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首页> 外文期刊>Polymer Composites >Effect of vapor-grown carbon nanofibers and in situ hydrolyzed silica on the mechanical and shape memory properties of water-borne epoxy composites
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Effect of vapor-grown carbon nanofibers and in situ hydrolyzed silica on the mechanical and shape memory properties of water-borne epoxy composites

机译：气相生长碳纳米纤维和原位水解二氧化硅对水性环氧复合材料力学和形状记忆性能的影响

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摘要

Vapor-grown carbon nanofiber (VGCNF)/water-borne epoxy (WEP) and SiO2/WEP composites were successfully synthesized via freeze drying and hot-press molding. VGCNFs were mixed directly with a WEP emulsion, while SiO2 was synthesized by in situ hydrolysis of TEOS solution (3-triethoxysilylpropylamine (KH550): tetraethoxysilane (TEOS): absolute ethanol=1:5:20, w/w/w) dispersed in the WEP emulsion. WEP composites were obtained from these mixtures by freeze drying and compressing under a pressure of 10 MPa at 120 degrees C for 2 h. The morphology and mechanical properties of the WEP composites were investigated by transmission electron microscopy, scanning electron microscopy, dynamic mechanical analysis and tensile testing. The shape memory (SM) properties of the WEP composites were evaluated by fold-deploy SM testing. The effects of filler content and recovery temperature on the SM properties were revealed through systematic variation. The results confirmed that VGCNF and in situ hydrolyzed SiO2 were homogenously dispersed and incorporated into the WEP matrices. Thus, significant improvements in the mechanical and SM properties of the composites were achieved. POLYM. COMPOS., 36:1712-1720, 2015. (c) 2014 Society of Plastics Engineers
机译：通过冷冻干燥和热压成型成功地合成了气相生长的碳纳米纤维（VGCNF）/水性环氧树脂（WEP）和SiO2 / WEP复合材料。 VGCNFs直接与WEP乳液混合，同时通过原位水解TEOS溶液（3-三乙氧基甲硅烷基丙胺（KH550）：四乙氧基硅烷（TEOS）：无水乙醇= 1：5：20，w / w / w）合成SiO2。 WEP乳液。通过冷冻干燥并在10 MPa的压力下于120摄氏度压缩2 h，从这些混合物中获得WEP复合材料。通过透射电子显微镜，扫描电子显微镜，动态力学分析和拉伸试验研究了WEP复合材料的形貌和力学性能。通过折叠展开SM测试评估了WEP复合材料的形状记忆（SM）性能。通过系统的变化揭示了填料含量和回收温度对SM性能的影响。结果证实，VGCNF和原位水解的SiO2被均匀分散并掺入WEP基质中。因此，实现了复合材料的机械和SM性能的显着改善。 POLYM。 COMPOS。，36：1712-1720，2015.（c）2014年塑料工程师学会

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