氢键增强坚固的水凝胶承载和持续润滑

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-09-24 DOI:10.1016/j.triboint.2025.111233

Ruiyao Ma , Yanru Liu , Huijuan Lin , Ling-Bao Xing , Hui Liu , Shuanhong Ma , Feng Zhou

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引用次数: 0

摘要

仿生水凝胶具有最佳的摩擦和承载特性，是可植入人工材料的必要条件。利用强交联和分子间/分子内氢键合成了高刚度、高强度的聚甲基丙烯酰胺/甲基丙烯酸水凝胶（P(MAAm-MAAc)）。随后，在坚固的基底上形成一种嵌入式润滑层，形成类似关节软骨的层状结构。它具有独特的机械特性（抗拉强度：3.9-4.4 MPa；弹性模量：27.8-38.6 MPa），以及优越的润滑和承载能力。当水作为润滑剂时，水凝胶表现出低摩擦系数（COF ~ 0.039）、可忽略的磨损和超过18,000次滑动循环的持续耐久性。这种高刚度、高强度的多层水凝胶在仿生关节软骨、医疗器械等领域具有广泛的应用潜力。

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Hydrogen-bonding reinforced robust hydrogels for load-bearing and sustained lubrication

The creation of bionic hydrogel characterized by optimal friction and load-bearing is essential for implantable artificial materials. High-stiffness and robust poly (methylacrylamide and methacrylic acid) hydrogels (P(MAAm-MAAc)) were synthesized using intensive cross-linking and intermolecular/intramolecular hydrogen bonding. Subsequently, an embedded lubricating layer was developed on the robust base, which formed layered structure similar to articular cartilage. It possesses distinctive mechanical characteristics (tensile strength: 3.9–4.4 MPa; elastic modulus: 27.8–38.6 MPa), along with superior lubricating and load-bearing capabilities. When water served as lubricant, the hydrogels exhibited low friction coefficient (COF ∼ 0.039), negligible wear, and sustained endurance over 18,000 sliding cycles. This high-stiffness and robust multilayer hydrogel possesses extensive application potential in bionic articular cartilage, medical devices, and other domains.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.