纳米纤维基柔性电子皮肤的构筑和结构与性能的研究

以前期对纳米纤维材料的制备和功能化改性的研究为基础，设计、构筑了具有压力传感、三维柔顺和舒适性的纳米纤维基电子皮肤。发展在循环应力变形中，形变能够恢复，导电性能能够可逆变化的弹性导电纳米纤维制备的新技术，研究原位掺杂的导电金属纳米粒子与弹性纤维大分子链间的相互作用，阐明其弹性可逆导电机理；将弹性导电纳米纤维构筑成表面具有不同空间几何结构、并能够可逆性互锁的阵列的弹性导电纳米纤维膜，组装成高灵敏度阵列基压力传感器，揭示纳米纤维基阵列结构对压力传感性能的影响规律；探索采用束状纳米纤维，并在纳米纤维表面组装或聚合有机导电聚合物来提高纤维基电化学晶体管性能的途径，建立有机导电纳米纤维束的物理形态、化学结构与晶体管性能的数量关系；将压力传感器与晶体管编织集成，提出材料结构、编织模式与电子皮肤的性能之间的理论模型，为纤维基可穿戴式柔性智能电子器件的开发提供新颖的、探索性的研究思路。

With the previous studies on the fabrication of nanofiber materials and surface functionalizations, a nanofiber based electronic skin with pressure sensitivity, 3-D flexibility and comfortability is designed and built. A novel technique of preparing stretchable conductive nanofibers is developed. The deformation and conductivity of the fabricated nanofibers can reversibly changed during repeated stretching and releasing cycles.The interaction mechanism between doped conductive metal nanoparticles and macromolecular chains is investigated. The nanofiber membrane with reversibly inter-lockable arrays on surfaces is constructed. The pressure sensor is assembled by bringing the arrays on the upper and lower layers into contact, and making them paired. The effect of inter-lockable array structures on the performance of pressure sensor is investigated. An organically conductive nanofiber bundle with conductive polymers on surfaces is attemped to be employed to improve the performance of electrochemical transistor which can quickly and effectively amplify weak signals from the pressure sensor with low applied voltage. The mathmatical relationships between physical and chemical structures of nanofiber bundles with the performance of transistor is illustrated. The nanofiber array based pressure sensor and transistor are assembled into a 3D flexible electronic skin by the weaving technique. The quantitative model of material structures and weaving models with the performance of electronic skin is established. The output of the project offers a new and creative way to develop nanofiber based wearable and flexible electronic devices.