Study on the Preparation and Properties of Epoxy/SiO2 Nanocomposite

• Main Authors: Shi-Min Chen, 陳世珉
• Other Authors: Jiang-Jen Lin
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/28667134942270545495

碩士 === 國立中興大學 === 化學工程學系 === 91 === The objectives of this research are to investigate the chemical characterized reaction of nanoparticles silica surface, the morphology of nanoparticles shape, and the flame resistance of epoxy resin based nanocomposite materials. The preparation of the epoxy resin/silica hybrid organic-inorganic nanocomposite is via coupling agent modified silica surface. Effects of nanocomposite structure on the physical and chemical properties were discussed. The coupling agent was used to improve the interface between organic and inorganic phase. The compatible and reactive Si－O bonds of coupling agent and Si－OH bonds of silica surface cause the covalent bonds. The silica network was characterized by solid-state 29Si nuclear magnetic resonance (29Si solid-state NMR). Results revealed that Q4 and T3 are the major environments. The size of silica particle was observed by scanning electron microscope (SEM). The particle size of inorganic silica in the modified-system is less than 100 m. The shape of silica particle was observed by transmittance electron microscope (TEM). The particle size of modified silica is more dispersible than unmodified-system and it is less than 50 nm. The thermal stability of the epoxy resin/silica hybrid nanocomposite was studied using differential scanning galorimeter (DSC) and thermogravimetric analysis (TGA). The modified hybrid composite exhibits similar promising thermal properties. However, mechanical properties show significant difference between the conventional and nanocomposite.