石墨烯复合浆料应用于ABS塑料电镀前表面处理

采用石墨烯等碳纳米材料与溶剂及多种助剂混合研磨，制备了稳定的石墨烯复合导电浆料。将导电浆料喷涂于丙烯腈?丁二烯?苯乙烯共聚物（ABS）表面获得ABS/石墨烯材料，赋予ABS塑料优良的导电性能，继而进行电镀处理。为了提高石墨烯涂层与ABS塑料表面的结合力，对ABS塑料进行了不同的表面处理，包括磨砂、有机溶剂微腐蚀和化学粗化的方法。结果表明，经过不同表面粗化处理的ABS塑料表面形成微孔，亲水性得到提高，其中化学粗化法还可以使ABS塑料表面产生亲水基团，从而大大提高石墨烯涂层的附着力；ABS/石墨烯的电阻范围在0.3~5 kΩ内，具有良好的导电性，电镀后所得产品具有良好的金属光泽，镀层包覆完整不易脱落。

Application of Graphene Paste for Surface Treatment of ABS Prior to Electroplating

The graphene and other carbon nanomaterials were mixed and ground with solvents and various additives to prepare a stable graphene composite conductive paste. This conductive paste was sprayed on the surface of acrylonitrile?butadiene?styrene copolymer （ABS） to provide excellent electrical conductance for ABS， followed by an electroplating treatment. To improve the bonding force between the graphene coating and the surface of ABS， different surface treatments were carried out for the ABS， which included the matte， organic solvent micro?corrosion and chemical roughening methods. The results indicated that the surface roughening treatments resulted in the formation of micropores on the plastic surface， leading to an enhancement in hydrophilicity. The chemical roughening method also produced some hydrophilic groups on the plastic surface， thus greatly improving the adhesion of the graphene coating. The ABS/graphene system presented good electrical conductance with a resistance range of 0.3~5 kΩ. The products obtained from electroplating exhibited good metal luster， and their coating layers were intact and not easy to fall off.