聚乙烯醇对芳纶复合纱聚苯胺导电层耐久性影响

为提高聚苯胺导电层与基材之间的黏结牢度,以聚乙烯醇为共混高聚物,通过连续原位聚合法在对位芳纶纱线表面形成聚乙烯醇/聚苯胺导电层,制备得到芳纶/聚苯胺/聚乙烯醇复合导电纱。分析了导电纱的结构与性能,并研究了聚乙烯醇对聚苯胺导电层耐水洗和耐磨性的影响。结果表明:适量添加聚乙烯醇有助于提高导电纱导电层的结构规整性及电导率,随着聚乙烯醇质量分数的提高,导电纱的电导率呈先上升后下降的趋势,当聚乙烯醇占苯胺的质量分数为4.30%时,制得的复合导电纱线的电导率最高,达到(1.120±0.198) S/cm;聚乙烯醇的添加和质量分数的提高,有助于聚苯胺导电层耐水洗性及在较小外力作用下的耐磨性的提高。

Effect of polyvinyl alcohol on durability of polyaniline conductive layer on poly(p-phenylene terephthamide) yarn surface

In order to improve the bonding fastness between polyaniline (PANI) conductive layer and substrate materials, poly(vinyl alcohol )(PVA) was used as the copolymer to fabricate PANI/PVA conductive layer on the surface of poly(p-phenylene terephthamide) (PPTA) yarns by a continuous method based on in-situ polymerization technique, and conductive PPTA/PANI/PVA composite yarns were obtained. The structure and properties of conductive composite yarns were analyzed, and the influence of PVA on washing resistance and wear resistance of PANI conductive layer was studied. The results show that appropriate amount of PVA is helpful to improve the structure regularity and conductivity of the conductive layer. With the increase of PVA mass ratio, the conductivity of the conductive composite yarns first increases and then decreases. When the mass ratio of PVA to aniline is 4.30%, the conductivity of the conductive composite yarn is the highest, reaching (1.120±0.198) S/cm .The addition of PVA and the increase of its mass ratio contribute to the improvement of the washing resistance and wear resistance of PANI conductive layer under the action of small external force.