乙二醇添加量对PEDOT∶PSS/PVA复合纤维形貌和性能的影响

Effect of Ethylene Glycol on Morphology and Properties of PEDOT∶PSS/PVA Composite Fibers

为改善PEDOT∶PSS/PVA复合纤维的导电性,在PEDOT∶PSS和PVA混纺水溶液中添加不同含量的乙二醇(EG),采用湿法纺丝制备复合导电纤维。探究了EG的添加量对复合纤维表面形貌及力学、导电性能的影响。采用包括电子单纤维强力仪在内的多种方法对纤维进行测试。结果表明:EG可改善复合纤维的外观形貌,使纤维表面裂纹消失趋于光滑,且随EG添加量的增加,复合纤维的导电性逐渐增强,在EG添加量为10%时,电阻率从(3.0±0.2)MΩ下降到(0.6±0.1)MΩ,纤维的拉伸强度从(180±15)MPa提高到(246±10)MPa。拉曼光谱表明,EG可使PEDOT主特征峰红移,使PEDOT主链发生苯醌转变。

In order to improve the electrical conductivity of PEDOT∶PSS/PVA composite fibers,ethylene glycol(EG)was added into PEDOT∶PSS/PVA blended spinning formulation.Effect of the amount of EG on the surface morphology and mechanical and electrical properties of the composite fibers were investigated.And the fibers were tested and characterized by several techniques including electronic single-fiber strength meter.Results show that the doping of EG improves the appearance of the composite fiber and make the surface cracks of the fiber disappear.When the content of EG increases,the conductivity of the composite fiber gradually increases,and when the doping content of EG increase to 10%,the resistivity decreases from(3.0±0.2)MΩto(0.6±0.1)MΩ,and the tensile strength of the fiber increases from(180±15)MPa to(246±10)MPa.Raman spectra show that the main characteristic absorption peak shift to red,indicating that the PEDOT backbone turns from“benzoid structure”into“quinoid structure”.