Yin Wei, Shan Lei, Lu Hongyu, Zheng Yelong, Han Zhiwu, Tian Yu
State Key Laboratory of Tribology, Tsinghua University, China.
Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, China.
Sci Rep. 2016 Jul 18;6:30090. doi: 10.1038/srep30090.
Biological materials immersed in vegetable and mineral oil, such as rattan armor and wooden sleepers, have been extensively used since ancient times because of their excellent mechanical properties. This study quantitatively investigated the viscoelasticity and tribological performance of lignum vitae immersed in poly-alpha-olefin (PAO) and tung oils (Aleuritesfordii Hemsl.) to reveal the mechanism of impact resistance. The acceleration of samples immersed in tung oil was higher than that of dry and PAO-immersed samples in the first impact. The elastic modulus of the samples immersed in tung oil increased slightly. The impact damage on the samples immersed in tung oil was reduced because of the low friction coefficient (0.07) resulted in a low wear rate. The extent of impact damage on the samples immersed in tung oil was approximately 34% and 58% lower than that on the dry and PAO oil-immersed samples, respectively, under an angle of 20° and a height of 10 cm. The impact damage on the PAO-immersed samples was reduced because of low friction coefficient. However, impact damage increased because of large elastic modulus. The findings of this study can serve as a reference for the application of modified biological materials with high strength and wear resistance.
浸在植物和矿物油中的生物材料，如藤甲和木枕，由于其优异的机械性能，自古以来就被广泛使用。本研究定量研究了浸在聚α-烯烃（PAO）和桐油（油桐）中的愈创木的粘弹性和摩擦学性能，以揭示其抗冲击机理。在第一次冲击中，浸在桐油中的样品的加速度高于干燥和浸在PAO中的样品。浸在桐油中的样品的弹性模量略有增加。浸在桐油中的样品受到的冲击损伤减少，这是因为低摩擦系数（0.07）导致磨损率低。在20°角和10厘米高度下，浸在桐油中的样品的冲击损伤程度分别比干燥和浸在PAO油中的样品低约34%和58%。浸在PAO中的样品受到的冲击损伤减少是因为摩擦系数低。然而，由于弹性模量大，冲击损伤增加。本研究结果可为高强度、耐磨改性生物材料的应用提供参考。
