表面接枝仿生聚合物刷的润滑性能研究进展EI北大核心CSCD

关节软骨表面刷状的水溶性生物大分子赋予了人体关节优异的润滑性能。受此启发,表面接枝仿生聚合物刷被广泛研究,已经成为改善材料表界面润滑性能的有效手段。然而,目前依旧缺乏关于仿生聚合物刷提高润滑性能研究进展的综述研究。先介绍物理吸附和化学键合两种接枝仿生聚合物刷的表面修饰方法,并比较它们在改善表界面润滑性能方面的优缺点。然后详细论述三种带有不同电荷的仿生聚合物刷(中性聚合物刷、聚阴/阳离子刷和聚两性离子刷)的结构及其对润滑性能的调控作用,探讨其摩擦界面的润滑机制,并总结在构建高润滑性能表界面方面的最新研究进展。最后展望仿生聚合物刷在生物界面润滑领域的未来发展趋势。相关讨论可以为开发具有优异润滑性能的新型仿生材料提供参考。

Research Progress on the Lubrication Properties of Surface-grafted Biomimetic Polymer Brushes

The brush-like water-soluble biomolecules on the surface of articular cartilage endow human joints with excellent lubrication. Inspired by nature, surface-grafted biomimetic polymer brushes have been extensively studied and have become an effective means to improve the lubrication properties of material surfaces and interfaces. This paper reviews on the research progress of biomimetic polymer brushes for improving lubrication performance. Firstly, two surface-modification methods of grafting biomimetic polymer brushes, namely, physisorption and chemical bonding, are introduced. Their advantages and disadvantages in improving lubrication properties of surfaces and interfaces are discussed. Then, the structures of three types of biomimetic polymer brushes with different charges (neutral polymer brushes, polyanionic / polycationic brushes and polyzwitterionic brushes) and their regulation of lubrication properties are discussed. The underlying lubrication mechanisms at the friction interfaces are highlighted. The recent research progress in constructing surfaces and interfaces with high lubrication properties is summarized. Finally, the future directions of biomimetic polymer brushes in the field of bio-interface lubrication are prospected.