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首页> 外文会议>International Conference on Material Science and Engineering Technology >Mechanical and Thermal Properties of Epoxy Composites Containing Amine-Modified Silica Nanoparticles
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Mechanical and Thermal Properties of Epoxy Composites Containing Amine-Modified Silica Nanoparticles

机译：含胺改性二氧化硅纳米粒子的环氧复合材料的机械和热性能

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摘要

Epoxy/silica composites were prepared using aminopropyl triethoxysilane (APTES)-modified silica nanoparticles in the sol state. Different sizes of silica particles were synthesized and they were applied into the epoxy/silica composites with different compositions. The mechanical and thermal properties of the composites were investigated and compared with those of pristine epoxy composite. The structure and morphology of the modified silica nanoparticles and epoxy/silica composites were analyzed using field emission scanning electron microscope. The flexural modulus and tensile strength of the epoxy/silica composites were investigated by universal test machine (UTM). Also, glass transition and thermal stability were investigated using thermomechanical analyzer (TMA). Sizes of silica particles in sol state were controlled by using different concentration of the accelerator. The tensile strength of epoxy/silica composites containing 20 wt% of 30 nm silica was found to be 37.98 MPa. In addition, the glass transition temperature (T_g) decreased with increasing silica particle sizes.
机译：在溶胶状态下使用氨基丙基三乙氧基硅烷（Aptes）制备二氧化硅纳米粒子制备环氧/二氧化硅复合材料。合成不同尺寸的二氧化硅颗粒，用不同的组合物施加到环氧/二氧化硅复合材料中。研究了复合材料的机械和热性能，并与原始环氧复合材料的机械和热性能进行了比较。使用现场发射扫描电子显微镜分析改性二氧化硅纳米粒子和环氧树脂/二氧化硅复合材料的结构和形态。通过通用试验机（UTM）研究了环氧/二氧化硅复合材料的挠曲模量和拉伸强度。此外，使用热机械分析仪（TMA）研究了玻璃化转变和热稳定性。通过使用不同浓度的促进剂来控制溶胶状态中的二氧化硅颗粒的大小。发现含有20wt％30nm二氧化硅的环氧/二氧化硅复合材料的拉伸强度为37.98MPa。另外，玻璃化转变温度（T_g）随着硅粒子尺寸的增加而降低。

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