为改善PVA/PEDOT∶PSS共混纤维的导电性能,采用湿法纺丝的方法,通过向PVA/PEDOT∶PSS混合纺丝液中添加山梨醇,制备出经山梨醇掺杂的 PVA/PEDOT∶PSS 共混纤维.采用红外光谱分析仪(FT-IR),高阻计,X射线衍射仪(XRD),显微共聚焦激光拉曼光谱仪,扫描电子显微镜(SEM),电子单纤维强力仪对共混纤维的结构与性能进行测试表征.通过对比分析掺杂前后共混纤维电导率的变化,探究了山梨醇掺杂对PVA/PEDOT∶PSS共混纤维结构和导电性能的影响.结果表明,山梨醇掺杂可以改善 PVA/PEDOT∶PSS共混纤维的导电性能,掺杂质量分数为7％时,共混纤维电导率达到19．1 S/cm.XRD结果显示,掺杂未改变PVA/PEDOT∶PSS共混纤维的结晶性能和聚集态结构；拉曼光谱显示,掺杂使得 PEDOT 的主要特征峰红移,PE-DOT主链发生苯-醌转变；掺杂使得共混纤维的表面逐渐变得光滑；掺杂后,共混纤维的拉伸强度升高,断裂伸长降低.
In order to improve the electrical conductivity of PVA/PEDOT∶PSS blended fibers,sorbitol was added,as a dopant,into PVA/PEDOT∶PSS blended spinning formulation.The modified PVA/PEDOT∶PSS blended fibers were prepared employing wet-spinning technique.The microstructures and properties were tested and characterized by Fourier transform infrared spectroscopy (FT-IR),electrometer,X-ray diffraction (XRD), laser Raman co-focal microspectrometry,scanning electron microscopy (SEM)and single fiber strength tester. The results shows that electrical conductivity of PVA/PEDOT∶PSS blended fibers improved slightly by sorbi-tol doping.The XRD shows that the amorphous state of sorbitol-doped blended fibers does not change;the Ra-man shows that the main characteristic absorption peak shifts to red,indicating that the PEDOT backbone turns from “benzoid structure”into “quinoid structure”;the SEM shows that the surface of blended fibers turns smooth gradually;the tensile strength of the blended fibers increase slightly,the elongation at break decreases slightly.
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