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咪唑螯合硼离子液体的合成、表征及摩擦学性能
Authors
刘丹
刘升高
+5 more
商旺吉
孙俪文
张云潇
童丁毅
蔡涛
Publication date
1 January 2017
Publisher
Abstract
以一类环境友好的螯合硼离子液体为研究对象,合成了4种具有不同烷基直链阳离子中心的螯合硼离子液体C_nMImBScB(n=2,4,6,8);通过核磁共振波谱(NMR)、电耦合等离子体发射光谱(ICP-OES)、热重分析(TGA)和差示扫描量热分析(DSC)等方法对4种螯合硼离子液体进行了结构分析、硼含量测定和热稳定性分析.以聚乙二醇200(PEG200)作为基础油样品,C_nMImBScB(n=2,4,6,8)作为添加剂,采用四球摩擦磨损试验机、扫描电子显微镜(SEM)和能量色散X射线光谱(EDX)分别对油样的减摩抗磨性能、磨斑形貌和磨斑表面元素分布进行了分析和表征.结果表明,C_nMImBScB(n=2,4,6,8)可作为在较宽温度范围内使用的润滑油添加剂,离子液体的低浓度(质量分数1%~2%)添加使PEG200的摩擦性能得到大幅度提高,摩擦系数最大降低58.46%,磨斑直径最大降低20.5%;硼元素沉积到表面参与润滑膜的成膜,磨斑表面碳元素含量的增加也有助于摩擦性能的提高
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Last time updated on 22/01/2018