摘要
以三种具有典型分子结构的单胺为主要原料,采用同一种方法制备了三种相同稠化剂含量的聚脲润滑脂.利用扫描电镜(SEM)表征了三种聚脲润滑脂中稠化剂的微观结构.结果表明:十八胺聚脲润滑脂的稠化剂形貌为缠绕的纤维结构,环己胺和苯胺聚脲润滑脂的稠化剂形貌为堆积的棒状.同时,研究探讨了三种聚脲润滑脂在不同温度下的触变性能、储能模量、损耗模量和表观黏度的变化规律,并解释了其流变学性能与稠化剂的微观形貌和分子间作用力的关联性.本研究结果将为聚脲润滑脂的设计开发提供良好的理论指导,并促进聚脲润滑脂性能研究与应用的发展.
Three polyurea greases with the same mass fraction of thickener were prepared by the same method using three kinds of monoamines with typical molecular structure.The microstructure of thickeners in three polyurea greases was characterized by scanning electron microscopy.The results showed that the microstructure of thickener in octadecylamine polyurea grease was entangled fiber structure,and which in cyclohexylamine and aniline polyurea grease was stack spindle.Moreover,the thixotropic properties,storage modulus,loss modulus,and apparent viscosity of three polyurea greases were investigated at different temperatures.The relationship between rheological properties of polyurea greases and the micromorphology and intermolecular forces of the thickener was explained.This study provided a good theoretical guidance for the design and development of polyurea greases,and promote the research and application of polyurea greases.
作者
徐状
任佳
赵改青
王卓群
蔡浩鹏
王晓波
XU Zhuang;REN Jia;ZHAO Gaiqing;WANG Zhuoqun;CAI Haopeng;WANG Xiaobo(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Qingdao Center of Resource Chemistry and New Materials,Shandong Qingdao 266100,China;Qingdao lubemater Lubricating Material Technology Co,Ltd,Shandong Qingdao 266100,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2020年第3期378-384,共7页
Tribology
基金
国家重点研发计划(2018YFB2000601)资助.
关键词
聚脲润滑脂
流变学性能
触变性能
模量
表观黏度
polyurea grease
rheological properties
thixotropic properties
modulus
apparent viscosity
