State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China.
ACS Appl Mater Interfaces. 2013 Feb;5(4):1206-12. doi: 10.1021/am303292y. Epub 2013 Feb 7.
Highly aligned polyimide (PI) nanofiber membranes have been prepared by electrospinning equipped with a high speed rotating collector. As the electrospun polyimide nanofiber membranes possess large surface area, they can be used as the template for in situ growth of polyaniline (PANi) by using FeCl₃ as the oxidant. It is found that PANi nanoparticles can be uniformly distributed on the surface of highly aligned PI nanofibers due to the low oxidization/reduction potential of FeCl₃ and the active nucleation sites of the functionalized PI nanofibers. The as-prepared PANi/PI composite membranes not only possess excellent thermal and mechanical properties but also show good electrical conductivity, pH sensitivity and significantly improved electromagnetic impedance properties. This is a facile method for fabricating high-performance and multifunctional composites that can find potential applications in electrical and aerospace fields.
高度取向的聚酰亚胺（PI）纳米纤维膜通过配备高速旋转收集器的静电纺丝制备而成。由于电纺聚酰亚胺纳米纤维膜具有较大的表面积，因此可以用作原位生长聚苯胺（PANi）的模板，使用 FeCl₃作为氧化剂。研究发现，由于 FeCl₃的低氧化还原电位和功能化 PI 纳米纤维的活性成核位点，PANi 纳米颗粒可以均匀地分布在高度取向的 PI 纳米纤维的表面上。所制备的 PANi/PI 复合膜不仅具有优异的热学和力学性能，而且表现出良好的导电性、pH 敏感性和显著改善的电磁阻抗性能。这是一种制造高性能多功能复合材料的简便方法，可在电气和航空航天领域中找到潜在的应用。
