PVA覆膜对Kevlar纤维表面化学镀Cu层性能的影响

通过聚乙烯醇 (PVA) 覆膜处理的方法提高了Kevlar纤维表面金属镀层稳定性和完整性,从而提升了镀层的抗剥落能力.采用弯折剥离实验考察了镀层的抗剥落破坏情况、采用电阻仪和电子万能试验机测试了试样的导电性和力学性能,利用扫描电子显微镜(SEM)和X射线光电子能谱(XPS)研究了试样的表面形貌和表面化学价态. 结果表明:PVA覆膜能够有效提升金属镀层的抗剥落破坏能力;随着PVA水解浓度的增加,PVA覆膜Cu/Kevlar纤维的表面电阻增加而柔韧性降低;当PVA溶液的水解质量浓度为5 g/L时,PVA覆膜Cu/Kevlar纤维的柔韧性、导电性和抗剥落能力能够维持在最佳状态;在此浓度下,PVA覆膜Cu/Kevlar纤维的表面电阻为0.41 Ω/cm,单丝拉伸强度为2.396 GPa,Weibull分布拟合度为0.988 1.

Effect of PVA coating on the performance of electroless copper plating layer on the surface of Kevlar fiber

The stability and integrity of the metal coating on the Kevlar fiber surface were improved by the method of polyvinyl alcohol (PVA) coating, thereby improving the anti-peeling ability of the coating. The bend-peel-off test was performed to investigate the anti-peeling ability of the metal layer. The resistance tester and the electronic universal testing machine were used to test the conductivity and tensile strength of the sample. Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) were used to study the surface morphology and chemical valence of the sample. The results showed that the PVA coating can effectively improve the anti-peeling ability of the metal coating. As the PVA concentration increases, the surface resistivity of the copper-plated Kevlar fiber increases, while the flexibility decreases. When the concentration of the PVA solution is 5 g/L, the flexibility, conductivity, and anti-peeling ability of PVA-coated Cu/Kevlar fiber can be maintained at an optimal state. At this concentration, the surface unit resistance of the PVA coated Cu/Kevlar fiber is 0.41 Ω/cm, the monofilament tensile strength is 2.396 GPa, and the fitting degree of the Weibull distribution is 0.988 1.