摘要
采用“非刻蚀?无钯活化”法对Kevlar?芳纶纤维织物进行表面改性,再化学镀得到掺钨镀银层。表面改性的主要步骤为:先用丙酮超声除油30 min,然后用含0.1 mol/L AgNO3的N?甲基吡咯烷酮水溶液在90°C下溶胀浸渗2 h,再置于室温的10 g/L NaBH4溶液中还原15 min。化学镀液(pH=10.0~11.0)由AgNO3、Na2WO4·2H2O、1.3 mol/L NH3·H2O、0.5 mol/L CH3COOH、0.0005 mol/L糖精、0.02 mol/L乙二胺四乙酸二钠和0.009 mol/L水合肼配制得到。研究了镀液中AgNO3和Na2WO4的浓度比(总浓度为0.6 mol/L)对掺钨镀银层的方块电阻、抗Na2S变色和耐中性盐雾腐蚀性能的影响。结果表明,AgNO3和Na2WO4的浓度比为2∶1时,所得掺钨镀银层的各项性能都最佳。
The surface of aramid fiber fabric was modified by a non-etching and Pd-free activation process,and then electrolessly plated with tungsten-doped silver.The main surface modification steps are as follows:(1)ultrasonic degreasing in acetone for 30 min;(2)swelling and impregnation in aqueous N-methylpyrrolidone solution containing 0.1 mol/L AgNO3 at 90℃ for 2 hours;(3)reduction in 10 g/L NaBH4 solution at room temperature for 15 min.The electroless plating bath(pH=10.0-11.0)was composed of AgNO3,Na2WO4·2H2O,NH3·H2O(1.3 mol/L),CH3COOH(0.5 mol/L),saccharin(0.0005 mol/L),disodium ethylenediaminetetraacetate(0.02 mol/L),and hydrazine hydrate(0.009 mol/L).The effect of concentration ratio of AgNO3 to Na2WO4·2H2O(their total concentration 0.6 mol/L)in the bath on square resistance of the tungsten-doped silver coating as well as its anti-tarnish efficacy after exposure to Na2S and neutral salt spray corrosion resistance was studied.The coating obtained at a AgNO3-to-Na2WO4 concentration ratio of 2:1 had the best comprehensive properties.
作者
孙宁霞
赵志鲁
彭雨晴
李爱军
袁园
白瑞成
SUN Ning-xia;ZHAO Zhi-lu;PENG Yu-qing;LI Ai-jun;YUAN Yuan;BAI Rui-cheng(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2019年第20期1081-1084,共4页
Electroplating & Finishing
基金
宇航微波电缆电磁屏蔽用镀银芳纶纤维（沪经信军[2014]495号）
关键词
芳纶纤维织物
化学镀银
钨
掺杂
耐蚀性
导电性
aramid fiber fabric
electroless silver plating
tungsten
doping
corrosion resistance
conductivity
