The study of hexanoate-based protic ionic liquids used as lubricants in steel-steel contact
作者:Hong Guo、Thomas W. Smith、Patricia Iglesias
DOI:10.1016/j.molliq.2019.112208
日期:2020.2
attributed to hydrogen bonding. The three protic ionic liquids, especially 2-hydroxyethylammonium 2-ethylhexanocate and 2-hydroxymethylammonium 2-ethylhexanocate, outperformed other studied lubricants showing lower and stable friction coefficient. The improved lubrication performance is attributed to the strong physical adsorption of the ionic liquids on the steel-steel surfaces to form ordered lubrication
三个新的基于己酸质子的离子液体具有不同的铵阳离子(2-羟乙基铵,2-乙基己-2- hydroxymethylammonium 2- ethylhexancate和2- hydroxydimethylammonium 2-乙基己酸)的合成,其特征在于,和研究作为整齐钢-钢滑动接触模式下的润滑剂。具有2-羟乙基铵阳离子的离子液体表现出最高的密度,粘度,接触角和热稳定性值。2-羟乙基铵盐中粘度和接触角的高值可归因于氢键。三种质子离子液体,特别是2-乙基己酸2-羟乙基铵和2-乙基己酸2-羟甲基铵,表现出较低且稳定的摩擦系数,优于其他研究的润滑剂。改善的润滑性能归因于离子液体在钢表面上的强物理吸附,从而由于静电相互作用而形成有序的润滑层。此外,在磨损的钢表面上形成富碳和富氧层有助于减少摩擦。