Bottom-up synthesis of PS–CNF nanocomposites
Bottom-up synthesis of PS–CNF nanocomposites
复制标题
DOI：
10.1016/j.polymer.2004.11.091
复制
发表时间：
2005-01
期刊：
影响因子：
4.6
通讯作者：
Yijin Xu;B. Higgins;W. Brittain
中科院分区：
文献类型：
--
作者：
Yijin Xu;B. Higgins;W. Brittain
采用静电自组装的方法合成了聚苯乙烯-碳纳米纤维（CNF）纳米复合材料。首先，通过常规乳液聚合合成阳离子聚苯乙烯（PS）胶乳。将胶乳与氧化CNF的水性悬浮液混合。由于阳离子PS胶乳和阴离子CNF之间的静电相互作用，通过异相凝聚得到PS-CNF纳米复合材料。用DSC和TGA对复合材料的热性能进行了表征，用SEM对复合材料的形貌进行了研究。电阻率结果表明，在我们的PS-CNF纳米复合材料的逾渗阈值是低于2wt%（1vol%）。这种低逾渗阈值与CNF在PS基质中的分散有关，因此与CNF在PS基质中的上级网络形成有关。
Polystyrene–carbon nanofiber (CNF) nanocomposites have been synthesized by a ‘bottom-up’ method through electrostatic assembly. First, a cationic polystyrene (PS) latex was synthesized by conventional emulsion polymerization. The latex was mixed with an aqueous suspension of oxidized CNF. PS–CNF nanocomposites were obtained by heterocoagulation due to the electrostatic interaction between cationic PS latex and anionic CNF. Thermal properties were characterized by DSC and TGA, while morphologies of the nanocomposites were studied by SEM. Electrical resistivity results showed that the percolation threshold in our PS–CNF nanocomposites was below 2wt% (1vol%). This low percolation threshold is related to the dispersion, and thus a superior network formation of CNF in PS matrix.