Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, and School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, China.
Langmuir. 2013 May 21;29(20):5968-73. doi: 10.1021/la400321k. Epub 2013 May 9.
The present study aimed to evaluate the surface etching of the acrylonitrile-butadiene-styrene (ABS) resin in the MnO2-H3PO4-H2SO4 colloid. To enhance the soluble Mn(IV) ion concentration and improve the etching performance of ABS resin, H3PO4 was added as a complexing agent into the MnO2-H2SO4 etching system. The effects of the H2SO4 concentration and etching time on the surface topography, surface roughness, adhesion strength, and the surface chemistry of the ABS substrates were investigated. The optimal oxidation potentials of MnO2 in the colloids decreased from 1.426 to 1.369 V with the addition of H3PO4. Though the etching conditions changed from 70 °C for 20 min to 60 °C for 10 min, the adhesion strength between the ABS substrates and electroless copper film increased from 1.19 to 1.33 KN/m after etching treatment. This could be attributed to the significant increase of the soluble Mn(IV) ion concentration in the MnO2-H3PO4-H2SO4 colloid. The surface chemistry results demonstrated that the oxidation reaction of -C═C- bonds in the polybutadiene phase was accelerated in the etching process by the addition of H3PO4, and the abundant -COOH and -OH groups were formed rapidly on the ABS surface with the etching treatment. These results were in agreement with the results of surface scanning electron microscopic observations and adhesion strength measurement. The results suggested that the MnO2-H3PO4-H2SO4 colloid was an effective surface etching system for the ABS surface roughness.
本研究旨在评估 MnO2-H3PO4-H2SO4 胶体对丙烯腈-丁二烯-苯乙烯（ABS）树脂的表面蚀刻作用。为了提高可溶性 Mn(IV)离子浓度并改善 ABS 树脂的蚀刻性能，将 H3PO4 作为络合剂添加到 MnO2-H2SO4 蚀刻体系中。研究了 H2SO4 浓度和蚀刻时间对 ABS 基底表面形貌、表面粗糙度、附着力和表面化学性质的影响。随着 H3PO4 的加入，胶体中 MnO2 的最佳氧化电位从 1.426 V 降低至 1.369 V。尽管蚀刻条件从 70°C 20 分钟变为 60°C 10 分钟，但经过蚀刻处理后，ABS 基底和化学镀铜膜之间的附着力从 1.19 KN/m 增加到 1.33 KN/m。这可以归因于 MnO2-H3PO4-H2SO4 胶体中可溶性 Mn(IV)离子浓度的显著增加。表面化学结果表明，在蚀刻过程中添加 H3PO4 加速了聚丁二烯相中 -C═C-键的氧化反应，并且在蚀刻处理后，ABS 表面迅速形成了丰富的 -COOH 和 -OH 基团。这些结果与表面扫描电子显微镜观察和附着力测量的结果一致。结果表明，MnO2-H3PO4-H2SO4 胶体是一种有效的 ABS 表面粗糙度表面蚀刻系统。
