Fretting Wear Behavior of PVA-Based Hydrogels Under Dry Friction

IF 3.3 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2025-06-03 DOI:10.1007/s11249-025-02013-z

Fei Xu, Liao-Liang Ke, Jie Su

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Abstract

Hydrogels are ideal substitute materials for articular cartilage. The fretting wear behavior of polyvinyl alcohol (PVA) hydrogel and three types of PVA-based composite hydrogels under dry friction condition is investigated experimentally. Polyvinyl pyrrolidone (PVP), graphene oxide (GO), and multi-walled carbon nanotubes (MWCNTs) are mixed into PVA hydrogels as additives to prepare three composite hydrogels. A sphere-on-flat contact model is established between the PVA-based hydrogel coating and a stainless steel ball. The reciprocating fretting wear equipment is used to conduct fretting tests. Surface wear morphology and wear depth are characterized using three-dimensional (3D) ultra-depth of field microscopy and 3D white-light interference profilometer. The impacts of displacement amplitude, normal force, exposure time, and the number of freeze–thaw cycles on fretting wear behavior of four PVA-based hydrogels are investigated. The results show that the PVA/MWCNTs composite hydrogel exhibits the highest friction coefficient and relatively good wear resistance.

Graphical Abstract

Abstract Image

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干摩擦下聚乙烯醇基水凝胶的微动磨损行为

水凝胶是关节软骨的理想替代材料。实验研究了聚乙烯醇（PVA）水凝胶和三种聚乙烯醇基复合水凝胶在干摩擦条件下的微动磨损行为。将聚乙烯吡咯烷酮（PVP）、氧化石墨烯（GO）和多壁碳纳米管（MWCNTs）作为添加剂加入PVA水凝胶中，制备了三种复合水凝胶。建立了聚乙烯醇基水凝胶涂层与不锈钢球的平面球接触模型。采用往复微动磨损装置进行微动试验。利用三维超景深显微镜和三维白光干涉轮廓仪对表面磨损形貌和磨损深度进行了表征。研究了位移幅度、法向力、暴露时间和冻融循环次数对四种pva基水凝胶微动磨损性能的影响。结果表明，PVA/MWCNTs复合水凝胶具有最高的摩擦系数和较好的耐磨性。图形抽象

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.