TY - JOUR AU - CHEN, Qin AU - ZHANG, Xinyue AU - LIU, Siyu AU - CHEN, Kai AU - FENG, Cunao AU - LI, Xiaowei AU - QI, Jianwei AU - LUO, Yong AU - LIU, Hongtao AU - ZHANG, Dekun PY - 2023 TI - Cartilage-bone inspired the construction of soft-hard composite material with excellent interfacial binding performance and low friction for artificial joints JO - Friction SN - 2223-7690 SP - 1177 EP - 1193 VL - 11 IS - 7 AB - 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. UR - https://doi.org/10.1007/s40544-022-0645-2 DO - 10.1007/s40544-022-0645-2