Constructing a biomimetic robust bi-layered hydrophilic lubrication coating on surface of silicone elastomer | |
Luyao Gao1,2; Xiaoduo Zhao1; Shuanhong Ma1; Zhengfeng Ma1; Meirong Cai1; Yong-Min Liang2; Feng Zhou1 | |
刊名 | Friction |
2021 | |
期号 | XXX页码:XXX |
关键词 | surface modification silicone elastomer layered lubrication coating hydrogels polyzwitterionic brush |
DOI | 10.1007/s40544-021-0513-5 |
英文摘要 | Silicone elastomers-based materials have been extensively involved in the field of biomedical devices, while their use is extremely restricted due to the poor surface lubricity and inherent hydrophobicity. This paper describes a novel strategy for generating a robust layered soft matter lubrication coating on the surface of the polydimethylsiloxane (PDMS) silicone elastomer, by entangling thick polyzwitterionic polyelectrolyte brush of poly (sulfobetaine methacrylate) (PSBMA) into the sub-surface of the initiator-embedded stiff hydrogel coating layer of P(AAm-co-AA-co-HEMA-Br)/Fe, to achieve a unified low friction and high load-bearing properties. Meanwhile, the stiff hydrogel layer with controllable thickness is covalently anchored on the surface of PDMS by adding iron powder to provide catalytic sites through surface catalytically initiated radical polymerization (SCIRP) method and provides high load-bearing capacity, while the topmost brush/hydrogel composite layer is highly effective for aqueous lubrication. Their synergy effects are capable of attaining low friction coefficient (COFs) under wide range of loaded condition in water environment with steel ball as sliding pair. Furthermore, the influence of mechanical modulus of the stiff hydrogel layer on the lubrication performance of layered coating is investigated, for which the COF is the lowest only when the modulus of the stiff hydrogel layer well matches the PDMS substrate. Surprisingly, the COF of the modified PDMS could remain low friction (COF < 0.05) stably after encountering 50,000 sliding cycles under 10 N load. Finally, the surface wear characterizations prove the robustness of the layered lubricating coating. This work provides a new route for engineering lubricious silicon elastomer with low friction, high load-bearing capacity, and considerable durability. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.cn/handle/362003/27792] |
专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Shuanhong Ma; Yong-Min Liang |
作者单位 | 1.Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 2.School of Chemistry and Chemical Engineering, Lanzhou University |
推荐引用方式 GB/T 7714 | Luyao Gao,Xiaoduo Zhao,Shuanhong Ma,et al. Constructing a biomimetic robust bi-layered hydrophilic lubrication coating on surface of silicone elastomer[J]. Friction,2021(XXX):XXX. |
APA | Luyao Gao.,Xiaoduo Zhao.,Shuanhong Ma.,Zhengfeng Ma.,Meirong Cai.,...&Feng Zhou.(2021).Constructing a biomimetic robust bi-layered hydrophilic lubrication coating on surface of silicone elastomer.Friction(XXX),XXX. |
MLA | Luyao Gao,et al."Constructing a biomimetic robust bi-layered hydrophilic lubrication coating on surface of silicone elastomer".Friction .XXX(2021):XXX. |
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