A robust low-friction triple network hydrogel based on multiple synergistic enhancement mechanisms

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Friction Pub Date : 2024-09-18 DOI:10.1007/s40544-024-0907-2
Xinyue Zhang, Qin Chen, Kai Chen, Cunao Feng, Haiyan Feng, Xiaowei Li, Dekun Zhang
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Abstract

Hydrogels exhibit promising applications, particularly due to their high water content and excellent biocompatibility. Despite notable progress in hydrogel technology, the concurrent enhancement of water content, mechanical strength, and low friction poses substantial challenges to practical utilization. In this study, employing molecular and network design guided based on multiple synergistic enhancement mechanisms, we have developed a robust polyvinyl alcohol (PVA)–polyacrylic acid (PAA)–polyacrylamide (PAAm) three-network (TN) hydrogel exhibiting high water content, enhanced strength, low friction, and fatigue resistance. The hydrogel manifests a water content of 63.7%, compression strength of 6.3 MPa, compression modulus of 2.68 MPa, tensile strength reaching 7.3 MPa, and a tensile modulus of 10.27 MPa. Remarkably, even after one million cycles of dynamic loading, the hydrogel exhibits no signs of fatigue failure, with a minimal strain difference of only 1.15%. Furthermore, it boasts a low sliding coefficient of friction (COF) of 0.043 and excellent biocompatibility. This advancement extends the applications of hydrogels in emerging fields within biomedicine and soft bio-devices, including load-bearing artificial tissues, artificial blood vessels, tissue scaffolds, robust hydrogel coatings for medical devices, and joint parts of soft robots.

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基于多重协同增强机制的稳健低摩擦三重网络水凝胶
水凝胶具有广阔的应用前景,特别是由于其含水量高、生物相容性好。尽管水凝胶技术取得了显著进展,但同时提高含水量、机械强度和低摩擦性对实际应用构成了巨大挑战。在本研究中,我们采用基于多种协同增强机制的分子和网络设计指导,开发出了一种坚固的聚乙烯醇(PVA)-聚丙烯酸(PAA)-聚丙烯酰胺(PAAm)三网络(TN)水凝胶,具有高含水量、增强强度、低摩擦和抗疲劳性能。该水凝胶的含水量为 63.7%,压缩强度为 6.3 兆帕,压缩模量为 2.68 兆帕,拉伸强度为 7.3 兆帕,拉伸模量为 10.27 兆帕。值得注意的是,即使经过一百万次动态加载,水凝胶也没有出现疲劳失效的迹象,应变差最小仅为 1.15%。此外,它还具有 0.043 的低滑动摩擦系数(COF)和出色的生物相容性。这一进步拓展了水凝胶在生物医学和软生物设备新兴领域的应用,包括承重人造组织、人造血管、组织支架、医疗设备的坚固水凝胶涂层以及软机器人的关节部位。
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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
期刊最新文献
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