| 摘要: |
| 化学镀是ABS塑料表面金属化最常用的方法之一，但在施镀前需要使用钯等贵金属对基体进行活化，使其具有催化活性。以NiSO4与NaH2PO2混合配制活化液，涂覆于塑料基体表面，常温放置8~10 min后，基体表面形成一层活化层；用激光均匀扫描基体表面，活化层在激光作用下反应生成活性Ni微粒使基体活化，再进行化学镀镍。采用正交试验优化激光活化各参数，通过扫描电镜对各阶段基体表面形貌进行表征，利用能谱和X衍射对活化及施镀后的基体表面成分进行分析，采用高低温冲击法检测镀层结合性。结果表明，当NiSO4与NaH2PO2浓度分别为10 g/L和40 g/L，光斑直径为1 mm，扫描速率为5 mm/s，涂覆次数为2次时，镀覆效果最好；基体活化后，表面附着一层均匀的平均直径为30 nm的活性Ni微粒催化核心；施镀后，镀层均匀致密，结合性较好。 |
| 关键词: ABS塑料 激光活化 化学镀镍 |
| DOI：10.11933/j.issn.1007-9289.20170808001 |
| 分类号: |
| 基金项目:四川省教育厅重点项目（14zd1114） |
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| Laser Assisted Palladium Free Activation Process for Electroless Nickel Plating on ABS Plastics |
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DAI Jing-xiong, ZHONG Liang, GONG Wei, CUI Kai-fang
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College of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621000, Sichuan
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| Abstract: |
| Electroless plating is one of the most commonly used methods for the surface metallization of ABS plastic, but it is necessary to use palladium and other precious metals to activate the substrate before plating to get catalytic activity. The active layer was prepared by mixing NiSO4 and NaH2PO2 on the surface of the plastic substrate. After standing for 8-10 min at the room temperature, the active layer was formed on the surface of the substrate. The surface of the substrate was then irradiated by laser, and the active layer reacted under the action of laser to produce active Ni particles to activate the matrix, and finally, electroless nickel plating was carried out. The surface morphology and composition of the substrate was characterized by scanning electron microscopy (SEM), energy spectrum and X-ray diffraction. The bonding strength of the plating layer was analyzed by high and low temperature impact method. The results show that the optimal plating parameters are as follows: the concentrations of NiSO4 and NaH2PO2 are 10 g/L and 40 g/L, respectively, the spot diameter is 1 mm, the scanning rate is 5 mm/s, and the coating times is 2 times. The surface is covered with a uniform average diameter of 30 nm Ni particles catalytic core; after plating, the coating with good combination is uniform and compact. |
| Key words: ABS plastic laser activation electroless nickel plating |
