纳米二氧化硅修饰玻纤表面对玻纤增强聚丙烯复合材料性能的影响

基于纳米颗粒比表面积高的特性,将超声震荡分散后的纳米SiO₂通过化学接枝方法修饰玻璃纤维表面制备玻璃纤维/聚丙烯热塑性复合材料。通过扫描电子显微镜（SEM）表征纳米SiO₂在玻纤表面的分布状态及其与纤维树脂的结合情况,结果表明纳米颗粒在纤维表面分布状况良好,纤维与树脂能较为紧密地结合。通过动、静态力学测试表征复合材料的界面结合情况及整体力学性能,结果表明复合材料在动态热机械分析（DMA）测试下具备良好的综合界面性能;与空白组对比,复合材料的层间剪切强度最高提升约86%,拉伸强度最高提升约300%,弯曲强度最高提升约94%。

The effect of nano-silica modified glass fiber on the properties of glass fiber reinforced polypropylene composites

In order to take advantage of the high specific surface area of nanoparticles, a nano-silica suspension was dispersed by ultrasonication, and introduced onto the surface of glass fibers by chemical grafting. The modified glass fibers were molded into laminate composites with polypropylene (PP). The nano-silica nanoparticles were well distributed on the fiber surface, and the fiber and resin were strongly combined. The results of dynamic mechanical analysis (DMA) showed that the modified glass fiber/PP composites had a good comprehensive interface performance compared with the unmodified glass fibers, the interlaminar shear strength increased by about 86%, the tensile strength increased by about 300%, and the bending strength increased by about 94%.