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作者:

Liu, Mengmeng (Liu, Mengmeng.) | Ni, Jing (Ni, Jing.) | Zhang, Caixia (Zhang, Caixia.) | Wang, Lihui (Wang, Lihui.) | Guo, Yue (Guo, Yue.) | Liu, Zhifeng (Liu, Zhifeng.)

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EI Scopus SCIE

摘要:

Polymer coatings can effectively improve the surface tribological properties of human implant materials, thereby increasing their service life. In this study, poly(vinylsulfonic acid, sodium salt) (PVS), poly(acrylic acid) (PAA) and poly(vinylphosphonic acid) (PVPA) were used to modify Ti6Al4V surfaces. Experimental analyses were combined with molecular simulation to explore the regulation mechanism of special functional groups contained in polymer molecular chains on the tribological properties of modified surfaces. In addition, the bearing capacities and velocity dependence of different polymer modified surfaces during friction were also explored. The PVS coating, due to physical adsorption, can have an anti-friction effect under NaCl solution lubrication, but is not durable under long-term or repeated usage. Both PAA and PVPA molecular chains can form chemical bonds with Ti6Al4V. Phosphate acid groups can firmly bind to the substrate, and the adsorption of salt ions and water molecules can form a hydrated layer on the PVPA coating surface, achieving ultra-low friction and wear. The adsorption of salt ions would aggravate the surface wear of the PAA-modified Ti6Al4V due to the unfirm binding of carboxyl groups to the substrate, resulting in a high friction coefficient. This study can provide effective guidance for the design of modified polymer coatings on metals.

关键词:

functional groups of polymers tribological properties surface modification molecular simulation Ti6Al4V experimental analyses

作者机构:

  • [ 1 ] [Liu, Mengmeng]Hangzhou Dianzi Univ, Sch Mech Engn, Hangzhou 310018, Peoples R China
  • [ 2 ] [Ni, Jing]Hangzhou Dianzi Univ, Sch Mech Engn, Hangzhou 310018, Peoples R China
  • [ 3 ] [Guo, Yue]Hangzhou Dianzi Univ, Sch Mech Engn, Hangzhou 310018, Peoples R China
  • [ 4 ] [Zhang, Caixia]Beijing Univ Technol, Inst Adv Mfg & Intelligent Technol, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Lihui]Beijing Univ Technol, Inst Adv Mfg & Intelligent Technol, Beijing 100124, Peoples R China
  • [ 6 ] [Liu, Zhifeng]Jilin Univ, Key Lab CNC Equipment Reliabil, Minist Educ, Changchun 130012, Peoples R China

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来源 :

POLYMERS

年份: 2023

期: 20

卷: 15

5 . 0 0 0

JCR@2022

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