摘要
为了解决碳纤维电镀铜过程中表面出现"黑芯"问题,通过对碳纤维表面先进行预处理,然后再化学镀铜,取得了良好的效果。该方法使铜镀层均匀分布于碳纤维表面,增强了非金属碳与金属铜之间的结合强度。其中预处理包括脱胶、脱脂、氧化、敏化和活化工序;化学镀使铜离子在碱性环境下被甲醛还原成金属铜,附着在活化后的碳纤维表面活性位点之上。采用扫描电镜和透射电镜表征铜镀层的微观结构,通过冷热循环试验方法检测其附着力,并通过万用表测试了碳纤维表面铜镀层的电阻值。结果表明:经过预处理粗化后的碳纤维表面形成了具有凹凸不平的结构,由于活性晶核的弥散分布,诱导铜原子的靶向沉积,得到均匀、细密、完整的镀层。该镀层具有较强的附着力,通过冷热交替试验未发生脱落,且镀层导电性能良好,1 cm长度范围下的电阻值小于0.2Ω。该方法得到的铜镀层性能优于电镀法,镀层完整性较高,未出现"黑芯"问题,对于疏水表面的碳纤维材料具有较强的适用性。
In order to solve the problem of"black core"appearing on the surface of carbon fiber electroplating copper,this papaer pretreated the surface of carbon fiber first,and then electroless copper plating,and achieved good results.By pretreatment and electroless plating,the copper coating was evenly distributed good results.By pretreatment and electroless plating,the copper coating was evenly distributed on the surface of carbon fiber,which enhanced the bonding strength between nonmetallic carbon and metallic copper.The method consists of the following steps:first,pretreatment,including degumming,degreasing,oxidation,sensitization and activation processes.Second,electroless plating,in which copper ions are reduced to copper by formaldehyde in an alkaline environment and attached to the activated carbon fiber surface active sites.Copper coating microstructure were characterized by scanning electron microscopy(SEM)and transmission electron microscopy(TEM),the adhesion by hot and cold cycle test method of detection,copper coating on the surface of the carbon fiber resistance by multimeter test,the results show that after pretreatment coarsening of the carbon fiber resistance by multimeter test,the results show that after pretreatment coarsening of the carbon fiber surface formed with uneven structure,due to the dispersion of active crystal nucleus distribution,induce targeted sedimentary copper stoms,uniform,fine and complete coating.The coating has strong adhesion,no shedding through the alternating heat and cold test,and the coating has good conductivity,the resistance value in the 1 cm length range is less than 0.2Ω.The copper coating obtained by this method has better performance than that obtained by electroplating method,higher integrity of the coating,no"black core"problem,and strong applicability to carbon fiber material on hydrophobic surface.
作者
陈明
CHEN Ming(Dongfeng Commercial Vehicle Technology Center,Wuhan 430056,China)
出处
《材料保护》
CAS
CSCD
北大核心
2020年第S01期37-41,共5页
Materials Protection
关键词
碳纤维
表面处理
化学镀铜
Carbon fiber
surface pretreatment
electroless plating
copper
作者简介
通讯作者:陈明(1981-),工程师,主要从事材料表面处理技术研究,电话:18062025730,E-mail:xf-chenming@dfcv.com.cn
