对甲苯酚-AOT双组份超分子凝胶的制备及摩擦学性能研究

本文中报道了一类制备方法简单且成本较低的双组份超分子凝胶，其具有良好的减摩抗磨性能. 双组份凝胶的两种凝胶因子选择的是对甲苯酚(p-cresol)和琥珀酸二(2-乙基己基)酯磺酸钠(AOT)，它们在基础油中共同作用形成凝胶，将该双组份凝胶因子简称为p-cresol-AOT. 该双组份凝胶因子具有很强的自组装能力，可以凝胶化多种润滑油，包括矿物润滑油、合成润滑油和全配方商品润滑油等. 本文中通过氢谱核磁共振、红外光谱和RS6000旋转流变仪对凝胶的自组装机理和流变学进行研究，结果显示凝胶因子通过分子间非共价键作用发生超分子自组装. 采用微动摩擦磨损试验机(SRV-IV)对超分子凝胶润滑剂进行摩擦学评价，结果显示，p-cresol-AOT在不同的基础润滑油中形成的凝胶均能提高该基础油的耐极压，减摩和抗磨性能. 该凝胶润滑剂之所以具备良好的润滑性能主要归结于凝胶因子起到了润滑添加剂的作用，在摩擦过程中形成有效的边界保护膜从而减少了摩擦副的直接接触，起到了良好的润滑保护作用.This paper reports a class of two-component supramolecular gels with simple preparation process and low cost, which exhibit excellent friction-reducing and anti-wear properties. The two gelators for the two-component gels are p-cresol and sodium bis(2-ethylhexyl) sulfosuccinate (AOT), which jointly form gels in base oils; this two-component gelator system is abbreviated as p-cresol-AOT. This two-component gelator possesses strong self-assembly ability, and can gelate various lubricants including mineral lubricants, synthetic lubricants and fully-formulated commercial lubricants. In this work, the self-assembly mechanism and rheological properties of the gels were investigated via 1H nuclear magnetic resonance (1H NMR), infrared spectroscopy (IR) and an RS6000 rotational rheometer. The results show that the gelators undergo supramolecular self-assembly through intermolecular non-covalent interactions. The tribological performance of the supramolecular gel lubricants was evaluated using an SRV-IV fretting friction and wear testing machine, and the results demonstrate that the gels formed by p-cresol-AOT in different base lubricants can all improve the extreme pressure resistance, friction-reducing and anti-wear performance of the corresponding base oils. The excellent lubricating performance of this gel lubricant is mainly attributed to the role of the gelator as a lubricating additive, which forms an effective boundary protective film during the friction process to reduce the direct contact between friction pairs and achieve good lubrication and protection effects.

搜集汇总

背景与挑战

背景概述

该数据集研究了对甲苯酚和AOT双组份超分子凝胶的制备及其摩擦学性能。凝胶因子能自组装凝胶化多种润滑油，通过非共价键作用形成超分子结构，实验表明凝胶润滑剂显著提升基础油的耐极压、减摩和抗磨性能，主要机制是凝胶因子在摩擦过程中形成边界保护膜以减少直接接触。