工艺与制造英文2023被引 10
真空辅助树脂传递模塑工艺制备的竹纤维增强环氧树脂复合材料的力学性能、热性能及孔隙特征
Mechanical, Thermal Properties and Void Characteristics of Bamboo Fiber-Reinforced Epoxy Resin Composites Prepared by Vacuum-Assisted Resin Transfer Molding Process
Jiangjing Shi, Wenfu Zhang, Jian Zhang, Shaofei Yuan, Hong Chen · China National Bamboo Research Center
摘要整理
本研究旨在考察不同环氧树脂（EP）体系对竹纤维（BFs）浸润的影响，以及通过真空辅助树脂传递模塑（VARTM）工艺制备的竹纤维/环氧树脂复合材料的性能。采用溶液悬浮法制备竹纤维预成型体作为增强体，分别采用环氧/酸酐体系（EP-1）、环氧/胺体系（EP-2）和双组分环氧体系（EP-3）作为基体，通过VARTM工艺制备了BF/EP-1、BF/EP-2和BF/EP-3复合材料。对复合材料的物理性能、力学性能、热性能和孔隙特征进行了表征。结果表明，EP-1体系在23°C时粘度为265 mPa·s，室温下固化时间长，有利于对竹纤维的充分均匀浸润。竹纤维的加入显著提高了EP-1的弯曲强度、剪切强度、冲击强度、热性能和界面性能。BF/EP-1复合材料的综合性能优于BF/EP-2和BF/EP-3复合材料。三维X射线显微镜扫描结果表明，不同环氧树脂体系制备的复合材料中孔隙的体积和分布存在显著差异，BF/EP-1复合材料的孔隙体积分数仅为0.14%（三维重构模型）。
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