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Electroless Plating of Plastics Activated with Mixed Hydroxide Colloids

用混合氢氧化物胶体活化的塑料化学镀

基本信息

批准号：
02650489
负责人：
IWAI Masao
金额：
$ 1.34万
依托单位：
Toyama National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650489/
关键词：
Electroless Plating Plastic Activation Colloid Aggregates Zeta-potential

项目摘要

The applicability of a method of acivation using mixed hydroxide colloids was studied for the electroless plating of Cu, Ni, Co and Ni-Co alloy onto various plastics. Furthermore, zeta-potentials were measured for various oxides to understand the mechanism of the activation process.The main results were as followed :(1) The isoelectric points Of SiO_2, ZrO_2, CuO, NiO, Cu(OH)_2 and Ni(OH)_2 were found to be 3.35, 4.6, 6.0, 7.7, 7.8 and 8.7 respectively. Also the plastics used in the present work were found to be charged negatively.(2) The adsorbtion of hydroxide colloid onto ABS plastic is infl enced by the temperature of the colloidal solution, suggesting the activation process is chemical adsorbtion.(3) The plastics, including ABS, PP, PE, PS, PC, PVC were satisfactorily activated with colloid aggregates of Ni(OH)_2-Cu(OH)_2 for electroless plating of copper. This activation method was also found to be applicable to the electroless plating of Ni, Co and Ni-Co alloy on ABS plastics.(4) The adhesion strength and brightness of Cu or Ni films formed on the ABS plastic were amply competitive with those activated by a conventiona SnCl_2-PdCl_2 method.(5) The copper films formed on ABS plastic, activated with mixed colloids prepared with Na_2CO_3 solution were good in brightness and adhesion force compared with those activated with mixed colloids the prepared with NAOH solution.(6) The catalytic effect of copper electrode for the anodic oxidation of HCHO solution was found to be large compared with that of Ni electrode.(7) The mechanism of the process of activation of plastics can be explaned by surface electrochemistry.

研究了混合氢氧化物胶体活化法在不同塑料表面化学镀铜、镍、钴和镍钴合金的适用性。结果表明：(1)SiO_2、ZrO_2、CuO、NiO、Cu(OH)_2和Ni(OH)_2的等电点分别为3.35、4.6、6.0、7.7、7.8和8.7。(2)氢氧化物胶体在ABS塑料上的吸附受胶体溶液温度的影响，表明活化过程为化学吸附。(3)Ni(OH)_2-Cu(OH)_2胶体聚集体对ABS、PP、PE、PS、PC、PVC等塑料的活化效果令人满意。这种活化方法也适用于在ABS塑料上化学镀Ni、Co和Ni-Co合金。(4)在ABS塑料上形成的铜或镍膜的结合强度和亮度与传统的SnCl2-PdCl2方法活化的膜相当。(5)在ABS塑料上形成的铜膜用Na2CO3溶液制备的混合胶体活化比用NaOH溶液制备的混合胶体活化具有更好的白度和附着力。(6)铜电极对甲醛溶液的阳极氧化的催化作用比镍电极大。(7)塑料的活化过程可以用表面电化学来解释。