoparticles indicated the smallest values of the equilibrium wetting angle θr. This value was equal app. 11 degrees and was smaller no less than 40 degrees than θr value determined for not modified water glass. Viscosity η of nanocomposites based on water glass matrix was determined from the flow curve, it means from the empirically determined dependence of the shearing stress τ on shear rate γ: τ = f (γ) (1), by means of the rotational rheometer. Measurements were carried out at a constant temperature of 20°C. The modification influences the binder viscosity. This influence is conditioned by: amount of the introduced modifier as well as dimensions and kinds of nanoparticles and organic solvents. The viscosity increase of the modified binder does not negatively influence its functional properties.

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Thiagarajan, A., K. Palaniradja, N. Rajesh Mathivanan i M. Naresh. "Analysis of Laminate Configuration on Impact Properties of Glass Fibre Epoxy Nanocomposites". Advanced Materials Research 488-489 (marzec 2012): 686–90. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.686.

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The impact behaviors of glass fibre reinforced/epoxy nanocomposites were studied by experimental using instrumental falling weight testing machine at three different energy levels. Two types of laminates were prepared by hand lay-up method with varying nanoclay into the epoxy in a 1%, 3% and 5%, respectively. The structures of nanocomposites were studied using X-ray diffraction (XRD). It was found that the nanoclay was orderly exfoliated in the epoxy resin. The impact properties of maximum load and energy absorption were determined. It was observed that addition of 3% nanoclay into the epoxy, the maximum load was enhanced by 32% and energy absorption by 24% at the energy level of 24.89J. The impact fractured surface morphology of the glass fibre/epoxy nanocomposites was analyzed using scanning electron microscopy (SEM).

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Zhang, Huan, Dan-Dan Sun, Yi Peng, Jian-Hua Huang i Meng-Bo Luo. "Diffusivity and glass transition of polymer chains in polymer nanocomposites". Physical Chemistry Chemical Physics 21, nr 41 (2019): 23209–16. http://dx.doi.org/10.1039/c9cp04195h.

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Corral Nunez, Camila, Diego Altamirano Gaete, Miguel Maureira, Javier Martin i Cristian Covarrubias. "Nanoparticles of Bioactive Glass Enhance Biodentine Bioactivity on Dental Pulp Stem Cells". Materials 14, nr 10 (20.05.2021): 2684. http://dx.doi.org/10.3390/ma14102684.

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This study aimed to investigate the cytotoxicity and bioactivity of a novel nanocomposite containing nanoparticles of bioactive glass (nBGs) on human dental pulp stem cells (hDPSCs). nBGs were synthesized by the sol–gel method. Biodentine (BD) nanocomposites (nBG/BD) were prepared with 2 and 5% wt of nBG content; unmodified BD and glass ionomer cement were used as references. Cell viability and attachment were evaluated after 3, 7 and 14 days. Odontogenic differentiation was assessed with alkaline phosphatase (ALP) activity after 7 and 14 days of exposure. Cells successfully adhered and proliferated on nBG/BD nanocomposites, cell viability of nanocomposites was comparable with unmodified BD and higher than GIC. nBG/BD nanocomposites were, particularly, more active to promote odontogenic differentiation, expressed as higher ALP activity of hDPSCs after 7 days of exposure, than neat BD or GIC. This novel nanocomposite biomaterial, nBG/BD, allowed hDPSC attachment and proliferation and increased the expression of ALP, upregulated in mineral-producing cells. These findings open opportunities to use nBG/BD in vital pulp therapies.

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Egorova, O. V., i Thant Zin Hein. "Improvement of Mechanical Properties of Polymer Materials by the Nanosized Ceramic Particles". WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS 16 (9.09.2021): 134–41. http://dx.doi.org/10.37394/232011.2021.16.14.

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As a result of the experiments, epoxy nanocomposites based on titanium dioxide nanoparticles in the form of opaque blue-gray films were obtained. The composition and structure of epoxy nanocomposites were studied by scanning electron microscopy and infrared spectroscopy. The properties of the obtained film nanocomposites were investigated to determine the glass transition temperature, and the mechanical properties of the films were tested in tension, where the tensile strength, elastic modulus, and relative deformation were determined

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