浸润性可调的导电聚苯胺/聚丙烯腈同轴纳米纤维

聚苯胺(PANI)因其具有可调的导电性、优异的化学稳定性、简单的制备方法等特点, 在化学电源、抗静电涂层、电磁屏蔽材料、抗腐蚀、传感器等领域具有广泛的应用前景[^1~4]. 由于聚苯胺的刚性分子链使得聚苯胺几乎不溶不熔, 难以加工应用， 因此, 将导电聚合物直接制成纳米纤维一直是合成纤维界所希望的目标之一. 此外, 由于材料尺度的减小, 使纳米材料的表面与界面性质，尤其是表面浸润性变得更为突出.浸润性是固体表面的重要特征之一, 它主要由表面的化学组成和微观结构共同决定^[5,6]. 可调的浸润性在超疏水材料、药物传输、仿生材料和微流体等领域具有重要的应用价值^[7~10] , 引起人们广泛关注.

Conducting PANI/PAN Coaxial Nanofibers with Tuned Wettability

Abstract By using the template of electrospun polyacrylonitrile (PAN) nanofibers, PANI/PAN nanofibers of conducting forms were prepared in situ chemical polymerization of aniline with the oxidant (NH4)2S2O4.  The SEM indicates that the long nanofibers are randomly distributed in a fibrous mat with a rough surface composed PANI particles whose diameters are about 70-80 nm.  And the nanofibers′  core-shell structure, i.e. coaxial structure, which is consisted of core nanofiber of PAN and shell of PANI, is also displayed clearly by TEM image.  The PANI/PAN coaxial conducting nanofibers were dedoped by dilute ammonia solution and then redoped by PFOS, exhibiting wonderful superhydrophobicity.  The wettability of PANI/PAN coaxial nanofiber can be actively controlled by the doped different organic sulfonic acids on the surface.