插层改性膨润土对聚合物基摩擦材料摩擦性能的影响  

Effect of Intercalated Modified Bentonite on Tribology Properties of Polymer Matrix Friction Materials

作　　者：马原野 王占红[1] 侯贵华[2] 蒋穹[1] 杨子润[1] 黎水平[1] Ma Yuanye;Wang Zhanhong;Hou Guihua;Jiang Qiong;Yang Zirun;Li Shuiping(School of Materials Engineering, Yancheng Institute of Technology, Yancheng 224051, China;Key Laboratory of New Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China)

机构地区：[1]盐城工学院材料工程学院,江苏盐城224051 [2]盐城工学院,江苏省新型环保重点实验室,江苏盐城224051

出　　处：《工程塑料应用》2018年第5期6-11,共6页Engineering Plastics Application

基　　金：：国家自然科学基金项目(51603179),江苏高校品牌专业建设工程项目(PPZY2015A025),2017校企合作项目(10424)

摘　　要：采用热压成型工艺制备了插层改性膨润土掺杂的聚合物基摩擦材料,通过对比改性前后的膨润土掺杂的数据结果,进而探索插层改性膨润土的摩擦材料磨损表面的形态、物理力学性能、摩擦磨损性能的变化规律。结果表明:插层改性之后,膨润土的形貌由不规则的颗粒状变成片层状结构,晶面间距比原来增大了0.089 22 nm,表明季铵盐十六烷基三甲基溴化铵已经成功地插层进入膨润土层间。与未改性的膨润土相比,季铵盐改性膨润土增强的摩擦材料磨损表面更为平整,这与表面生成的摩擦膜密切相关,其硬度从未改性膨润土掺杂摩擦材料的85~95降低到了80~90,冲击强度明显提高,摩擦系数较高,磨损率较低,尤其是当温度为350℃时,季铵盐改性膨润土掺杂的摩擦材料其摩擦系数从原来的0.15增加至0.23,而磨损率从原来的2.25×10^(–7) cm^3/(N·m)降低至0.97×10^(–7) cm^3/(N·m),综合性能变好。Polymer matrix friction materials filled with the intercalated modified bentonite were prepared by heat-press mold-ing method. Change rules of the morphology of worn surface,physical and mechanical properties, and friction and wear properties of the samples were investigated respectively by contrasting the data results of friction materials including the original and modified bentonite. The results show that the morphology of bentonite has changed from irregular granular to lamellar structure, and the inter-planar spacing increases by 0.089 22 nm after intercalation, which indicate that the etyltrimethylammonium bromide has been suc-cessfully intercalated into the interlamination of bentonite. The friction material including modified bentonite shows smoother wear surface than that of the friction material including the original bentonite, which is closely related with the friction films formed on the surface. The friction material doped by the modified bentonite shows higher hardness （85-95） than that of friction material doped by the original bentonite （80-90）. Moreover, the impact strength and friction coefficient increase obviously. The wear rate is low. Espe-cially, the friction coefficient increases from 0.15 to 0.23 at 350℃,while the wear rate decreases from 2.25 ×10^–7 cm3/（N·m） to 0.97×10^–7 cm3/（N·m） after doping the modified bentonite. Therefore, the comprehensive performance of the friction material is better.

关 键 词：插层改性 膨润土 聚合物基摩擦材料 摩擦 磨损 

分 类 号：TB332[一般工业技术—材料科学与工程]