Biomimetic Lubrication and Surface Interactions of Dopamine-Assisted Zwitterionic Polyelectrolyte Coatings

Langmuir : the ACS Journal of Surfaces and Colloids
Linbo HanHongbo Zeng

Abstract

A bioinspired zwitterionic polyelectrolyte coating with excellent hydration ability has been regarded as a promising lubricating candidate for modifying artificial joint cartilage surface. In physiological fluids, the ubiquitous proteins play an important role in achieving outstanding boundary lubrication; however, a comprehensive understanding of the hydration lubrication between polyelectrolyte coatings and proteins still remains unclear. In this work, a facile fabrication of ultrasmooth polyelectrolyte coatings was developed via codeposition of synthesized poly(dopamine methacrylamide- co-2-methacryloyloxyethyl phosphorylcholine) (P(DMA- co-MPC)) and dopamine (DA) in a mild condition. Upon optimization of the feeding ratio of P(DMA- co-MPC) and DA, the as-fabricated PDA/P(DMA- co-MPC) coatings exhibit excellent lubricating properties when sliding with each other (friction coefficient μ = 0.036 ± 0.002, ∼2.8 MPa), as well as sliding with a model protein (bovine serum albumin (BSA)) layer (μ = 0.041 ± 0.005, ∼4.8 MPa) in phosphate-buffered saline (PBS, pH 7.4). Intriguingly, the lubrication in both systems shows Amontons-like behaviors: the friction is directly proportional to the applied load but independent of the shear velo...Continue Reading

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Citations

Feb 29, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Sihang LiuShengfu Chen
Jun 9, 2020·Chemistry, an Asian Journal·Minglun LiJing Yu
Feb 27, 2021·Biomaterials Science·Feifei WangHongbo Zeng
Feb 23, 2021·Bioactive Materials·Ying HanHongyu Zhang
Sep 25, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Sizhe LiuHongyu Zhang
Aug 23, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Lu GongHongbo Zeng
May 28, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Qiangbing WeiFeng Zhou
Sep 4, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yinqiang XiaRongxin Su
Jan 30, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Lu GongHongbo Zeng

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