It is well known that pure polymeri

It is well known that pure polymeric materials by themselvescannot be used for high-performance applications in every fieldowing to their inadequate properties. In addition, the modificationof substrate surfaces is essential for numerous applications.[1] A polymer brush is an assembly of polymer chainsthat are tethered at one end to a surface or an interface.[2] Thegrafting of polymer brushes on a substrate surface provides apractical tool for surface modification and functionalization.With the aim of not influencing the mechanical properties ofa given substrate, the modification of the substrate with graftedpolymer brushes can significantly affect the surface properties,such as friction, adhesion, wettability, and biocompatibility.[3]Furthermore, the real importance of such a modification isthat it provides a method to enhance the surface propertieswhile maintaining the original matrix performance. However,the method of grafting polymer brushes still faces some obstacles;for example, poor robustness has become a bottleneck forlarge-scale biomedical, industrial, or clinical applications of themodified surfaces.At present, surface modification methods of polymeric substratescan be divided into physical and chemical methods.