共轭聚合物半导体纤维取向结晶及电子-离子传输行为调控

共轭聚合物半导体纤维兼具半导体功能特性与纤维结构优势，在消费电子、特种防护、单兵作战等领域具有重要的应用前景。但相比于传统成纤聚合物，电子-离子混合传导型的共轭聚合物由于其梯状共轭分子结构及分子间强pi-pi相互作用力等特点，导致纺丝溶体可纺性差、力学性能及半导体性能难以满足应用需求。本项目提出“流变设计-质子交换-牵伸取向”协同纺丝新方法，构建高取向高结晶的电子-离子混合传导型半导体纤维。通过微流剪切场的设计调控纺丝液流变性能，获得可纺性溶体；利用多外场参数调控，结合原位表征手段获得具有优异力学及半导体性能的共轭聚合物纤维；设计取向及多孔结构调控电子-离子双向输送，获得纤维形态0-1数字逻辑运算器件。本项目将有望建立一种电子-离子混合传导型聚合物半导体纤维的湿法纺丝新方法，为构建具有逻辑运算功能的智能织物提供一条新路径。

Combining semiconducting property and fibrous structure, conjugated semiconducting fibers are up-and-coming in various applications, including personal electronics, special protection and individual combat system. However, continuous spinnable solution and controllable formation of fibers are still challenging due to ladder-like molecular structure and intermolecular pi-pi interaction, which result in inferior semiconducting performance and mechanical stability. Here, we propose a project on the integration of "rheological design - proton exchange - orientation spinning", where semiconducting fibers with high crystallinity and orientation can be fabricated continuously. Spinnable solution is obtained through confined fluid design with the coordination of solution viscoelasticity. Consequently, conjugated polymer fibers with excellent mechanical and semiconducting properties are obtained through multiple external field parameter adjustments combined with in-situ characterization mythologies. Both electron and ion transport are optimized via the rational design of porous morphology with polymer chain orientation, accompanied by the realization of fiber-like logical circuits. In summary, wet-spinning strategy for conjugated polymer fibers is established, which paves the way for the design of smart textiles with logical computation properties.