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Gotowa bibliografia na temat „Glass Nano-composites”

Autor: Grafiati

Data publikacji: 7 września 2023

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Artykuły w czasopismach na temat "Glass Nano-composites"

Odermatt, Reto, Matej Par, Dirk Mohn, Daniel B. Wiedemeier, Thomas Attin i Tobias T. Tauböck. "Bioactivity and Physico-Chemical Properties of Dental Composites Functionalized with Nano- vs. Micro-Sized Bioactive Glass". Journal of Clinical Medicine 9, nr 3 (12.03.2020): 772. http://dx.doi.org/10.3390/jcm9030772.

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Bioactive resin composites can contribute to the prevention of secondary caries, which is one of the main reasons for failure of contemporary dental restorations. This study investigated the effect of particle size of bioactive glass 45S5 on chemical and physical composite properties. Four experimental composites were prepared by admixing the following fillers into a commercial flowable composite: (1) 15 wt% of micro-sized bioactive glass, (2) 15 wt% of nano-sized bioactive glass, (3) a combination of micro- (7.5 wt%) and nano-sized (7.5 wt%) bioactive glass, and (4) 15 wt% of micro-sized inert barium glass. Hydroxyapatite precipitation and pH rise in phosphate-buffered saline were evaluated during 28 days. Degree of conversion and Knoop microhardness were measured 24 h after specimen preparation and after 28 days of phosphate-buffered saline immersion. Data were analyzed using non-parametric statistics (Kruskal–Wallis and Wilcoxon tests) at an overall level of significance of 5%. Downsizing the bioactive glass particles from micro- to nano-size considerably improved their capability to increase pH. The effect of nano-sized bioactive glass on degree of conversion and Knoop microhardness was similar to that of micro-sized bioactive glass. Composites containing nano-sized bioactive glass formed a more uniform hydroxyapatite layer after phosphate-buffered saline immersion than composites containing exclusively micro-sized particles. Partial replacement of nano- by micro-sized bioactive glass in the hybrid composite did not impair its reactivity, degree of conversion (p > 0.05), and Knoop microhardness (p > 0.05). It is concluded that downsizing bioactive glass particles to nano-size improves the alkalizing potential of experimental composites with no negative effects on their fundamental properties.

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Rudresh B M, Ravikumar B N, Madhu D i Lingesh B V. "Synergistic Effect of Micro and Nano Fillers on Mechanical and Thermal Behavior of Glass-Basalt Hybrid Nano Composites". International Journal of Surface Engineering and Interdisciplinary Materials Science 7, nr 1 (styczeń 2019): 20–36. http://dx.doi.org/10.4018/ijseims.2019010102.

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This article deals with the combined effect of micro and nano fillers on mechanical, thermal and morphological behavior of glass-basalt hybrid composites (GB). Three material systems were selected for the study: glass-basalt fiber reinforced 80 wt. % PA66 – 20 wt. % PTFE blend (GB), GB/Micro fillers (MoS2, SiC, Al2O3) (GBM) and GBM/nano fillers (TiO2) (GBN). It has been revealed from the experimentation that the effect of micro fillers deteriorated the mechanical behavior of micro composites (GBM). But the combined effect of micro and nano fillers slightly impaired the mechanical behavior of nano composites. The synergistic effect of micro and nano fillers constrained the loss of strength of nano composites. But the impact strength of nano composites has been improved due to hybrid fillers effect. The hybrid effect of fillers significantly improved the thermal stability of nano composites. Further, it is observed from the morphology that the fractured surfaces were characterized by fiber pull out and fiber overlapping, severe deformation and agglomeration of nano particles.

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Desai, Rahul K., Laxmi Tomar i B. S. Chakrabarty. "Comparative Study of PAA/Alumina Composites with PAA/Alumina Nano Composites and Thermal Analysis of PAA/Alumina Nano Composites with Doping of Metals". Solid State Phenomena 209 (listopad 2013): 121–24. http://dx.doi.org/10.4028/www.scientific.net/ssp.209.121.

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The purpose of this work is to provide a comparative study of polyacrylic acid alumina (PAA/Al2O3) bulk composites with PAA/Al2O3 nano composites. This work also provides a study in the variation of glass transition temperature due to the doping of metal. Alumina nano particles were prepared using hydrothermal method. This sample was doped with Cu. Polyacrylic acid alumina nano composites were prepared using two different methods. The alumina samples were added to acrylic acid. In the first method the mixtures of acrylic acid and alumina samples were heated in oven. In the second method the same mixtures were irradiated with microwaves. The samples prepared were allowed to cool down and dried. Also the alumina bulk particles were also dispersed in acrylic acid and the similar procedure was carried out. The effect of preparation methods on the glass transition temperature of PAA/Al2O3 and PAA/Al2O3 nano composites have been studied. The glass transition temperatures Tg were determined using DSC analysis.

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D, Kumar, Kiran Shahapurkar, C. Venkatesh, Muruganandhan R, Vineet Tirth, Chandru Manivannan, Ibrahim M. Alarifi, Manzoore Elahi M. Soudagar i Ahmed S. El-Shafay. "Influence of Graphene Nano Fillers and Carbon Nano Tubes on the Mechanical and Thermal Properties of Hollow Glass Microsphere Epoxy Composites". Processes 10, nr 1 (27.12.2021): 40. http://dx.doi.org/10.3390/pr10010040.

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The present work aimed to analyze the roll of carbon nano tubes and graphene nano fillers on the mechanical and thermal characteristics of hollow glass microsphere reinforced epoxy composites. Composites with varying content of hollow glass microballoons (2, 4, 6, 8, and 10 wt %) reinforced in epoxy matrix were fabricated. Additionally, two more types of composites, one with graphene nano fillers and the other with carbon nano tube at a constant 0.5 wt %, were fabricated with varying weight percentages of hollow glass microballoons (2, 4, 6, 8, and 10%). The composites were fabricated using an open mold casting process. Composites were tested for thermal and mechanical properties. The tensile and flexural moduli were found to rise as the HGM concentration increased. Graphene-filled HGM/epoxy composites revealed the highest modulus compared with HGM/epoxy and HGM/CNT/epoxy composites. The impact strength of all composite types decreased as the HGM content increased. Neat epoxy specimens revealed low response as compared with all the composites tested. Further, the thermal conductivity of HGM/epoxy composites was lower as compared with other compositions and neat epoxy. Scanning electron microscopy was used to analyze the surface morphological behavior of the composites subjected to flexural test. It was found that HGM/G/E composites with 10% of HGM and 0.5% of graphene by weight in epoxy matrix were the optimum.

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Wang, Yong Kun, Li Chen i Zhi Wei Xu. "Effect of Various Nanoparticles on Friction and Wear Properties of Glass Fiber Reinforced Epoxy Composites". Advanced Materials Research 150-151 (październik 2010): 1106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1106.

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The glass fiber (GF) reinforced epoxy (EP) composites filled by nano-Al2O3, nano-TiO2, nano-SiO2 and multi-walled carbon nanotubes (MWCNTs) were prepared. The friction and wear behavior of composites under dry condition were evaluated with block-on-ring friction and wear tester. The morphologies of the worn surfaces of the composites were analyzed by scanning electric microscopy (SEM). The results show that 0.5 wt% MWCNTs and nano-TiO2 can significantly lower the friction coefficient and specific wear rate of composites, respectively, while 0.5 wt% nano-SiO2 and nano-Al2O3 can slightly lower the friction coefficient and specific wear rate of the composites.

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Calin, Mariana, Jürgen Eckert i Ludwig Schultz. "High-strength Cu–Ti-rich bulk metallic glasses and nano-composites". International Journal of Materials Research 94, nr 5 (1.05.2003): 615–20. http://dx.doi.org/10.1515/ijmr-2003-0107.

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Abstract Cu47Ti34Zr11Ni8, Cu47Ti33Zr11Ni8Fe1 and Cu47Ti33Zr11Ni8Si1 bulk glassy alloys were prepared by injection copper mold casting. Mechanical properties, glass-forming ability, thermal stability and microstructural characteristics of as-cast rods were investigated. Calorimetric studies indicate a beneficial role of small Si or Fe addition on the thermal stability of Cu–Ti – Zr –Ni bulk glassy alloys. Compression tests reveal fracture strengths of 2040 to 2190 MPa, Young’s moduli of 100 to 109 GPa and elastic strains up to 2.4 %. The Si-containing glassy alloy exhibits a plastic elongation of 2.2%. The significant increase in plasticity observed for the Si-containing alloy is due to a special bimodal composite structure consisting of nano-scaled Cu crystals homogeneously dispersed in the bulk metallic glass matrix. The increase of the global plasticity can be explained by the formation of multiple shear bands that make the glassy alloy resistant to crack propagation.

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YARLAGADDAA, Jyothhi, i Ramakrishna MALKAPURAM. "Influence of carbon nanotubes/ graphene nanoparticles on the mechanical and morphological properties of glass woven fabric epoxy composites". INCAS BULLETIN 12, nr 4 (4.12.2020): 209–18. http://dx.doi.org/10.13111/2066-8201.2020.12.4.19.

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An epoxy matrix reinforced with multi-walled carbon nanotubes (MWCNTs) and graphene nano particles (GNPs) is used to fabricate woven glass fabric epoxy composites using Hand Layup and compression moulding technique. Three types of composites are fabricated using 7-mill plain weave glass fabric, +45o/-45o, 0o-90o multi axial glass woven fabrics as reinforcements and epoxy as matrix. Mechanical characterization is performed on the fabricated composites.0o-90o GWFE composites are fabricated with 0.5 wt%, 1.5 wt% MWCNTs, and 0.5 wt%, 1.5 wt% graphene nano particles (GNPs).The results from mechanical and morphological characterization revealed that specimens containing 0.5 wt%, 1.5 wt% MWCNTs, and 0.5wt %, 1.5 wt% graphene nanoparticles (GNPs) are altered when compared to the glass woven fabric epoxy composites without nanoparticles. Glass woven fabric epoxy (GWFE) composites with 1.5 wt% of MWCNT possess the highest hardness of 90.33 which is 6.27% greater when compared to other composites. The tensile strength of composite specimens containing 1.5 wt% graphene nanoparticles (GNPs) increased by 14.5% over glass woven fabric epoxy (GWFE) composites. The mode of fiber failure in tensile fractured surfaces of GWFE composites is apprised through SEM images.

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Korkmaz, Y., S. Gurgan, E. Firat i D. Nathanson. "Shear Bond Strength of Three Different Nano-Restorative Materials to Dentin". Operative Dentistry 35, nr 1 (1.01.2010): 50–57. http://dx.doi.org/10.2341/09-051-l.

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Clinical Relevance Nano glass ionomer exhibited significantly lower shear bond strength compared to nano-composites. The self-etch adhesive showed higher shear bond strength than etch&rinse adhesive for both nanofill and flowable nanofill composites.

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Yang, Jinshui, Chunqi Wang, Jingcheng Zeng i Dazhi Jiang. "Effects of nano-SiO2 on mechanical and hygric behaviors of glass fiber reinforced epoxy composites". Science and Engineering of Composite Materials 25, nr 2 (28.03.2018): 253–59. http://dx.doi.org/10.1515/secm-2014-0470.

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AbstractThe unmodified and nano-SiO2modified glass fiber reinforced polymer (GFRP) composites were prepared by the hot-compression molding process to investigate the effects of nano-SiO2on the mechanical and hygric properties of the GFRP composites. The results indicate that the nano-SiO2modification results in an increase of 9.7% and 7.9% in the tensile and flexural strength of the GFRP composites, and a decrease of 10.6% in the interlaminar shear strength (ILSS). The maximum swelling of the unmodified GFRP is 2.6 times as that of the nano-SiO2modified GFRP. The normalized-ILSS decrease of the nano-SiO2modified GFRP is only 12% after 138 days aging, while that of the GFRP reaches 31%. After 95-days hygric-aging, the decrease of the normalized flexural strength is 15.3% for the GFRP, while the normalized flexural strength of the nano-SiO2modified GFRP still maintains an increase of 5.0%. It is concluded that the nano-SiO2particle could improve the mechanical and hygric properties of the GFRP composites.

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Alavi, Fatemeh, i Ali Ashrafi. "Mechanical Properties of Glass–Fiber Polyester Reinforced Composites Filled with Nanometer Al₂O₃ Particles". Advanced Materials Research 586 (listopad 2012): 199–205. http://dx.doi.org/10.4028/www.scientific.net/amr.586.199.

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In this research the effects of the nano-particle additions and two different fabric architectures of knitted E-glass fibers on the mechanical properties of polyester fiberglass composites were investigated. The particles selected was 50 nanometer in size Al2O3 particles. E-glass fibers were knitted using two different molds by two different arrangements. Specimens were machined and mechanical tests were conducted as per the accepted test standard. Tension, impact and fracture properties were measured and their associated failure modes were compared with each other. Fracture behavior of specimens with and without nano-particle addition in unidirectional tensile test was studied using Scanning Electron Microscopy (SEM). Results obtained showed that tensile strength of the composite is significantly dependent on nano-particle addition and E-glass fiber architecture. Addition of 0.2 weight percent nano-particles enhances the tensile properties of polyester fiberglass composites. It was found that fracture behavior of composite depends strongly on nano-particle addition.

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Rozprawy doktorskie na temat "Glass Nano-composites"

Gunduz, Huseyin Ozgur. "Flame Retardancy Of Polyamide Compounds And Micro/nano Composites". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610668/index.pdf.

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In the first part of this dissertation, glass fiber reinforced/unreinforced polyamide 6 (PA6) and polyamide 66 (PA66) were compounded with three different flame retardants, which were melamine cyanurate, red phosphorus and brominated epoxy with antimony trioxide, by using an industrial scale twin screw extruder. Then, to investigate flame retardancy of these specimens, UL-94, Limiting Oxygen Index (LOI) and Mass Loss Cone Calorimeter (MLC) tests were carried out. In addition to flammability tests, thermogravimetric analysis (TGA) and tensile testing were performed. Results of the tensile tests were evaluated by relating them with fiber length distributions and fracture surface morphologies under scanning electron microscope (SEM). Incorporation of melamine cyanurate (MCA) to PA6 led to some increase in LOI value and minor reductions in Peak Heat Release Rate (PHRR) value. However, it failed to improve UL-94 rating. Moreover, poor compatibility of MCA with PA6 matrix caused significant reductions in tensile strength. Brominated epoxy in combination with antimony trioxide (Br/Sb) was compounded with both glass fiber reinforced PA6 and PA66. Br/Sb synergism was found to impart excellent flammability reductions in LOI value and UL-94 as V-0 rating. Effectiveness of Br/Sb flame retardant was also proven by the MLC measurements, which showed excessive reductions in PHRR and Total Heat Evolved (THE) values. On the other hand, Br/Sb shifted the degradation temperature 100°
C lower and decreased the tensile strength value, due to poor fiber-matrix adhesion and decreased fiber lengths. Red phosphorus (RP), when introduced to glass fiber reinforced PA66 induced V-0 rating in UL-94 together with significant increase in LOI value, and major decrease in PHRR. Degradation temperature was 20°
C lower while mechanical properties were kept at acceptable values compared to neat glass fiber reinforced PA66. In the second part of this dissertation, to investigate synergistic flame retardancy of nanoclays
glass fiber reinforced PA6 was compounded by certain nanoclay and an organo-phosphorus flame retardant (OP), which contains aluminum phosphinate, melamine polyphosphate and zinc borate, in a laboratory scale twin screw extruder. Exfoliated clay structure of the nanocomposites was assessed by X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM), while thermal stability and combustion behaviors were evaluated by TGA, LOI, UL-94 and MLC. Replacement of a certain fraction of the flame retardant with nanoclay was found to significantly reduce PHRR and THE values, and delay the ignition. Moreover, remarkable improvements were obtained in LOI values along with maintained UL-94 ratings. Residue characterization by ATR-FTIR and SEM ascribed the enhanced flame retardancy of nanocomposite specimens to the formation of a glassy boron-aluminum phosphate barrier reinforced by clay layers at the nanoscale.

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Ravarian, Roya. "The Effect of Nano-Scale Interaction on the Physico-Chemical Properties of Polymer-Bioactive Glass Composites". Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10147.

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Polymer-bioglass composites are favourable materials for bone repair. However, early failure in the interface of components is a common problem in physical mixtures. The aim of this project was to address the issue of phase separation by creating a hybrid material in which the polymer is bonded to bioglass. Synthetic non-biodegradable poly(methyl methacrylate) (PMMA) and natural biodegradable chitosan were selected as two types of polymers for fabrication of hybrid with bioglass. PMMA and chitosan were functionalised with appropriate silane coupling agents and covalently bonded to bioglass. The polymer and bioglass were then co-condensed during sol-gel method to form hybrid. The results of molecular scale analyses demonstrated that at optimum condition (0.1 coupling agent:MMA mol ratio, 60:40 vol% polymer:bioglass), the covalent bond between PMMA and bioglass occurred and resulted in the fabrication of hybrid. The presence of nano-scale interaction resulted in improved physico-chemical and biological properties compared with physical mixtures and bioglass. Furthermore, by manipulating process parameters such as replacing tetrahydrofuran with ethanol, increasing the temperature to 70 °C and adding sodium bicarbonate as catalyst, the gelation time was reduced and a more condensed structure was produced. The chitosan-bioglass hybrid was optimized for the volume ratio of chitosan:bioglass and coupling agent. Furthermore, a new method was developed for the creation of porosity in polymer-bioglass composites in which sodium bicarbonate was used as a gas foaming agent and a biocompatible alternative for the commonly used hydrofluoric acid during sol-gel method. In conclusion, the presence of nano-scale interaction significantly improved the physico-chemical properties of polymer-bioglass hybrids via promoting the homogenous distribution of phases. These hybrids open an avenue for the applications of polymers-bioglass composites for bone replacement and tissue engineering.

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Mabrouk, Mohamed Mostafa. "Preparation of PVA / Bioactive Glass nanocomposite scaffolds : in vitro studies for applications as biomaterials : association with active molecule". Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S063/document.

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Le Poly Vinyl Alcohol (PVA) a été associé aux verres élaborés dans un système quaternaire (BG) 46S6 par les procédés cités (fusion, sol-gel et sacffolds). Différents paramètres intervenant dans les synthèses des verres bioactifs ont été étudiés, nous citons à titre d’exemple : la température, le pH, la taille des particules, le rapport Polymère / verres, la microstructure, la porosité et la biodégradation. Les caractéristiques thermiques des verres élaborés ont été également déterminées après chaque synthèse par analyse thermique différentielle (DSC/TG, DTA/TG). Ainsi, la température de fusion, la température de transition vitreuse et la température de cristallisation ont été élucidées. Ces caractéristiques thermiques changent lorsque la composition chimique du verre est modifiée. A ce titre, les compositions chimiques ont été étudiées par Fluorescence (XRF) et Inductively Coupled Plasma-Opticale Emission Spectroscopy (ICP-OES) après chaque synthèse pour s’assurer de la pureté des verres bioactifs élaborés et destinés à des applications médicales. Plusieurs techniques physico chimiques d’analyses (DRX, MEB, MET, FT-IR, XRF, ICPOES) ont été mises en oeuvre pour déterminer les propriétés physico chimiques de nos verres bioactifs avant et après expérimentations « in vitro ». Le nano composite Polymère-Verres scaffolds que nous avons obtenu présente des particules de tailles comprises entre 40 et 61 nm et une porosité d’environ 85%. La biodégradation des verres scaffolds décroît lorsque la teneur en verre scaffolds dans le nano composite croît. Les expérimentations « in vitro » montrent qu’après immersion de ces nano composites dans un liquide physiologique synthétique (SBF), une couche d’apatite (phosphate de calcium) se forme à leur surface. L’épaisseur de la couche formée dépend clairement de la taille des particules et du rapport polymère / verre scaffolds
The aim of the present work is the preparation of Bioactive Glass (BG) 46S6 by different techniques. Fabrication of composite scaffolds by using of Poly Vinyl Alcohol (PVA) and quaternary BG (two methods melting and sol-gel) with different ratios to the prepared scaffolds was carried out. Different factor affecting the final properties of the prepared composite scaffolds were investigated in this study, such as; temperature of treatment, BG particle size, polymer/glass ratio, microstructure, porosity, biodegradation, bioactivity, and drug release. The thermal behavior of the prepared bioactive glass by sol-gel and melting techniques were identified using Differential Scanning Calorimetric/Thermo Gravimetric (DSC/TG) or Differential Thermal Analysis/Thermo Gravimetric (DTA /TG). The elemental composition of the prepared bioactive glasses was determined by X-rays Fluorescence (XRF) to confirm that the prepared bioactive glasses have the same elemental compositions and high purity for biomedical applications. The particle size of the prepared bioactive glass was determined by Transmission Electron Microscopic (TEM). Nano-bioactive glass could be obtained by modified sol-gel and the obtained particle size ranged between 40 to 61 nm. The prepared bioactive glass by both applied methods has the same amorphous phase and all identified groups as well as. The porous scaffold has 85% porosity with a slight decrease by increasing the glass contents. The degradation rate decreased by increasing of glass content in the prepared scaffolds. The bioactivity of the prepared composite scaffolds was evaluated by XRD, FTIR, SEM coupled with EDX and Inductively Coupled Plasma-Optical Emission Spectroscopic (ICP-OES). It has been observed that after soaking in Simulated Body Fluid (SBF), there was an apatite layer formed on the surface of the prepared samples with different thickness depending on the glass particle size and polymer/glass ratio

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秦承平. "The Effects of Addition Nano-silica on Impact property of Glass Woven Composites". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/64503357898214035684.

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碩士
逢甲大學
纖維與複合材料學系
104
In this study, the use of nano-silica on bisphenol A epoxy resin to toughen and prepare different nano silica content of the modified resin system. Then hand laminated prepared a quantitative basis weight and fiber content of the prepreg resin material. By using differential scanning thermal analyzer (DSC) and rheometer find hardening resin systems and processing conditions of temperature and then to a hot press method to make glass fiber cloth laminate. And its effect of different proportions of nano-silica glass transition temperature of the substrate of the position (Tg) and viscosity, followed by use of materials testing machine to test the toughness of DCB destroy Discussion (Double Cantilever Beam test) and impact properties, and finally and SEM image of fracture surface were analyzed after the DCB test. The results show: glass transition temperature of the resin material in position 118 ± 2 °c, not by the addition of various amounts of nano silica caused significant impact; fig SEM observation of fracture surface from DCB test after the damage occurred during discovery crack path deflection, crack pinning, micro-cracks and peeling failure mechanism proved to add nano-silica composites can absorb leaving more destructive energy, when the silica content is 6wt% when, GIC will be from 0.56 kJ / m2 upgraded to 1.05kJ / m2. Increased by 46.67%; impact damage from 40.14 kJ / m2 increased to 51.27 kJ / m2, increased by 27.73%.

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Yeu-Li, Lee, i 李宇立. "Nano-silica Toughening Epoxy Resin and Effect on the Glass Fabric Reinforced Composites". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/31871048416110264397.

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碩士
逢甲大學
纖維與複合材料學系
102
An optimized synthesis of nanometer silica particles by sol-gel method take advantage of Tetraethoxysilane (TEOS). Preparation of nano-silica / epoxy mixed solution thorugh ultrasonication and mechanical agitation. Using differential scanning calorimetry (DSC) to explore the effect of different nano-silica added proportions on glass transition temperature (Tg) of resin system. Glass fabric/nano-silica/epoxy composite laminates made by hand lay-up and hot pressing method. The purpose of this study is to evaluate the reinforced role of nano-silica on the mechanical properties and the interlaminar fracture behaviour of fibre reinforced toughened epoxy. Flexural test, short-beam test and fracture toughness test (Double Cantilever Beam test) were performed to evaluate mechanical performance. Based on the experimental results showed that glass transition temperature (Tg) of resin system does not significantly influenced by adding with different amounts of nano-silica. Flexural strength and flexural modulus increased with increasing of nano-silica added amounts. The flexural strength and flexural modulus of the composites enhance 9.98% and 13.74%, respectively, with silica particles added 8 wt.% loading. Compared to the neat epoxy, the interlaminar shear strength of silica composites increased of 16.31% for 12 wt.% silica loading. The mode I fracture toughness of laminates also exhibt increased with increasing of nano-silica weight fraction. The GIC value enhance 55.7% with adding 12 wt.% nano-silica weight fraction. According to observ the photos of SEM after DCB tested specimen showed that including crack pinning, crack deflection, particle pull-up and microcracks etc. failure modes on the fracture surface. It demonstrates the composite materials could absorb more energy and causes the GIC increased when added nano-silica into epoxy system.

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Kumar, Ashwani. "Molecular Dynamics Simulation of Nano-indentation Studies on Zr-based Metallic Glass Matrix Composites". Thesis, 2015. http://ethesis.nitrkl.ac.in/6730/1/Ashwani_Kumar__M.Tech_2015.pdf.

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In the present investigation molecular dynamics (MD) simulations of nano-indentation on Zr50Cu50, Zr50Cu30Al20 metallic glasses (MGs) and Zr50Cu50, Zr50Cu30Al20 glass matrix composites (GMCs) with 14%, 30% and 50% crystalline volume fraction have been studied. Nano-indentation tests are conducted at varying strain rates (2.5 × 109 s-1, 2.5× 1010 s-1, 1.25 × 1011 s-1 and 2.5 × 1011 s-1) and temperatures (100K, 300K and 500K) to investigate the deformation behaviour and response on the mechanical properties such as yield point, maximum load, and hardness through load-displacement plots. Also, the effect of crystallite distribution (single-spherical and multi-spherical) and shape (spherical and cylindrical) on the load-displacement response have been studied. Structural analysis during deformation has been done by centro-symmetry parameter (CSP) studies. It is found that all curves have linear elastic behaviour and non-linear plastic behaviour with load varying linearly with displacement of the indenter following Hertz’s contact theory in the elastic region. After the first “pop in” or initiation of plastic deformation, serrations are observed to be irregularly spaced in amorphous alloys because of their short range order arrangement of atoms. With compared to that of MGs. This may be due to delay in load transfer from amorphous phase to crystallites which can be observed in the atomic position snapshots of CSP studies. The increase of temperature leads to the decrease in the yield point and maximum loads in MG and GMCs. This may be due to the fact that atoms are displaced far away and so the interatomic interaction force decreases causing softening of the alloy. Studies on the effect of crystallite distribution show that single-crystallite (14%) reinforced composite exhibits higher strength as compared to multi-spherical crystallite composite (14%). Also, studies on the shape of the crystallite reveal that composite reinforced with cylindrical shaped crystallites (14%) offer better strength than that of the composite with spherical crystallites (14%). From this study, it can be concluded that GMCs have better strength compared to MGs. Zr50Cu50 with 30 % crystalline volume fraction has better strength and in case of Zr50Cu30Al20 GMC with 50% crystalline volume fraction exhibits superior properties.

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Yang, Huei-Jen, i 楊蕙禎. "Hydrophilic PU Nano-composites for the Treatments of Long-Lasting Anti-fogging Glass and Breathable Textile". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/k2n5as.

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碩士
淡江大學
化學學系碩士班
102
This research has been developed a series of hydrophilic PU resin materials for the treatments of anti-fogging glass and hydrophilic PET textile, respectively. Anti-fogging Glass: A PEG-1000 containing NCO-terminated PU prepolymer is prepared and it reacted further with 3-aminopropyl triethoxy-silane, APTES (consists silane and amino function group), and a silane-terminated PU oligomer is resulted after TBT (for nano-TiO2 via sol-gel process) is added at pH=5 for 65 oC/6 hr. A silane-terminated hydrophilic PU oligomer is applied on an anti-fogging glass. The glass anti-fog effect will stand for more than 10 minutes and also remain excellent adhesion (cross-cut passes 4 B) after dipping in boiling water for 10minutes or in alcohol for 1 hr . Hydrophilic Textile treatment: A mixture of nano-TiO2 (TBT via sol-gel process) and hydrophilic (PEG-1000) group-containing UV-curable aqueous PU resin(UV-WPU) has been prepared for breathable textile treatment. A PET textile has been treated with UV-WPU by dipping process and then cured by UV-radiation. A hydrophilic PET textile has resulted and that demonstrated by its water diffusion area and water absorption. And PET textile still is hydrophilic after 20 water washing cycles (AATCC method). Due to UV-curing process creates IPN (interpenetrating polymeric networks) of hydrophilic UV-WPU between textile fibers that enhancing water washing durability.

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HSIAO, CHIA-FAN, i 蕭家帆. "Effect of Adding Chain Extending Agent and Nano-silica on Toughening of Glass Fabric Reinforced Epoxy Resin Composites". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/u3cx62.

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碩士
逢甲大學
纖維與複合材料學系
105
Epoxy resin was brittle after hardening into a three-dimensional network structure. The force would produce cracks, and growth rapidly. So it need to improve the toughness and mechanical properties by modification. In this time, the epoxy resin was modified by adding chain extending agent and different proportions of nano-silica. And using DSC to examine the effect of modifiers on the glass transition temperature (Tg). The mechanical properties of epoxy resin /glass fabric composite laminate were investigated by Mode I fracture toughness, Mode II fracture toughness, flexural properties and interlaminar shear strength (ILSS). The Zeta Potential Analyzer was used to understand the different of nano- silica’s particle size. And the Field Emission Emission Scanning Electron Microscope (FE-SEM) to observe the failure morphology on the fracture surface of after fracture toughness test. With the high speed mixer and three-roll miller which can reduce the phenomenon of nano-silica agglomeration. Based on the DSC determined showed that glass transition temperature of cured resin system decreased with increasing of the chain extending agent. Because the soft chain caused by the increase in free volume. And when the nano-silica added in to the resin system, it would increasing the glass transition temperature. The flexure properties and ILSS all showed the same trend like glass transition temperature. The Mode I and Mode II fracture toughness of laminate enhance 55.7 % and 47 % with content 5 wt% of chain extending agent and 8 wt% of nano-silica. According to the FE-SEM observation found that with the increase of toughening agent, the broke section would become roughly.

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Majhi, Koushik. "Transparent Glass Nono/Microcrystal Composites In MO-Bi2O3-B2O3(M= Sr, Ca) System And Their Physical Properties". Thesis, 2009. https://etd.iisc.ac.in/handle/2005/1062.

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Transparent glass-ceramics have been of industrial interest because of their multifarious applications. These are becoming increasingly important because of the flexibility that is associated with this route of fabricating intricate sizes and shapes as per the requirement. A number of glass-ceramics, based on well known ferroelectric crystalline phases (LiNbO3, LaBGeO5, SrBi2Nb2O9, Bi2WO6 etc.) were fabricated and their polar and electro-optic properties were reported. Keeping the potential applications of transparent glass-nano/microcrystal composites in view, attempts were made to fabricate SrBi2B2O7 and CaBi2B2O7 glasses and glass-nano/microcrystal composites. An attempt has been made to employ strontium bismuth borate SrBi2B2O7 (SBBO) as a reactive host glass matrix for growing the nanocrystals of ferroelectric oxides belonging to the Aurivillius family. The in situ nucleation and growth of SrBi2Nb2O9 (SBN) nanocrystals in a reactive SrBi2B2O7-Nb2O5 system and its influence on various physical (dielectric, pyroelectric and optical) properties were investigated. The strategy has been to visualize the formation of nanocrystalline SrBi2Nb2O9 as a result of the simple chemical reaction between glassy SrBi2B2O7 and Nb2O5. Indeed at lower concentrations of Nb2O5 transparent glasses were obtained which upon heat-treatment at appropriate temperatures yielded nanocrystalline SrBi2Nb2O9 phase in a transparent glass matrix. Textured SrBi2Nb2O9 ceramics were obtained by quenching the melts of SrBi2B2O7-Nb2O5 in equimolar ratio and their physical properties were studied. A strong anisotropy in physical properties (which are akin to single crystals) were demonstrated in the textured ceramics.

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Majhi, Koushik. "Transparent Glass Nono/Microcrystal Composites In MO-Bi2O3-B2O3(M= Sr, Ca) System And Their Physical Properties". Thesis, 2009. http://hdl.handle.net/2005/1062.

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Książki na temat "Glass Nano-composites"

Šesták, Jaroslav. Thermal analysis of Micro, Nano- and Non-Crystalline Materials: Transformation, Crystallization, Kinetics and Thermodynamics. Dordrecht: Springer Netherlands, 2013.

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(Editor), Klaus Friedrich, Stoyko Fakirov (Editor) i Zhong Zhang (Editor), red. Polymer Composites: From Nano- to Macro-Scale. Springer, 2005.

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Części książek na temat "Glass Nano-composites"

Kakisawa, Hideki, Kazumi Minagawa, Susumu Takamori i Yoshiaki Osawa. "Fabrication of Nano-Laminar Glass/Metal Composites by Sintering Glass Flakes". W THERMEC 2006, 883–88. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.883.

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Anbuchezhiyan, G., B. Mohan i T. Muthuramalingam. "Synthesis and Characterization of Nano-Glass Particles Reinforced AZ91D Magnesium Alloy Composites". W Lecture Notes in Mechanical Engineering, 39–45. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1780-4_5.

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Mohan, K., T. Rajmohan i R. Prasath. "Effect of MWCNT on Mechanical Properties of Glass-Jute Fiber Reinforced Nano Composites". W Springer Proceedings in Materials, 549–60. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6267-9_62.

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Brochu, M., B. D. Gauntt, R. Shah i R. E. Loehman. "Comparison Between Micrometer- and Nano-Scale Glass Composites for Sealing Solid Oxide Fuel Cells". W Progress in Nanotechnology, 237–43. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9780470588260.ch35.

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Bonfoh, Napo, Rodrigue Matadi Boumbimba, Gbèssiho Kinvi-Dossou i Mamadou Coulibaly. "Impact Behaviour and Damage Analysis of Laminated Composites Made of Glass Fibres/Nano-Reinforced Thermoplastic Matrix". W Data-Driven Modeling for Sustainable Engineering, 325–34. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13697-0_24.

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Nayak, Ramesh Kumar. "Effect of Nano-TiO2 Particles on Mechanical Properties of Hydrothermal Aged Glass Fiber Reinforced Polymer Composites". W Advanced Research in Nanosciences for Water Technology, 69–93. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02381-2_4.

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Prasad, T., Barmavatu Praveen, Yalagandala Akshay Kumar i Kunchala Krishna. "Development of Carbon and Glass Fiber-Reinforced Composites with the Addition of Nano-Egg-Shell Powder". W Lecture Notes in Mechanical Engineering, 569–77. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7282-8_42.

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Shen, Shirley Zhiqi, Stuart Bateman, Qiang Yuan, Mel Dell'Olio, Januar Gotama i Dong Yang Wu. "Thermal Properties and Fire Performance of Woven Glass Fibre Reinforced Nylon 6 Nano-Composites with Carbon Nanotubes". W Frontiers in Materials Science and Technology, 9–12. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-475-8.9.

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Gupta, Mahender Kumar, I. Abdul Rasheed i M. Buchi Suresh. "Advances in Nano-finishing of Optical Glasses and Glass Ceramics". W Handbook of Advanced Ceramics and Composites, 569–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-16347-1_17.

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Suresh, M. Buchi, I. A. Rasheed i Mahender Kumar Gupta. "Advances in Nano-finishing of Optical Glasses and Glass Ceramics". W Handbook of Advanced Ceramics and Composites, 1–31. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-73255-8_17-1.

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Streszczenia konferencji na temat "Glass Nano-composites"

Surya, D. P., A. M. Munirah, S. S. Alamelu, J. C. H. Lau i J. Wei. "Mechanical and Thermal Properties of Jute-Glass Fiber Reinforced Nano Composites". W ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86633.

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The rising concern towards environmental issues and lower production costs has led to increasing interests on the use of natural fibers to replace glass fibers as reinforcements. In this paper, the mechanical and physical properties of natural fiber composites and their hybrids or sandwiches were investigated. Jute woven fabric composites and their sandwiches were produced by applying vacuum assisted resin transfer molding (VARTM). For the composite sandwiches, glass woven composites were placed at the outer surfaces of jute woven composites and could act as strong skins. Therefore, the bending properties of jute-glass woven composites are higher than those of jute woven composites. The thin glass woven composites at the outer layer of composite sandwich also reduce the rate of water absorbed by the composites. The water absorption in jute-glass woven composites is lower than those in jute woven composites. Nano fillers that were added into the composites were expected to improve the mechanical and thermal properties of the composites. So far, matrices with 1 wt% of nano fillers have been successfully infused into fibers through VARTM process. The thermal properties of glass woven composites with nano fillers are significantly increased. However, the addition of nano fillers in jute fiber composites does not increase their thermal properties as the decomposition of the natural fiber occurs at the temperature whereby the epoxy matrix starts to degrade.

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Kallagunta, Harish, i Jitendra Tate. "Nano-Ceramic Modified Polymer Matrix Glass Composites for Impact Applications". W SAMPE 2019 - Charlotte, NC. SAMPE, 2019. http://dx.doi.org/10.33599/nasampe/s.19.1578.

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Francis, P. Martin, i T. Sunil Jose. "Effect of zeolite on glass fibre reinforced cyanate ester nano composites". W PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5130309.

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Rajmohan, T., U. K. Koundinya, A. Arun Premnath i G. Harish. "Evaluation of mechanical properties of nano filled glass fiber reinforced composites". W 2013 International Conference on Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET). IEEE, 2013. http://dx.doi.org/10.1109/icanmeet.2013.6609247.

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Husenkhan, Dawalappa B., T. Sankarappa, Amarkumar Malge, J. S. Ashwajeet i T. Sujatha. "Electrical transport studies in vanado-zinc-boro-phosphate glass nano composites". W ADVANCES IN BASIC SCIENCE (ICABS 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5122407.

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CHOUDHURY, PANNALAL, SUBHANKAR DAS i SUDIPTA HALDER. "Micromechanical Modeming of Hybrid Glass Fiber Laminated Composites Added with Graphene Nano Platelets". W American Society for Composites 2020. Lancaster, PA: DEStech Publications, Inc., 2020. http://dx.doi.org/10.12783/asc35/34935.

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Unki, Hanamantappa Ningappa, H. K. Shivanand i H. N. Vidyasagar. "Investigation of mechanical properties of hemp/glass fiber reinforced nano clay hybrid composites". W ADVANCES IN MECHANICAL DESIGN, MATERIALS AND MANUFACTURE: Proceedings of the First International Conference on Design, Materials and Manufacture (ICDEM 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5029690.

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Batra, Uma, Seema Kapoor, J. D. Sharma, S. K. Tripathi, Keya Dharamvir, Ranjan Kumar i G. S. S. Saini. "Nano-Hydroxyapatite∕Fluoridated and Unfluoridated Bioactive Glass Composites: Structural Analysis and Bioactivity Evaluation". W INTERNATIONAL CONFERENCE ON ADVANCES IN CONDENSED AND NANO MATERIALS (ICACNM-2011). AIP, 2011. http://dx.doi.org/10.1063/1.3653714.

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Ali, Sarim, Zhang Boming i Wang Changchun. "Mechanical characterization of glass/epoxy polymer composites sprayed with vapor grown carbon nano fibers". W 2014 11th International Bhurban Conference on Applied Sciences and Technology (IBCAST). IEEE, 2014. http://dx.doi.org/10.1109/ibcast.2014.6778120.

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Jeyakumar, R., R. Ramamoorthi, K. Balasubramanian i R. Madhubalan. "Study the mechanical behaviour of banana fiber/glass fiber reinforced polyester nano clay composites". W Proceeding of 2nd International Colloquium on Computational & Experimental Mechanics (ICCEM 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0108181.

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