沙水润滑下纳米改性NBR材料的摩擦学性能

丁腈橡胶(NBR)是一种优异的水润滑减摩耐磨材料，但硬质颗粒的介入对其产生较大的材料损失. 利用硅烷偶联剂TESPT改性纳米SiO2颗粒，并填充至NBR基体，获得改性纳米SiO2/NBR标记为NBR-1. 改性后的纳米SiO2颗粒在NBR基体中均匀分散. 将纳米SiO2颗粒、微米SiO2颗粒填充至NBR基体标记为NBR-2、NBR-3作为对照组. 三种复合材料在武汉理工大学自制的SSB-100型摩擦磨损试验机上进行沙水润滑工况下的摩擦磨损试验. 结果表明：三种复合材料在沙水工况下摩擦系数均随载荷和转速的增加而下降. 在相同的载荷和转速条件下，NBR-1的摩擦性能最为优异. 对比三种材料的耐沙磨损性能，沙粒对NBR表面的磨损主要为犁沟磨损，NBR-2和NBR-3材料磨损量远远大于NBR-1，NBR-1材料更适用于含沙水区域.

Nitrile Butadiene Rubber (NBR) is an excellent water-lubricated friction-reducing and wear-resistant material, yet the incorporation of hard particles causes considerable material loss to it. Nanoscale SiO₂ particles were modified using the silane coupling agent TESPT, then filled into the NBR matrix to fabricate the modified nanosilica/NBR composite labeled as NBR-1. The modified nanoscale SiO₂ particles were uniformly dispersed within the NBR matrix. Composites filled with nanoscale SiO₂ particles alone and microscale SiO₂ particles alone were prepared as control groups, labeled as NBR-2 and NBR-3, respectively. Friction and wear tests of the three composites were conducted under sand-water lubrication conditions using a self-developed SSB-100 friction and wear tester manufactured by Wuhan University of Technology. The results show that the friction coefficients of all three composites decrease with increasing load and rotational speed under sand-water lubrication conditions. Under identical load and rotational speed conditions, NBR-1 exhibits the optimal friction-reducing performance. When comparing the sand wear resistance of the three materials, it is revealed that the wear on NBR surfaces induced by sand particles is mainly plowing abrasive wear. The wear losses of NBR-2 and NBR-3 are significantly greater than that of NBR-1, demonstrating that NBR-1 is more suitable for sandy water environments.

搜集汇总

背景与挑战

背景概述

该数据集研究了纳米改性丁腈橡胶材料在沙水润滑条件下的摩擦学性能，通过对比实验发现纳米SiO2改性的NBR-1材料表现出最优异的摩擦性能和耐沙磨损性能，适用于含沙水区域的应用。