Li Feng, Wang Anmin, Wang Chengtao
College of Electromechanical Engineering, Qingdao University of Science and Technology, No. 99 Song Ling Road, Laoshan District, Qingdao, 266061, People's Republic of China.
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai, 200240, People's Republic of China.
J Mater Sci Mater Med. 2016 May;27(5):87. doi: 10.1007/s10856-016-5700-y. Epub 2016 Mar 12.
Many biomaterials are being used to repair damaged articular cartilage. In particular, poly vinyl alcohol hydrogel has similar mechanical properties to natural cartilage under compressive and shearing loading. Here, three-factor and two-level friction experiments and long-term tests were conducted to better evaluate its tribological properties. The friction coefficient between articular cartilage and the poly vinyl alcohol hydrogel depended primarily on the three factors of load, speed, and lubrication. When the speed increased from 10 to 20 mm/s under a load of 10 N, the friction coefficient increased from 0.12 to 0.147. When the lubricant was changed from Ringer's solution to a hyaluronic acid solution, the friction coefficient decreased to 0.084 with loads as high as 22 N. The poly vinyl alcohol hydrogel was severely damaged and lost its top surface layers, which were transferred to the articular cartilage surface. Wear was observed in the surface morphologies, which indicated the occurrence of surface adhesion of bovine cartilage. Surface fatigue and adhesive wear was the dominant wear mechanism.
许多生物材料正被用于修复受损的关节软骨。特别是，聚乙烯醇水凝胶在压缩和剪切载荷下具有与天然软骨相似的力学性能。在此，进行了三因素两水平摩擦实验和长期测试，以更好地评估其摩擦学性能。关节软骨与聚乙烯醇水凝胶之间的摩擦系数主要取决于载荷、速度和润滑这三个因素。当在10 N的载荷下速度从10 mm/s增加到20 mm/s时，摩擦系数从0.12增加到0.147。当润滑剂从林格氏液变为透明质酸溶液时，在高达22 N的载荷下摩擦系数降至0.084。聚乙烯醇水凝胶严重受损并失去其表层，这些表层转移到了关节软骨表面。在表面形态中观察到磨损，这表明牛软骨发生了表面粘附。表面疲劳和粘着磨损是主要的磨损机制。
