PEDOT/PSS质量分数对纺丝液流变性能及导电纤维可纺性的影响

Influence of PEDOT/PSS Contents on Rheological Properties of Spinning Formulation and Spinnability of Conducting Fiber

将质量分数为10%的聚乙烯醇(PVA)水溶液与聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸(PEDOT/PSS)水分散液共混,经过恒温高速搅拌,制备出均匀的PVA/PEDOT/PSS共混纺丝液,随后通过湿法纺丝制备出PVA/PEDOT/PSS纤维。借助旋转式流变仪探究不同PEDOT/PSS质量分数的纺丝液在纺丝温度的差异下,纺丝液的流变特性与可纺性的关系。采用高阻计和电子单纤维强力仪对成品纤维的导电性能和力学性能进行测试表征。使用扫描电子显微镜对不同PEDOT/PSS质量分数的纤维表面形貌进行表征。结果表明,PEDOT/PSS质量分数在0%~9.09%的质量分数范围内,随着纺丝液中PEDOT/PSS质量分数的增加,纺丝液黏度增大,PVA/PEDOT/PSS纺丝液可纺性呈先提高后降低的趋势。在30~90 ℃的范围内,随着纺丝体系温度的提高,PVA/PEDOT/PSS纺丝液可纺性呈先升高后降低的趋势;随着PEDOT/PSS质量分数的提高,PVA/PEDOT/PSS纤维的电导率逐渐升高,拉伸强度逐渐增加,拉伸断裂伸长率逐渐降低。

10%aqueous solution of polyvinyl alcohol(PVA)was mixed with poly(3,4-ethylenedioxythiophene )/poly(sodium-p-styrenesulfonate)(PEDOT/PSS)dispersion as spinning formulation by high-speed stirring.PVA/PEDOT/PSS conducting fiber was then fabricated by wet-spinning technique.The rotational rheometer was explored to explore the relationship between rheological properties and spinnability of the spinning formulation at different spinning temperature.High resistance meter and electronic single fiber strength gauge were used to characterize the electrical conductivity of conducting fiber.Scanning electron microscope(SEM)was used to characterize the surface topography of different contents of PEDOT/PSS fiber.The results show that with the increasing of PEDOT/PSS content,in the range of 0%~9.09%,the viscosity of spinning formulation increases,and the spinning formulation spinnability tends to increase first and then decrease.In the temperature range of 30~90 ℃,spinning formulation spinnability appears to increase first and then decrease with the increasing temperature of spinning system.As the PEDOT/PSS contents increase,the electrical conductivity of blend fiber increases,the tensile strength of blend fiber increases,and the elongation at break decreases.