การเตรียมและสมบัติอิเล็กโทรสติกทิฟของเส้นใยพอลิยูรีเทนที่เจือด้วยพอลิอะนิลีน

Abstract

Increasing abilities of electrostrictive polymer that can indicate by electrostrictive coefficient (M) depend on dielectric constant and Young's modulus. Increasing dielectric constant of a polymer is the addition of filler. An increased dielectric constant that can be explained by increasing the interface between polymer matrix and filler which raised the interfacial polarization. In addition, the increase of dielectric constant is not depend on content, size, shape, and dispersion of filler but it's depend on the interface between the matrix and the filler. Therefore, the increase of interface is an important. In this research, forming the film in the form of fiber due to increase of the dielectric constant. Prepared the Polyurethane/Polyaniline (PU/PANI(ES)) composites fibers at 0.5, 1, 1.5, and 2% weight of PANI(ES) loading in the PU matrix by electrospinning technique under controlled process conditions, applied voltage 20 kV, distance between tip and collector 19 cm, and flow rate of 0.3 ml/h. Then, the morphology of the obtained fibers were investigated by SEM, structure of chemical by FTIR, electrical properties, mechanical properties, and eletrostrictive properties. The results showed when the PANI(ES) content increased which decreased the average diameter of fibers, increased fibers distribution, and increased spider-net fibers occurred between the main fibers. Preparation of the composites fibers by electrospinning technique did not change the structure of PU composites when compare with composites films. Moreover, the dielectric constant increase when the PANI(ES) content is increased and inversely proportional of Young's modulus. From the electrostrictive properties results of the PU/PANI(ES) fibers it was observed that the electrostrictive coefficient increased with an increase of the PANI(ES) content because of the increase of dielectric constant and the decrease of the Young's modulus that can be explained by a relationship of the electrostrictive coefficient according to £(2-1)2 Εγγ . Furthermore, the electrostrictive coefficient of the composites fibers about 6 times higher than the composites films because of the increasing spider-net fibers.