Tribological properties of 100% cellulose nanofiber (CNF) molding under dry- and boundary lubrication-conditions at CNF/steel contacts
Tribological properties of 100% cellulose nanofiber (CNF) molding under dry- and boundary lubrication-conditions at CNF/steel contacts
复制标题
DOI：
10.1007/s10570-023-05309-2
复制
发表时间：
2023-06
期刊：
影响因子：
5.7
通讯作者：
H. Okubo;R. Nakae;D. Iba;K. Yamada;H. Hashiba;K. Nakano;K. Sato;S. Sasaki
中科院分区：
文献类型：
--
作者：
H. Okubo;R. Nakae;D. Iba;K. Yamada;H. Hashiba;K. Nakano;K. Sato;S. Sasaki
纤维素纳米纤维（CNFs）是一种植物源性材料，近年来因其重量轻、杨氏模量高等优异的力学性能而受到广泛关注。研制了100% CNF块状结构材料的新方法。然而，CNFs的摩擦学性能迄今尚未被研究，尽管它们的机械性能是已知的，并且与一些传统结构材料相当。在这项研究中，研究了一种新型生物质材料，100% CNF成型，在不同温度下，基于CNF/钢接触在干润滑和边界润滑条件下的摩擦学性能。摩擦试验结果表明，在干滑动条件下，CNF模塑的摩擦系数和磨损体积随CNF/钢摩擦副试验温度的升高而增大。相反，使用纯聚烯烃润滑时，摩擦和磨损性能没有明显的温度依赖性。表面分析结果表明，CNF成型的非晶化在磨损表面进行，特别是在高温干滑动条件下。结果表明，100% CNF成型材料的摩擦磨损性能与滑动试验条件密切相关，而成型材料的非晶化过程会影响其摩擦磨损性能。
Cellulose nanofibers (CNFs), which are plant-derived materials, have recently garnered considerable attention owing to their excellent mechanical properties, such as their low weight and high Young’s modulus. Novel methods for producing 100% CNF bulk structural materials have been developed. However, the tribological properties of CNFs have not been investigated thus far although their mechanical properties are known and are comparable to those of some conventional structural materials. In this study, the tribological properties of a novel biomass material, 100% CNF molding, were investigated based on CNF/steel contacts under dry and boundary lubrication conditions at various temperatures. The friction test results showed that the friction coefficient and wear volume of the CNF molding increased with the test temperature of the CNF/steel tribopair under dry-sliding conditions. Conversely, no significant temperature dependence of the friction and wear properties was observed upon lubrication with a pure polyalfaolefin. The surface analytical results revealed that the amorphization of the CNF molding progressed on the worn surface, especially under dry-sliding conditions at a high temperature. All the results suggested that the friction and wear performance of the 100% CNF moldings strongly depends on the sliding test conditions, and the amorphization process of the CNF molding can affect its friction and wear performance.