Friction Laws for Saturated/Unsaturated Fatty Acid Layers
Friction Laws for Saturated/Unsaturated Fatty Acid Layers
复制标题
DOI：
10.1007/s11249-021-01419-9
复制
发表时间：
2021-06-01
影响因子：
3.2
通讯作者：
Cayer-Barrioz, Juliette
中科院分区：
文献类型：
--
作者：
Abouhadid, Fadlallah;Crespo, Alexia;Cayer-Barrioz, Juliette
根据法向力，通过边界膜的摩擦响应检查羧酸碳链中是否存在不饱和度。使用源自表面力装置的分子摩擦计，将摩擦定律建立为纳米级法向力的函数。虽然在所有研究的情况下，剪切面主要由甲基组成，但剪切面内的分子组织不同，正如同时膜厚度演变所表明的那样。这在界面内产生了耗散模式，导致了广泛的剪切应力水平和与接触压力的依赖性。讨论了摩擦定律，强调了纳米表面粗糙度和分子不饱和度的综合作用。[图形]。
The presence or absence of unsaturation in the carbon chain of carboxylic acids was examined on the friction response of boundary films according to normal force. Friction laws were established as a function of the normal force at the nanoscale with a molecular tribometer derived from a surface force apparatus. While the shear plane is mainly composed of methyl groups in all the cases investigated, the molecular organization differs within the shear plane, as suggested by the simultaneous film thickness evolution. This gave rise to dissipation modes within the interface, resulting in a wide range of shear stress levels and dependence with contact pressure. The friction laws were discussed, highlighting the combined role of nanometric surface roughness and molecule unsaturation.[GRAPHICS].