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Polystyrene Nanospheres Modified with a Hydrophilic Polymer Brush through Subsurface‐Initiated Atom Transfer Radical Polymerization as Biolubricating Additive
Author(s) -
Feng Haiyan,
Ma Zhengfeng,
Zhang Yujue,
Liu Fengzhen,
Ma Shuanhong,
Zhang Ran,
Cai Meirong,
Yu Bo,
Zhou Feng
Publication year - 2020
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.202000135
Subject(s) - materials science , polystyrene , polymer , atom transfer radical polymerization , composite material , tribology , lubricity , shearing (physics) , lubrication , polymerization , radical polymerization , chemical engineering , engineering
Hydration lubrication plays an important role including the cartilage of an organism. Here, polystyrene nanospheres modified with a hydrophilic polymer through subsurface‐initiated grafting as a biolubricating additive is proposed. The material provides good tribological performance when subjected to high load. Compared with surfaced‐initiated grafting polymer brushes, subsurface initiation can form much thicker hydration layers to obtain a lower friction coefficient and better mechanical properties for withstanding prolonged shearing forces with less measurable damage. The polymer brushes penetrate through the covalent network of the polystyrene nanospheres providing a match in mechanical properties between them, so that the additives obtain more excellent lubricity in an aqueous environment under shear pressure, which is expected to become a promising artificial joint biolubricating additive.