Abstract Background The friction and wear of water-lubricated bearings has always been an engineering problem that we need to solve urgently. Object To investigate the influence of SiO2 particle size and dispersion on the friction and wear properties of nitrile rubber. Method The friction and wear performance of rubber compounds (SiO2 (nano)/NBR, SiO2 (micr)/NBR and SiO2 (TESP)/NBR) was tested by American Rtec multifunctional friction and wear test machine under the conditions of water lubrication and constant temperature. Results The results showed that the particle size of SiO2 has a great impact on its dispersion in nitrile rubber, and the surface modification of SiO2 can significantly improve its dispersion. SiO2 (TESPT)/NBR showed a good friction coefficient under low-speed and high-load conditions. The wear of SiO2 (nano)/NBR and SiO2 (micr)/NBR, which was mainly the fatigue wear, was relatively serious. In contrast, the modified SiO2 had a smaller particle size, better dispersion and stronger interfacial bonding with the nitrile rubber matrix. This significantly reduced the wear of SiO2 (TESPT)/NBR, which was mainly the abrasive wear, and improved its wear resistance.

中文翻译：

---

SiO2粒径及分散度对丁腈橡胶摩擦学性能影响的研究

摘要 背景水润滑轴承的摩擦磨损一直是我们急需解决的工程问题。目的研究SiO2粒径和分散度对丁腈橡胶摩擦磨损性能的影响。方法采用美国Rtec多功能摩擦磨损试验机，在水润滑和恒定条件下测试胶料（SiO2（纳米）/NBR、SiO2（微米）/NBR和SiO2（TESP）/NBR）的摩擦磨损性能。温度。结果 结果表明，SiO2 的粒径对其在丁腈橡胶中的分散性影响很大，SiO2 的表面改性可以显着提高其分散性。SiO2 (TESPT)/NBR 在低速和高负荷条件下表现出良好的摩擦系数。SiO2(nano)/NBR和SiO2(micro)/NBR的磨损以疲劳磨损为主，磨损比较严重。相比之下，改性 SiO2 具有更小的粒径、更好的分散性和更强的与丁腈橡胶基体的界面结合。这显着降低了SiO2（TESPT）/NBR的磨损，主要是磨粒磨损，并提高了其耐磨性。