研究了碱性条件下碳纤维表面化学镀镍工艺及机理。结果表明随着施镀温度的升高,pH值的增大,络合剂含量的减少,金属镍的沉积速率越大,但是镀液稳定性越差;碳纤维表面化学镀镍过程有明显的诱导期、加速期、减速期和稳定期4个阶段,并且当沉积时间过长、温度过高、pH值越大时,镀层出现胞状沉积结构。实验条件下,反应速率方程V=K[OH-]a[Na6H5O7]b[Ni 2＋]c[H2PO2-]dexp（-Ea/RT）中的[OH-]反应级数a=0.26565,[Na6H5O7]的反应级数b=-0.23287,表面活化能Ea=61.034kJ/mol。
Kinetics and technology of Ni electroless plating on carbon fibers was studied.The result indicated that with an increase in deposition temperature or pH of the plating bath,or a decrease in stabilizer concentrations,the deposition rate increased but the stability of the bath became worse;there were obvious four stages in the deposition： initiation period,acceleration period,deceleration period,and stationary period.The tumor-like deposition shape formed in the surface of the plating,when the temperature or pH of plating bath was too high,or fibers were plated for too long time.During our study,the rate order of and [Na6H5O7] is a=0.26565 and b=-0.23287 in the reaction rate equation V=Ka[Na6H5O7]bc[H2PO-2]dexp（-Ea/RT）,and the surface energy Ea=61.034kJ/mol.
参考文献
| [1] | Rawal SP. .Interface structure in graphite-fiber-reinforced metal-matrix composites[J].Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films,2001(7):692-700. |
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