【摘要】 通过溶胶-凝胶法将锐钛矿型纳米二氧化钛负载到有机黏土片层表面,然后与聚丙烯(polypropylene,简称PP)熔融共混制备可光降解的聚丙烯/黏土复合物。实验结果表明,纳米锐钛矿型二氧化钛粒子均匀分布在有机黏土片层表面,粒子尺寸在8～12nm之间。采用FT-IR,SEM和GPC表征聚丙烯/黏土纳米复合薄膜光降解,结果表明负载纳米锐钛矿型二氧化钛的有机黏土对聚丙烯的光降解速率较商品二氧化钛的快,纳米二氧化钛粒子在有机黏土表面均匀分布,可有效避免二氧化钛粒子的团聚,增加了二氧化钛和聚丙烯基体的有效接触面积,极大地提高了材料的光降解速率。本方法为制备新型环境友好聚合物纳米复合物提供了实验依据。更多还原

【Abstract】 Anatase type TiO2 nanoparticles were firstly immobilized on the surface of organoclay layer by sol-gel method, and photodegradable polypropylene/clay nanocomposites were then prepared via melting blending polypropylene (PP) and TiO2 immobilized organoclay. The results show that anatase type TiO2 with size of 8～12 nm is uniformly dispersed on the surface of the organoclay layers, TiO2 immobilized organoclay has a higher photodegradation rate in polypropylene matrix than that of commercial TiO2. This is due to the uniform dispersion of TiO2, which avoides the formation of huge aggregation and increases the interface area between TiO2 and polymer matrix. The present method provides the experimental basis for preparing novel and environmental friendly polypropylene nanocomposite materials.更多还原