液晶润滑ZrO_(2)/PI的超滑性能研究  

Superlubricity performance of ZrO_(2)/PI lubricated with liquid crystals

作　　者：严思雨 贺翼超 李蕾 熊浩 秦襄培[3] 吴莉 YAN Siyu;HE Yichao;LI Lei;XIONG Hao;QIN Xiangpei;WU Li(School of Chemical and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Analysis and Testing Center of Wuhan Institute of Technology,Wuhan 430205,China;School of Mechanical and Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430205 [2]武汉工程大学分析测试中心,湖北武汉430205 [3]武汉工程大学机电工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2024年第5期497-502,共6页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(52475188)。

摘　　要：研究了由液晶(LC)和聚酰亚胺(PI)组成的摩擦学系统的摩擦性能。该摩擦学系统用ZrO_(2)和PI(PMDA-ODA)薄膜作为摩擦副,液晶3PEP5(80%)-3UTPP2(20%),3PEP5(80%)-3UTPP4(20%)和3PEP5(80%)-4UTPP3(20%)作为润滑剂。在不同的转速和载荷下对该系统进行了摩擦试验,并对实验样品PI膜进行了表面分析测试,其中包括白光干涉测试和SERS。摩擦实验结果表明:液晶3PEP5(80%)-4UTPP3(20%)在5?N载荷和250?r/min转速下的平均摩擦系数最小。表面分析结果表明:PI分子主链与侧链的部分基团在摩擦后的取向与PI表面平行,导致超滑现象的产生。在摩擦学系统中以ZrO_(2)陶瓷作为摩擦副是一种新的尝试,这有助于推动ZrO_(2)摩擦系统的研究。This paper focuses on the friction performance of a tribological system composed of liquid crystal(LC)and polyimide(PI).The tribological system mentioned uses ZrO_(2)and PI(PMDA-ODA)films as the friction pair,with liquid crystals 3PEP5(80%)-3UTPP2(20%),3PEP5(80%)-3UTPP4(20%)and 3PEP5(80%)-4UTPP3(20%)used as lubricants.We conducted friction tests on the system under different rotational speeds and loads,and performed surface analysis tests on the PI film experimental sample,including white light interference testing and SERS.The friction test results show that the average friction coefficient of liquid crystal 3PEP5(80%)-4UTPP3(20%)is the smallest under a load of 5 N and a rotational speed of 250 r/min,and those of surface analysis tests show that some groups in the main chain and side chain of the PI molecule are oriented parallel to the PI surface after rubbing,resulting in the occurrence of superlubricity.Using ZrO_(2)ceramics as the friction pair in the tribological system is a new attempt,which will contribute to the future research of ZrO_(2)friction systems.

关 键 词：超滑 液晶 向列相 聚酰亚胺 取向 摩擦 

分 类 号：TH117.2[机械工程—机械设计及理论]