Derivatization, characterization, and tribological behavior of an amine-terminated polymer surface
Derivatization, characterization, and tribological behavior of an amine-terminated polymer surface
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胺封端聚合物表面的衍生化、表征和摩擦学行为
DOI：
10.1016/j.apsusc.2003.12.004
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发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
Yapu Zhao
中科院分区：
文献类型：
--
作者：
Sili Ren;Shengrong Yang;Yapu Zhao
研究了端胺聚合物表面的衍生化、表征和微摩擦学行为。因此，七氟丁酸酐（HFBA）衍生的薄膜，其特征在于通过接触角测量和X射线光电子能谱（XPS）。结果发现，HFBA衍生的膜在化学酰胺键的存在下在PEI表面上产生。摩擦学性能进行了表征。聚合物PEI膜具有相对高的粘附力、摩擦力和差的抗磨能力，而HFBA衍生的聚合物膜具有仅约5.5nN的非常低的粘附力（使用曲率半径约50nm的锥形Si3N4尖端来测量粘附力），其比硅衬底表面的粘附力低一个数量级以上。此外，HFBA衍生的膜具有良好的减摩能力和热稳定性。因此，通过化学吸附低表面能分子来改善聚合物薄膜的摩擦学性能是一种很好的替代方法。这使得衍生化聚合物薄膜在解决微机电系统（MEMS）摩擦学问题上具有广阔的应用前景。
The derivatization, characterization, and micro-tribological behavior of an amine-terminated polymer surface were investigated. Thus, the heptafluorobutyric anhydride (HFBA) derivatized film was characterized by means of contact-angle measurement and X-ray photoelectron spectroscopy (XPS). It was found that the HFBA-derivatized film was generated on the PEI surface in the presence of a chemical amide bond. The tribological properties were characterized as well. The polymer PEI film had relative high adhesion, friction, and poor anti-wear ability, while the HFBA-derivatized polymer film possessed a very low adhesive force of only about 5.5nN (a pyramidal Si3N4tip with radius of curvature about 50nm was used to measure the adhesion), which was more than an order of magnitude lower than that of the silicon substrate surface. Besides, the HFBA-derivatized film registered good friction-reducing ability and thermal stability. Thus, a good alternative method was presented to improve the tribological properties of polymer film by chemisorbing molecules with low surface energy. This makes it feasible for the derivatized polymer film to find promising application in resolving the tribological problems of micro-electromechanical systems (MEMS).
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