前处理对锦纶化学镀银的影响

为探索锦纶化学镀银前处理的最优工艺条件,文章采用钯催化化学镀银的方法,按除油、粗化、敏化、活化顺序逐步处理锦纶纤维,着重探讨锦纶化学镀银前处理工艺中每一步的最佳温度、质量分数和时间,最后对前处理纤维和镀银纤维进行测试和表征。研究表明,最佳前处理工艺条件为除油:温度40℃、质量分数60%的乙醇溶液和时间90 min;粗化:温度40℃、质量分数15%的盐酸溶液和时间90 min;敏化:温度40℃、质量分数2%的盐酸及0.6%的氯化亚锡和时间50 min;活化:温度40℃、质量分数0.05%的氯化钯和时间50 min。采用此工艺的镀银纤维清洗失银率、电阻、强力损失率和镀银率分别为2.5%、0.4Ω、17.5%和28.48%。

Influence of pretreatment on electroless silver plating of polyamide

In order to explore the optimum pre-treatment conditions for the preparation of electroless silver plating of polyamide fibers, the method of electroless silver plating catalyzed by palladium was adopted. Polyamide fibers were treated gradually by oil cleaning, coarsening, sensitization and activation. The optimal temperature, mass fraction and treatment time in each process were investigated. Finally, pre-treated fibers and silver-plated polyamide fibers were tested and characterized. It was found that the optimal pretreatment conditions were as follows: oil cleaning: 60 % wt ethanol solution, time 90 minutes, temperature of 40 ℃;coarsening: 40 ℃, 15 % wt hydrochloric acid solution, time 90 minutes;sensitization, 2 % wt hydrochloric acid and 0.6 % wt stannous chloride, time 50 minutes, temperature 40 ℃;activation, 40 ℃, 0.05 % wt palladium chloride, time 50 minutes. By using these pre-treatment parameters, the silver loss rate after cleaning, resistance, strength loss and silver plating content were 2.5 %, 0.4 Ω, 17.5 % and 28.48 %, respectively.