摘要
利用乳液模板-静电自组装法,以甲基丙烯酰氧乙烯氯化铵(DMC)接枝改性的聚苯乙烯阳离子微球(PS+)为基体模板、石墨烯为导电介质,利用氧化石墨烯(GO)与PS+间强烈的静电相互作用直接在水中共组装,通过水合肼原位还原(in-situ reduction)成功制备了纳米石墨烯片(GNs)填充的聚苯乙烯(PS)导电复合材料。复合材料断口扫描电镜(SEM)和电性能结果表明,静电自组装有利于形成较为完善的石墨烯导电网络,GNs/PS复合材料具有极低的导电逾渗值(0.09%(体积分数))和较高的饱和导电率(25.2S/m)。结合表面zeta电位、复合物微观形貌的表征,对组装机理和结构-性能关系进行了讨论。此外,热重热分析(TGA)结果表明,石墨烯的加入有效地改善了材料的热稳定性。
Electrically conductive graphene nanosheets filled polystyrene （GNs/PS） nanocomposites were fabrica- ted via electrostatic assembly integrated latex-template technology. Firstly, positive charged PS beads were synthesized with dispersed polymerization by using methacryloxyethyltrimethyl ammonium chloride as co-mon- omer, and then coassembled with graphene oxide. Eventually, GNs/PS nanocomposites with a honeycomb-like GNs framework were obtained after the follwoing in situ reduction and hot compression molding steps. Due to the well-constructed GNs network which elecrevealed by scanning electron microscope （SEM）, the resulted GNs/PS nanocomposites show extremely low percolation threshold of 0.09vo1% and high saturated conductivity of 25.2S/m. TGA analysis implied that the thermal stability of PS was improved by the addition of GNs. The mechanism of co-assembly and the formation of such microstructure were discussed.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第19期2888-2891,共4页
Journal of Functional Materials
基金
新世纪优秀人才支持计划资助项目(NCET-10-0576)
中国热带农业科学院院本级基本科研业务费专项资助项目(1630062013011)
关键词
聚苯乙烯
纳米石墨烯片
乳液模板
静电自组装
电学性能
polystyrene
graphene nanosheets
latex template
electrostatic assembly
electrical property
