Synthesis of nano-CaCO_3 composite particles and their application  

作　　者：Wei Wu Xueqin Zhang Jianfeng Chen Shuling Shen 

机构地区：[1]Key Lab of the Ministry of Education of China for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, China [2]Research Center of the Ministry of Education of China for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China

出　　处：《Journal of University of Science and Technology Beijing》2008年第1期67-73,共7页北京科技大学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.20236020,20325621);the National R & D Program of China(No.2001BA310A01).

摘　　要：Nano-calcium carbonate composite particles were synthesized by the soapless emulsion polymerization technique of double monomers. The composite particles formation mechanism was investigated. The effects of composite particles on the mechanical properties of nano-CaCO3-ABS （acrylonitrile-butadiene-styrene copolymer） composite material were studied. It was validated that the composite particles are made up of the nano-calcium carbonate cores and the shells of alternating copolymers of butyl acrylate （BA） and styrene （St）. The shells are chemically grafted and physically wrapped on the surface of nano-calcium carbonate particles. When the composite particles were filled in ABS matrix, the CaCO3 particles are homogeneously dispersed in the composite material as nanoscales. The impact strength of the composite material is obviously enhanced after filling appropriate amounts of composite particles. It can be concluded that the soapless emulsion polymerization of double monomers is an effective method for nano-CaCO3 surface treatment. 2008 University of Science and Technology Beijing. All rights reserved.Nano-calcium carbonate composite particles were synthesized by the soapless emulsion polymerization technique of double monomers. The composite particles formation mechanism was investigated. The effects of composite particles on the mechanical properties of nano-CaCO3-ABS （acrylonitrile-butadiene-styrene copolymer） composite material were studied. It was validated that the composite particles are made up of the nano-calcium carbonate cores and the shells of alternating copolymers of butyl acrylate （BA） and styrene （St）. The shells are chemically grafted and physically wrapped on the surface of nano-calcium carbonate particles. When the composite particles were filled in ABS matrix, the CaCO3 particles are homogeneously dispersed in the composite material as nanoscales. The impact strength of the composite material is obviously enhanced after filling appropriate amounts of composite particles. It can be concluded that the soapless emulsion polymerization of double monomers is an effective method for nano-CaCO3 surface treatment. 2008 University of Science and Technology Beijing. All rights reserved.

关 键 词：nano-calcium carbonate composite particles soapless emulsion polymerization composite material mechanical properties MECHANISM 

分 类 号：TG146.1[一般工业技术—材料科学与工程]