Kim Chang-Lae, Kim Dae-Eun
Center for Nano-Wear, School of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
Sci Rep. 2016 Mar 24;6:20563. doi: 10.1038/srep20563.
A coating based on collagen with self-healing properties was developed for applications in mechanical components that are prone to abrasion due to contact with a counter surface. The inherent swelling behavior of collagen in water was exploited as the fundamental mechanism behind self-healing of a wear scar formed on the surface. The effects of freeze-drying process and water treatment of the collagen coatings on their mechanical and self-healing properties were analyzed. Water was also used as the medium to trigger the self-healing effect of the collagen coatings after the wear test. It was found that collagen coatings without freeze-drying did not demonstrate any self-healing effect whereas the coatings treated by freeze-drying process showed remarkable self-healing effect. Overall, collagen coatings that were freeze-dried and water treated showed the best friction and self-healing properties. Repeated self-healing ability of these coatings with respect to wear scar was also demonstrated. It was also confirmed that the self-healing property of the collagen coating was effective over a relatively wide range of temperature.
开发了一种具有自修复性能的基于胶原蛋白的涂层，用于因与相对表面接触而容易磨损的机械部件。胶原蛋白在水中固有的膨胀行为被用作表面形成的磨损疤痕自修复背后的基本机制。分析了胶原蛋白涂层的冷冻干燥过程和水处理对其机械性能和自修复性能的影响。在磨损试验后，水也被用作触发胶原蛋白涂层自修复效果的介质。结果发现，未经冷冻干燥的胶原蛋白涂层没有表现出任何自修复效果，而经过冷冻干燥处理的涂层则表现出显著的自修复效果。总体而言，经过冷冻干燥和水处理的胶原蛋白涂层表现出最佳的摩擦和自修复性能。还证明了这些涂层对磨损疤痕具有重复自修复能力。还证实了胶原蛋白涂层的自修复性能在相对较宽的温度范围内有效。
