聚丙烯/纳米二氧化硅复合材料研究进展

Research Progress in Polypropylene/Nano Silicon Dioxide Composites

从制备方法、相容性和增强增韧机理3个方面综述了聚丙烯(PP)/纳米二氧化硅(SiO2)复合材料的研究进展。其中,制备方法包括原位聚合法、溶胶-凝胶法和超声波法;增强增韧机理包括裂缝与银纹相互转化机理、物理化学作用机理、微裂纹化机理和临界基体层厚度机理。指出了可以通过对纳米粒子进行表面改性,以降低其表面势能、调节疏水性、增加与基体之间的润湿性和结合力来改善材料的性能。

This review was about polypropylene/nano silicon dioxide composites with their preparation, compatibility, and toughening/reinforcing mechanism introduced. The preparation methods included in-situ polymerization, sol-gel, and ultrasonic procedure. The mechanism involved in toughening of polypropylene matrix by the nanoparticles, including cracks/craze mutual transformation, physical chemistry process, and critical ligand thickness. The mechanical properties of the composites could be further increased through surface modification of the nanoparticles to reduce the interface energy, increase the wetting and binding, and regulate its hydrophobicity.