碳纤维无钯化学镀银工艺研究  

Palladium-free electroless silver plating on carbon fiber

作　　者：朱雁风[1,2] 张君艺 高培凯 ZHU Yan-feng;ZHANG Jun-yi;GAO Pei-kai(School of Materials Science and Engineering;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Henan University of Science and Technology,Luoyang 471000,Henan Province,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471000 [2]河南科技大学有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471000

出　　处：《化学工程》2023年第4期18-21,33,共5页Chemical Engineering(China)

基　　金：河南省高等学校重点科研项目计划(18A430013);河南科技大学大学生研究训练计划(2022054)。

摘　　要：为了替代传统的含钯敏化活化工艺,实现碳纤维表面无钯化学镀银,选择安全环保的多巴胺溶液来活化碳纤维。利用多巴胺溶液独特的自氧化聚合功能,首先采用浸泡法在碳纤维表面形成聚多巴胺活化层,然后以硝酸银为主盐,葡萄糖为还原剂,直接在碳纤维表面化学镀银。文中研究了硝酸银质量浓度、葡萄糖质量浓度、装载量对银的利用率和导电性的影响,并采用SEM和EDS对镀层表面形貌和成分进行分析。结果表明:多巴胺溶液活化碳纤维后,可以直接在碳纤维表面化学镀银。在固定反应温度50℃,反应时间1 h条件下,硝酸银质量浓度为15 g/L,葡萄糖质量浓度为30 g/L,装载量为4 g/L时溶液中银利用率最高,利用率可高达71.5%。所制备的镀银碳纤维的体积电阻率为0.74 mΩ·cm,银镀层致密均匀、无脱落现象。In order to replace the traditional palladium-sensitized activation process and realize the palladium-free electroless silver plating on the surface of carbon fiber,the safe and environment-friendly dopamine solution was selected to activate the carbon fiber.Taking advantage of the unique auto-oxidation polymerization function of dopamine solution,the activated layer of polydopamine was firstly formed on the surface of carbon fiber by soaking,and then silver nitrate was used as main salt and glucose was used as reducing agent,and the surface of carbon fiber was directly chemically plated with silver.The effects of silver nitrate concentration,glucose concentration,and loading amount on the utilization rate and conductivity of silver were studied,and the surface morphology and composition of the coating were analyzed by SEM and EDS.The results show that the carbon fibers can be directly electrolessly plated on the surface of carbon fibers after dopamine solution activation.Under the conditions of fixed reaction temperature of 50℃and reaction time of 1 h,the silver utilization rate in the solution is the highest when the silver nitrate mass concentration is 15 g/L,the glucose mass concentration is 30 g/L and the loading amount is 4 g/L.The utilization rate can be as high as 71.5%.The volume resistivity of the prepared silver-coated carbon fiber is 0.74 mΩ·cm,and the electroless silver coating is dense and uniform without peeling off.

关 键 词：碳纤维 化学镀银 多巴胺 

分 类 号：TG174.4[金属学及工艺—金属表面处理]