铁粉法与甲醛法在石墨粉表面化学镀铜的工艺对比

Processing Technology of Electroless Copper Plating on Graphite Powder by Iron Powder and Formaldehyde

摘要: 研究比较了两种化学方法——铁粉法和甲醛法在石墨粉表面镀铜的工艺.结果表明：铁粉法使用混合表面活性剂对石墨粉预处理,40~60 ℃搅拌下缓慢加入镀液,在pH为1.5~2.0下镀覆15~20 min, 50 ℃干燥可以制备出含铜25%~75%、镀覆效果好的镀铜石墨粉:甲醛法要求对石墨粉敏化、活化、工艺复杂、成本高、副反应产物具有毒性,且铜含量较低的试样镀覆效果不如铁粉法制备的试样.铁粉法镀覆效果好、工艺简单、无毒,列为首选方法.

Abstract: The processing technology of electroless copper plating on graphite powders by iron powder method and formaldehyde method were studied and evaluated.The iron powder method could produce highly covered copper/graphite powders with 25%-75% copper under processing following conditions:graphite powders being pretreated by complex surfactants,plating solution added slowly,graphite and iron powders agitated at 40-60 ℃,electroless copper plated for 15-20 minutes at 1.5-2.0 pH and dried at 50 ℃.Sensitization and activation processes were very important stages in formaldehyde method.Because of the expensive reagent and low covering rate of copper/graphite powders and poisonous by-product in the formaldehyde method,the iron powder method is recommended.