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Volume 14
Issue 9
10.3390/coatings14091229
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Article

Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity

by
Xuxu Hu
,
Yu Zhao
,
Shuai Cheng
,
Jinming Zhen
,
Zhengfeng Jia
and
Ran Zhang
*
School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
*
Author to whom correspondence should be addressed.
Coatings 2024, 14(9), 1229; https://doi.org/10.3390/coatings14091229
Submission received: 27 August 2024 / Revised: 20 September 2024 / Accepted: 22 September 2024 / Published: 23 September 2024
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Abstract

Biomimetic hydrogel lubrication coatings with high wettability and low friction show great promise in tissue engineering, wound dressing, drug delivery, and intelligent sensing. Inspired by the hierarchical structure of natural cartilage, a layered hydrogel coating was constructed to functionalize rigid polyetheretherketone (PEEK). The layered hydrogel coating features a structural design comprising a top soft layer and a middle robust layer. The porous structure of the top soft hydrogel layer stores water molecules, providing surface lubrication, while the dense structure of the middle robust hydrogel layer offers load-bearing capacity. These synergistic effects of the gradient hydrogel layer endow the PEEK substrate with an ultra-low coefficient of friction (COF~0.010 at 5 N load), good load-bearing capacity (COF~0.031 at 10 N load), and excellent wear resistance (COF < 0.05 at 5 N load after 20,000 sliding cycles). This study introduces a novel design paradigm for robust hydrogel coatings with exceptional lubricity, displaying the potential application in cartilage replacement materials.
Keywords: surface modification; hydrogel coating; lubrication; load-bearing surface modification; hydrogel coating; lubrication; load-bearing

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MDPI and ACS Style

Hu, X.; Zhao, Y.; Cheng, S.; Zhen, J.; Jia, Z.; Zhang, R. Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity. Coatings 2024, 14, 1229. https://doi.org/10.3390/coatings14091229

AMA Style

Hu X, Zhao Y, Cheng S, Zhen J, Jia Z, Zhang R. Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity. Coatings. 2024; 14(9):1229. https://doi.org/10.3390/coatings14091229

Chicago/Turabian Style

Hu, Xuxu, Yu Zhao, Shuai Cheng, Jinming Zhen, Zhengfeng Jia, and Ran Zhang. 2024. "Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity" Coatings 14, no. 9: 1229. https://doi.org/10.3390/coatings14091229

APA Style

Hu, X., Zhao, Y., Cheng, S., Zhen, J., Jia, Z., & Zhang, R. (2024). Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity. Coatings, 14(9), 1229. https://doi.org/10.3390/coatings14091229

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