UHMWPE/PANI复合导电纤维的制备及其性能

Preparation and properties of UHMWPE/PANI composite conductive fibers

采用原位聚合法制备了UHMWPE/PANI复合导电纤维。探讨了氧化剂种类及过硫酸铵浓度对复合纤维电导率及表面形态的影响,并研究了UHMWPE/PANI复合纤维的化学结构及力学性能。结果表明:纤维表面形成的聚苯胺导电层赋予了纤维一定的导电性能,以过硫酸铵为氧化剂制得的复合纤维的导电性能最强,其电导率可达10-1S/cm;随过硫酸铵浓度的增加,复合纤维的电导率呈现先增后减的趋势,以30 g/L时制得的复合纤维的电导率最高。复合纤维是基质纤维与聚苯胺的共混体系,且导电处理未引起基质纤维分子链结构的变化。导电处理后,纤维的断裂强度较未处理前有少量增加,断裂伸长率基本保持不变。

UHMWPE/PANI composite fibers were prepared by in-situ polymerization. The effects of kinds of oxidant and concentration of ammonium persulfate on the electrical conductivity and surface morphology of the composite fibers were investigated, along with the chemical construction and mechanical properties. The results indicated that the polyaniline （PANI） conductive layer formed on the surface of the composite fibers imparted them certain conductivity, and the composite fibers prepared with ammonium persulfate as oxidizing agent have the best conductivity （up to l0-1 S//em）. The electrical conductivity increased at first and then decreased with the increase of the concentration of ammonium persulface, and the highest electrical conductivity obtained with the concentration of ammonium persulface of 30 g/L. The composite fiber was a blending system of matrix fiber and PANI, and the conductive processing did not lead to the change of the chemical structure of the matrix fiber, and the fiber＇s breaking strength increased a little and breaking elongation unchanged basically as compared with the control.