具有伸展链构象聚苯胺/蒙脱土混杂纳米复合物的合成与表征

SYNTHESIS AND CHARACTERIZATION OF PAN/ CLAY HYBRID WITH EXTENDED CHAIN CONFORMATION OF POLYANILINE

报道了具有聚苯胺伸展链构象的聚苯胺／ 粘土（ Ｐ Ａｎ／ Ｍ Ｍ Ｔ） 混杂纳米复合物的合成与表征．用插层聚合的方法将聚苯胺分子链嵌入层状蒙脱土的片层之中，从而得到一种高电导率的聚苯胺／ 层状硅酸盐混杂纳米复合物．通过 Ｘ射线衍射（ Ｘ Ｒ Ｄ） ，付立叶红外（ Ｆ Ｔ Ｉ Ｒ） ，四探针电导率测量以及定性和定量的电子光谱分析等手段对产物进行了表征，结果表明，９０ ％ 以上的聚苯胺的分子链被插入蒙脱土的片层中间．由于聚苯胺分子链在受限的纳米空间生成，聚苯胺以伸展的单分子链构象存在．该构象在苯胺的通常聚合中不可能生成．通过对聚合过程进行吸收光谱监测，发现该聚合是扩散控制过程．

Synthesis and characterization of high conductivity polyaniline/clay hybridnanocomposite with extended chain conformation are presented in this paper. The conductiveemevaldine saltform of polyanilineisinserted into the galleries of montmorilloniteto producethe hybrid with high conductivity . The properties of the hybrid are characterized by X Raydiffraction ( X R D) , F T I R,conductivity measurement,qualitative and quantitative analysis ofelectron and opticalspectra ,theresultsshow that what we obtained isreally a nanocompositeand over 90 % polyaniline chain is inserted between the layers . In the nanocompositepolyaniline exists in single chains with extended chain conformation owing to the confinedenvironmentin the nanometer size gallery . Monitoring the polymerization process by electronand optical spectrait was found that the polymerization is a diffusion limited process.