粗化是实现活化液在ABS表面吸附的前提和获得良好结合力的必要条件.采用含痕量钯离子的铬酐-硫酸粗化液对ABS塑料表面进行化学粗化,用AFM、XPS和胶体钯吸附量等对粗化前后塑料的表面性能、价键状态和活性进行了考察.结果表明:钯离子加入到粗化液中对ABS表面的粗糙度影响不显著,粗化后的表面氧含量升高;随着粗化液中钯离子浓度的增加,胶体钯在ABS表面上的吸附量增加;增加粗化液中的Pd含量可使ABS表面在低浓度胶体钯溶液中达到与高浓度钯相同的吸附量,有效地降低了胶体钯的浓度.粗化液中加入钯离子不影响基体与镀层的结合力.
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