The emulsifying and tribological properties of modified graphene oxide in oil-in-water emulsion
The emulsifying and tribological properties of modified graphene oxide in oil-in-water emulsion
复制标题
改性氧化石墨烯在水包油乳液中的乳化和摩擦学性能
DOI：
10.1016/j.triboint.2016.10.024
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发表时间：
2017-01-01
影响因子：
6.2
通讯作者：
van der Heide, Emile
中科院分区：
文献类型：
--
作者：
Wu, Yinglei;Zeng, Xiangqiong;van der Heide, Emile
采用十四烷基三甲基溴化铵（TTAB）对氧化石墨烯（GO）进行不对称化学改性，得到改性氧化石墨烯（MGO）。该MGO用作水包油乳液中的乳化剂和添加剂。乳化实验表明，MGO大大提高了基础乳液的稳定性，减小了基础乳液的液滴尺寸。摩擦学试验结果表明，在MgO-乳状液边界润滑条件下，钢球的摩擦系数和磨损率较基础乳状液润滑分别降低了18%和48%左右。MGO乳液的摩擦学机理主要是在金属表面具有较强的成膜能力，其小液滴具有良好的润滑性，在接触表面形成吸附膜、转移膜和摩擦膜。
Graphene oxide (GO) was asymmetric chemically modified with myristyltrimethylammonium bromide (TTAB) to get modified graphene oxide (MGO). This MGO was used as an emulsifier and additive in oil-in-water emulsion. The emulsifying tests showed MGO greatly improved the stability of base emulsion and decreased its droplets size. Tribological test results showed that under the boundary lubrication condition with MGO-emulsion, the friction coefficient (COF) and the wear rate of the steel ball were decreased by about 18% and 48% respectively, comparing with base emulsion lubrication. The tribological mechanism of MGO-emulsion could be explained by the strong film-forming ability on the metal surface; the good lubricity of its small droplets; the formed adsorption film, transfer film and tribofilm between the contact surfaces.