微/纳米结构的聚苯胺及其浸润性研究

STUDIES ON THE MICRO/NANO-STRUCTURED POLYANILINE AND ITS WETTABILITY

借助沉积聚合辅助的“无模板”法在玻璃基片上制备出水杨酸掺杂的微/纳米结构的聚苯胺.实验发现,微/纳米结构的形貌及其浸润性依赖于掺杂剂与单体的摩尔比和沉积时间.当低分子量的聚苯胺微米球和纳米球共存时,其沉积的表面呈现出高的疏水性(接触角θ=148.0°),这主要来源于微/纳米共存的结构导致高的表面粗糙度,能捕获更多的空气所致.FTIR,紫外-可见光谱和X光射线衍射表征了微/纳米球的分子结构及其结晶性.

Micro/nano-structures of salicylic acid （SA） doped polyaniline （PANI） deposited on a glass substrate were prepared by a template-free method associated with a deposition process. It is found that the morphology and wettability of the PANI-SA deposited on the substrate are affected by the molar ratio of dopant to aniline （An） and deposition time. A highly hydrophobic surface with a water contact angle of 148° is constructed by the co-existence of microspheres and nanofibers prepared at the reaction time of 60 min and [ SA ] / [ An ] = 1 ： 1. It originates from the contribution of the air trapped in the inter-space of rough surface aggregated by micro/ nano-structures. The molecular structure characterized by FTIR and UV-Visible shows that the product obtained in the initial stage of polymerization is oligoaniline, while the finial product is identical to the emeraldine salt form of PANI.