@article{CHEN2023, 
author = {Qin CHEN and Xinyue ZHANG and Siyu LIU and Kai CHEN and Cunao FENG and Xiaowei LI and Jianwei QI and Yong LUO and Hongtao LIU and Dekun ZHANG},
title = {Cartilage-bone inspired the construction of soft-hard composite material with excellent interfacial binding performance and low friction for artificial joints},
year = {2023},
journal = {Friction},
volume = {11},
number = {7},
pages = {1177-1193},
keywords = {friction, hydrogel, Ti6Al4V alloy, soft-hard interface},
url = {https://www.sciopen.com/article/10.1007/s40544-022-0645-2},
doi = {10.1007/s40544-022-0645-2},
abstract = {Inspired by the cartilage-bone structure in natural joints, soft-hard integrated materials have received extensive attention, which are the most promising candidates for artificial joints due to their combination of excellent load-bearing properties and lubricating properties. The latest progress showed that the combination of hydrogel and titanium alloy can realize a bionic natural joint lubrication system on the surface of titanium alloy. However, obtaining a tough interface between the hydrogel (soft and wet) and the titanium substrate (hard and dry) is still a great challenge. Here, we designed a "soft (hydrogel)-hard (Ti6Al4V)" integrated material with outstanding combination, which simulates the structure and function of cartilage-bone in the natural joint. The load-bearing properties, binding performance, and tribological behaviors for different forms of the soft-hard integrated materials were investigated. The results showed that the hydrogel layer and Ti6Al4V substrate possess ultra-high interfacial toughness (3,900 J/m2). In addition, the combination of the hydrogel layer and Ti6Al4V substrate provided a good lubrication system to endow the "soft (hydrogel)-hard (Ti6Al4V)" integrated material with high load-bearing and excellent tribological properties. Therefore, this study provided an effective strategy for prolonging the service life of Ti6Al4V in the biomedical field.}
}