Mussel-inspired construction of Ti6Al4V-hydrogel artificial cartilage material with high strength and low friction

Publication date: Available online 25 January 2020Source: Materials LettersAuthor(s): Kai Chen, Siyu Liu, Xiaofang Wu Data, Fengyan Wang, Guangyan Chen, Xuehui Yang, Linmin Xu, Jianwei Qi, Yong Luo, Dekun ZhangAbstractBased on the adhesion mechanism of polydopamine, the mussel-inspired hydrogel was prepared on the surface of the Ti6Al4V (Ti) with polydopamine (PDA), polyvinyl alcohol (PVA), hydroxyapatite (HA) and polyacrylic acid (PAA) as raw materials in this study, and the Ti-hydrogel artificial cartilage material was constructed. The hydrogel exhibited a tensile strength of 11.76 MPa, an elongation of 988.76%, and a creep deformation of only 0.035 mm under a 20 N load. The friction coefficient of the Ti6Al4V-hydrogel (Ti-hydrogel) artificial cartilage material decreased and the friction performance was improved. After the substrate was modified by the PDA, the bonding strength of the substrate to the hydrogel up to 6.64 MPa. Therefore, the mussel-inspired hydrogel is an ideal high-strength biomimetic cartilage material.
Source: Materials Letters - Category: Materials Science Source Type: research