Double-network polyvinyl alcohol composite hydrogel with self-healing and low friction

被引:22
作者
Zhang, Zhouqiang [1 ]
Ye, Zishuo [1 ]
Hu, Feng [1 ]
Wang, Wenbo [2 ]
Zhang, Shoujing [1 ]
Gao, Li [3 ]
Lu, Hailin [1 ,3 ]
机构
[1] Xian Polytech Univ, Coll Mech & Elect Engn, Xian Key Lab Modern Intelligent Text Equipment, Grp Mech & Biomed Engn, Xian 710048, Shaanxi, Peoples R China
[2] Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China
[3] Jiaotong Univ, Dept Gynaecol & Obstet, Affiliated Hosp 1, Xian 710061, Shaanxi, Peoples R China
关键词
biomaterials; biosynthesis of polymers; differential scanning calorimetry; friction; wear and lubrication; GLYCEROPHOSPHATE HYDROGEL; ARTICULAR-CARTILAGE; NANOPARTICLES; LUBRICATION; BEHAVIOR; TISSUE; BIOTRIBOLOGY; DELIVERY; WEAR;
D O I
10.1002/app.51563
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Polyvinyl alcohol (PVA) hydrogel is considered the most promising candidate for artificial cartilage because of its good lubricity and low permeability. However, the efficacy of single-network PVA hydrogels under variable loads has not yet been determined. In this study, a one-step physical-cross-linking method was used to compose PVA/PEG double-network composite hydrogels. We changed the polyethylene glycol (PEG) content of the composite gel and tested the frictional-wear performance under different loads and speeds. With the mass fraction of PEG at 30 wt.%, the hardness of the PVA/PEG composite gel increased to 167.7% that of pure PVA. Under dry-friction conditions, the average coefficient of friction was approximately 0.14 and the wear rate on the surface of the hydrogel was insignificant. The cross-linking between PVA and PEG greatly enhanced the stability of the composite hydrogel polymer network. The structure of the composite gel was analyzed by a variety of standard methods. The hydrogel has excellent biocompatibility and self-healing ability and is a self-lubricating, self-healing candidate material for articular-cartilage repair.
引用
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页数:14
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