一种PA6纤维表面化学镀银方法  

A Method of Electroless Silver Plating on the Surface of PA6 Fiber

作　　者：陈明 CHEN Ming(Dongfeng Commercial Vehicle Technology Center,Wuhan 430056,China)

机构地区：[1]东风商用车技术中心工艺研究所,湖北武汉430056

出　　处：《材料保护》2021年第1期127-130,共4页Materials Protection

摘　　要：为了提高PA6纤维的导电功能,使之成为抗电磁屏蔽的柔性材料,需要对PA6纤维表面进行金属化处理。通过双步敏化+银氨溶液活化预处理后,再进行化学镀的方法在PA6纤维织物表面均匀沉积一层金属银,制备Ag/PA6复合材料,借助SEM、EDS、电阻仪、手机2G信号,对镀层形貌、元素含量、附着力、电阻值、抗电磁波屏蔽效果进行了检测。结果表明:该镀层均匀、致密;银元素含量高,达到100%;镀层附着力良好;单位长度的电阻值低,电阻小于1Ω,具有良好的导电性;手机2G信号衰减量达到50%,具有良好的抗电磁屏蔽效应。化学镀的工艺条件:硝酸银11 g/L,氨水及氢氧化钠适量配制成1.1%的银氨溶液;还原剂:葡萄糖10 g/L,酒石酸2 g/L,乙醇100m L/L;通过加入10 g/L氢氧化钠溶液调节p H值11~13,温度20~30℃,反应时间3 min。In order to improve the conductive function of PA6 fiber and make it a flexible material with anti electromagnetic shielding,after two step sensitization and silver ammonia solution activation pretreatment,a layer of metallic silver was uniformly deposited on the surface of PA6 fiber fabric by electroless plating to prepare the Ag/PA6 composite. The morphology,element content,adhesion,resistance value and electromagnetic shielding effect of the coating were tested by SEM,EDS,resistance meter and 2 G signal of mobile phone. Results showed that the coating was uniform and dense;the content of silver was high,reaching 100%;the adhesion of the coating was good;the resistance per unit length was low,less than 1 Ω,indicating it has good conductivity;2 G signal attenuation of mobile phone reached 50%,which had good anti electromagnetic shielding effect. The technological conditions of electroless plating were as follows: silver nitrate 11 g/L,ammonia water and sodium hydroxide in proper amount ratio were used to prepare 1.1% silver ammonia solution. The components of reducing agent were glucose 10 g/L,tartaric acid 2 g/L,ethanol 100 ml/L. p H value was adjusted to 11 ~ 13 by adding 10 g/L sodium hydroxide solution,the temperature was 20 ~ 30 ℃,and the reaction time was 3 min.

关 键 词：化学镀银 PA6织物 导电纤维 

分 类 号：TQ153.1[化学工程—电化学工业]