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将浓度为10%(wt,质量分数,下同)的完全醇解的聚乙烯醇(PVA)水溶液与聚3,4-乙撑二氧噻吩∶聚对苯乙烯磺酸根阴离子(PEDOT∶PSS)分散液经高速搅拌共混制得纺丝液,采用湿法纺丝的方法制备PVA/PEDOT∶PSS复合导电纤维。通过向甲醇凝固浴中添加异丙醇改善PVA/PEDOT∶PSS复合导电纤维的表面微观形貌、导电及拉伸力学性能。混合凝固浴中异丙醇与甲醇的质量比分别为0∶1、1∶5、1∶4、1∶3、1∶2和1∶1,探究异丙醇添加量的变化对PVA/PEDOT∶PSS复合导电纤维表面微观形貌及力学、导电性能的影响。采用扫描电子显微镜、红外光谱分析仪、高阻计和电子单纤维强力仪对复合纤维进行测试表征。结果表明:异丙醇的添加改善了PVA/PEDOT∶PSS复合导电纤维的表面微观形貌、导电及拉伸力学性能。随着凝固浴中异丙醇含量的增加,PVA/PEDOT∶PSS复合导电纤维表面的沟槽逐渐减少,纤维表面逐渐变得光滑;复合纤维的电导率小幅度提升;复合纤维的拉伸强度提高,断裂伸长增加。
An aqueous solution of fully alcohololyzed polyvinyl alcohol (PVA) at a concentration of 10% (wt, mass fraction, the same below) was mixed with poly 3,4-ethylenedioxythiophene: polystyrenesulfonate anion (PEDOT: PSS) The dispersion liquid was blended by high-speed stirring to obtain a spinning solution, and the PVA / PEDOT: PSS composite conductive fiber was prepared by a wet spinning method. The surface morphology, electrical conductivity and tensile mechanical properties of PVA / PEDOTPSPS composite conductive fibers were improved by adding isopropanol to the methanol coagulation bath. The mass ratio of isopropanol to methanol in the mixed coagulation bath was 0: 1, 1: 5, 1: 4, 1: 3, 1: 2 and 1: 1 respectively. : PSS composite conductive fiber surface morphology and mechanical, electrical conductivity. The composite fibers were characterized by scanning electron microscopy, infrared spectroscopy, high resistance meter and electronic single fiber strength tester. The results show that the addition of isopropanol improves the surface morphology, electrical conductivity and tensile mechanical properties of PVA / PEDOT: PSS composite conductive fibers. With the increase of isopropanol content in the coagulation bath, the grooves on the surface of PVA / PEDOT: PSS composite conductive fibers gradually decreased and the surface of the fibers gradually became smooth. The conductivity of the composite fibers increased slightly and the tensile strength of the composite fibers increased , Elongation at break increases.