文献类型：期刊文章

作　　者：陈国华[1] 吴翠玲[1] 吴大军[1] 翁文桂[1] 黄双喜[1] 林善旭[1]

机构地区：[1]华侨大学材料科学与工程系,泉州362011

出　　处：《高分子学报》

基　　金：国家自然科学基金 (基金号 2 98740 16;2 0 1740 12 )资助项目

年　　份：2003

卷　　号：13

期　　号：5

起止页码：742-745

语　　种：中文

收录情况：AJ、BDHX、BDHX2000、CAS、CSCD、CSCD2011_2012、IC、JST、PL、RCCSE、SCI(收录号：WOS:000186339300027)、SCI-EXPANDED(收录号：WOS:000186339300027)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：A preparation process of PMMA/graphite nanocomposites was developed via in situ polymerization of monomers in the presence of sonicated expanded graphite with the aid of sonication.Expanded graphite was sonicated in a 70% aqueous alcohol solution to get graphite platelets (NanoG) with thickness of 30～80 nm and diameter of 0.5～20 μm.The NanoG were dispersed in MMA monomers with BPO initiator.In situ polymerization was taken place when the mixture was heated under sonication.The TEM studies showed that the graphite nano-platelets were well dispersed in the PMMA matrix.Solution cast films of the nanocomposite were used for electrical conductivity measurements.The percolation threshold of polymer/NanoG nanocomposite films at room temperature was lower than 1.0 wt%,which was much lower than that of the composites with conventional graphite filler which was 5.5 wt%.The electrical conductivity reached 10 -3 S/cm at a graphite content of about 4.0 wt%.The special structure of graphite nano- platelets with high aspect ratio of as high as 100～500 (width-to-thickness) played an important role in forming a conducting network within the PMMA matrix.

关 键 词：聚甲基丙烯酸甲酯 膨胀石墨 纳米复合材料 导电性能 原位聚合 导电高分子

分 类 号：TB383[材料类]