The Study Of Preparation Of Conductive Nanofiber Based Membranes And Their Application For Sensors

Conductive fiber has lots of applications in several fields, owing to its flexibility, knittability and good conductivity. With more and more diversified applications, it is harder for conventional conductive fiber to satisfy the demand of e-sensors, because of its poor sensitivity and conductivity. The composite of nanofiber and conventional fiber not only can keep flexible and knittable, and also can improve its conductivity and specific surface area.By melt blending extrusion, the PVA-co-PE nanofiber which was coated onto the surface of conventional fiber was fabricated, then treated by in situ polymerization or electroless plating to get the conductive membrane, at last applied in alcohol sensor and organic electrochemical transistor as well as the tension-compression sensor. Based the mechanism of pili-like transferring electron, the influence of the content of nanofiber in the composite had been studied, the PVA-co-PE nanofiber not only improved its specific surface area, and also offered the convenient electronic channel. The conductive composite membrane by eletroless plating Nickel was used as the electrodes of capacitor to test the content of alcohol, it was found that the membrane with nanofiber had better sensibility. 50 D, 85 D, 120 D and PVA-co-PE/85 D PA conductive fiber was fabricated by in situ polymerization, and its conductive order was PVA-co-PE/85 D>120 D>85 D>50 D, and its switch ratio was about 103-104 in organic electrochemical transistors, then ion sensor was explored.