材料期刊网

采用有机镀膜技术和三嗪硫醇类有机单体在Mg--Mn--Ce镁合金表面生成了具有疏水特性的有机纳米薄膜。选取循环伏安法曲线中不同特征点研究了有机镀膜的反应机理,借助傅里叶变换红外光谱仪、X射线光电子能谱仪、椭圆偏振光谱仪和接触角测量仪表征了有机镀膜后镁合金表面薄膜的特性。结果表明, 有机镀膜过程分为电化学反应成膜和膜层层间聚合反应增厚两个阶段;镁合金与有机物单体通过化学键发生结合;随着有机镀膜反应过程的进行薄膜的厚度由9.14 nm逐渐增加到64.51 nm, 形成稳定的纳米薄膜；有机镀膜后镁合金表面的蒸馏水接触角从未镀膜的45.8^o上升到117.9^o, 实现了由亲水到疏水的功能特性转换。

The polymeric nano film with hydrophobic feature on the surface of Mg–Mn–Ce magnesium alloy was prepared through chemical reaction with synthesized organic monomer of the triazine dithiol  monosodium reacted with magnesium alloy by self–developed technique of polymer plating. The reaction mechanism during polymer plating was investigated with selected characteristic points from the curves of cyclic voltammetry. The film properties polymer–plated on magnesium alloy surface were characterized by means of FT–IR spectrometer, X–ray photoelectron spectroscopy, spectroscopic ellipsometer and contact angle meter. The results showed that the process of polymer plating included the film formation through the electrochemical reaction and film thickening by polymerization reaction between film layers. The combination between magnesium alloy and the monomer of triazine dithiol monosodium were achieved by chemical bonds. Film thickness increased gradually from 9.14 nm to 64.51 nm during the reaction process of polymer plating, and then the stabilized nano–scale film formed. Contact angle of distilled water for polymer–plated magnesium alloy rose to 117.9^o as compared with 45.8^o  for the substrate; therefore the conversion of functional performance was achieved from hydrophilic to hydrophobic.