SiO_2/CaCO_3纳米复合粒子填充改性聚丙烯  

SiO_2/CaCO_3 Nano Composite as Filler to Modify the Mechanical Properties of Polypropylene

作　　者：杨勇[1] 文利雄[1] 陈建峰[1] 

机构地区：[1]纳米材料先进制备技术与应用科学教育部重点实验室

出　　处：《高分子材料科学与工程》2006年第6期130-133,共4页Polymer Materials Science & Engineering

基　　金：教育部新世纪优秀人才支持计划(NCET-04-0123);国家自然科学基金(20325621);国家863计划资助项目(2003AA302620);北京市教委(JD100100403);教育部留学回国人员科研启动基金资助项目

摘　　要：通过简单的工艺条件和步骤制备S iO2包覆C aCO3的核壳结构纳米复合粒子,采用硅烷偶联剂对其和纳米S iO2实心粒子进行表面改性处理,并用处理后的两种粒子分别对聚丙烯进行填充改性,然后比较其对复合材料力学性能的影响。结果表明,利用纳米S iO2/C aCO3复合粒子填充改性聚丙烯,可同时达到增强、增韧的目的,而且对材料力学性能的改性效果与纳米S iO2实心粒子的改性效果相近。Nano SiO2 solid particles are used as polymer fillers and have significant effects on the mechanical properties of polymers. However, nano SiO2 is quite expensive. With a sol-gel route, a thin SiO2 film was synthesized on the surface of CaCO3 nanoparticles, thus forming a core-shell structured SiO2/CaCO3 nano composite. After some surface modification, this SiO2/CaCO3 nano composite was filled in polypropylene （PP） at various concentrations and its effects on the mechanical properties of PP were investigated, it is found that the surface-modified SiO2/CaCO3 nano composite particles can be evenly dispersed in PP and remarkably enhance the strength and toughness of the inaterial silnultaneously with a modification efficiency close to that of SiO2 nanoparticles. However, with the core being a much cheaper CaCO3, the cost of SiO2/CaCO3 nano composite as filler can be reduced significantly, which will boost the polymer modification application by this composite filler.

关 键 词：纳米粒子 复合材料 核壳结构 聚丙烯 改性 

分 类 号：TB383[一般工业技术—材料科学与工程]