Abstract Powdered nitrile rubber@ silicon dioxide (PNBR@SiO2) capsules were successfully prepared based on the sol-gel method and introduced into phenolic resin composites (PRC) as wear modifiers. Results showed that PNBR@SiO2 capsule modified PRC had slightly lower friction coefficient under diverse braking pressures and their wear rate at the braking pressure of 0.50 MPa was reduced by 97.3% than that of unmodified PRC owing to their excellent heat resistance, thus reducing adhesive wear. In contrast to PNBR modified PRC, the recession temperature on the friction coefficient of PNBR@SiO2 capsule modified PRC increased from 250 °C to 300 °C and the wear rate at 350 °C decreased by 21.6%, which was attributed to the reduction of abrasive wear and fatigue wear.

中文翻译：

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粉状丁腈橡胶@二氧化硅胶囊作为酚醛树脂复合材料干摩擦磨损改性剂

摘要 基于溶胶-凝胶法成功制备了粉末丁腈橡胶@二氧化硅（PNBR@SiO2）胶囊，并将其作为耐磨改性剂引入酚醛树脂复合材料（PRC）中。结果表明，PNBR@SiO2胶囊改性PRC在不同制动压力下的摩擦系数略低，由于其优异的耐热性，其在0.50 MPa制动压力下的磨损率比未改性PRC降低了97.3%，从而减少了粘附磨损. 与PNBR改性PRC相比，PNBR@SiO2胶囊改性PRC的摩擦系数衰退温度从250℃升高到300℃，350℃磨损率降低21.6%，这是由于磨粒磨损和疲劳磨损。