脂肪酸羟胺皂在水中的减摩抗磨机理研究

特定结构的润滑添加剂脂肪酸羟胺皂不仅具有较好的油性，还有较好的抗磨作用。用四球试验、扫描电子显微镜(SEM)、俄歇能谱(AES)等手段研究了不同脂肪酸的羟胺皂在水体系下的摩擦学性能，提出了“物理吸附-混合胶柬-混合团聚”减摩抗磨机理。试验结果表明，脂肪酸羟胺皂形成润滑膜的强度随着直链碳数的增加而增强，随脂肪酸的烯键数目的增加而增强；源自疏水有机碳链的空间值阻对油膜强度的影响较小，而来自亲水基团的空间位阻则影响显著。AES分析结果表明，147N和294N负载下的四球磨痕上的氧化层的确是因摩擦而产生，不论是氧化铁层厚度比还是上面的有机物层的厚度比均为2：1。

Antifriction and Anti- wear Mechanism of Fatty Acid Hydroxylamine Soap in Water

It has been reported that fatty acid hydroxylamine soaps with special structures have better oiliness as well as better anti-wear performance. Their tribological performances in water were tested with four-ball machine and the wear tracks were characterized with Scanning Electron Microscopy (SEM) and Nover Electron Spectroscopy (AES). Tests showed that the antifriction-film strength formed by fatty acid hydroxylamine soaps increased with the increase of alkyl carbon atoms or with the increase of unsaturated bonds in alkyl chains. The space-resistant structures in the hydrophobic alkyl chains had few effects on antifriction-film strength, but had great effects if they were in hydrophilic segments. AES results showed that the formation of the oxide layers on the wear tracks under the loads of 147N and 294N was due to friction, and the thickness ratios of the ferric oxide layers and those of the upper organic layers under the two conditions are about 2:1. As a result, a new anti-wear mechanism was proposed basing on the experiment data.