Effective sugar-derived organic gelator for three different types of lubricant oils to improve tribological performance  

作　　者：Ruochong ZHANG Xuqing LIU Zhiguang GUO Meirong CAI Lei SHI 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Materials,University of Manchester,Oxford Road,Manchester M139PL,UK [4]Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Key Laboratory for the Green Preparation and Application of Functional Materials(Ministry of Education),Hubei University,Wuhan 430062,China

出　　处：《Friction》2020年第6期1025-1038,共14页摩擦（英文版）

基　　金：the financial support from the National Key R&D Program of China(No.2018YFB0703802);National Natural Science Foundation of China(Nos.51405477,21972153,and 51675512);Youth Innovation Promotion Association of CAS(No.2018454);the Gansu province science and technology plan(No.18ZD2W A011)。

摘　　要：In this study,the gelling ability and lubrication performance of N-octadecyl-D-gluconamides(NOG)in liquid paraffin(LP),pentaerythritol oleate(PE-OA),and polyethylene glycol(PEG)oils were systemically investigated.The NOG,which could gelate the investigated oils,was successfully synthesized by a one-step method.The prepared gel lubricants were completely thermoreversible and exhibited improved thermal stability,according to the thermogravimetry analysis(TGA)reports.Rheological tests confirmed that the NOG gelator could effectively regulate the rheological behavior of the base oils.Tribological evaluation suggested that NOG,as an additive in the three types of base oils,could remarkably reduce the friction and wear in steel contacts.A plausible mechanism for the improved performances was proposed based on the mechanical strength of the gels and the formation of the boundary-lubricating film on the worn surface.The results indicated that NOG is a potential gelator for preparing gel lubricants with excellent tribological properties and environment-friendly characteristics.

关 键 词：gel lubricant supermolecular assembly rheological property tribological performance lubricating mechanism 

分 类 号：TE624.8[石油与天然气工程—油气加工工程]