Effect of maleic-anhydride-grafted-polypropylene (PP-g-MA) and graphene oxide (GO) addition on the tribological properties of polypropylene (PP) nanocomposites were investigated in this study. Graphene oxides with different levels (0.05 and 0.15 wt%) were used as reinforcing filler for PP nanocomposites. Maleic-anhydride-grafted-polypropylene (3 wt%) was added as a compatibilizer agent to increase the interaction between the GO and PP matrix. GO-filled PP nanocomposites with and without PP-g-MA were produced by a twin-screw extruder followed by injection moulding. Wear tests were carried out under dry sliding conditions against AISI 1040 steel disc using a pin-on-disc device at 0.4–1.6 $$\hbox { m s}^{-1}$$ m s - 1 sliding speed and 10–40 N loads. The tribological test results showed that the coefficient of friction and wear rate of PP nanocomposites increased with applied loads and sliding speeds. The coefficient of friction decreased by 8.2, 14.2, 37.3 and 74.7% under $$1.2\hbox { m s}^{-1}$$ 1.2 m s - 1 sliding speed and 40 N load with the addition of PP-g-MA and GO to the PP nanocomposites. The wear rate of PP and its nanocomposites was $$10^{-13}\hbox { m}^{2}\hbox { N}^{-1}$$ 10 - 13 m 2 N - 1 . The minimum wear rate was obtained for 0.15 wt% GO and 3 wt% PP-g-MA-filled PP nanocomposites with a value of $$5.7537\hbox {E}^{-14}\hbox { m}^{2}\hbox { N}^{-1}$$ 5.7537 E - 14 m 2 N - 1 at $$0.4\hbox {m s}^{-1}$$ 0.4 m s - 1 sliding speed and 10 N load in this study.

中文翻译：

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相容剂和氧化石墨烯填充聚丙烯纳米复合材料的摩擦学性能

本研究研究了马来酸酐接枝聚丙烯 (PP-g-MA) 和氧化石墨烯 (GO) 添加对聚丙烯 (PP) 纳米复合材料摩擦学性能的影响。不同含量（0.05 和 0.15 wt%）的氧化石墨烯被用作 PP 纳米复合材料的增强填料。添加马来酸酐接枝聚丙烯 (3 wt%) 作为增容剂以增加 GO 和 PP 基质之间的相互作用。含有和不含 PP-g-MA 的 GO 填充 PP 纳米复合材料通过双螺杆挤出机随后注塑成型。磨损测试是在干滑动条件下对 AISI 1040 钢盘使用销钉盘装置在 0.4-1.6 $$\hbox { ms}^{-1}$$ ms - 1 滑动速度和 10-40 N 下进行的负载。摩擦学测试结果表明，PP纳米复合材料的摩擦系数和磨损率随着施加载荷和滑动速度的增加而增加。在$$1.2\hbox { ms}^{-1}$$ 1.2 ms - 1滑动速度和40 N载荷下，加入PP-g-MA和GO，摩擦系数降低了8.2%、14.2%、37.3%和74.7% PP纳米复合材料。PP及其纳米复合材料的磨损率为$$10^{-13}\hbox { m}^{2}\hbox { N}^{-1}$$ 10 - 13 m 2 N - 1 。获得了 0.15 wt% GO 和 3 wt% PP-g-MA 填充的 PP 纳米复合材料的最小磨损率，价值为 $5.7537\hbox {E}^{-14}\hbox { m}^{2}\ hbox { N}^{-1}$$ 5.7537 E - 14 m 2 N - 1 at $$0.4\hbox {ms}^{-1}$$ 0.4 ms - 1 滑动速度和 10 N 负载在本研究中。7% 低于 $$1.2\hbox { ms}^{-1}$$ 1.2 ms - 1 滑动速度和 40 N 负载，向 PP 纳米复合材料中添加 PP-g-MA 和 GO。PP 及其纳米复合材料的磨损率为 $$10^{-13}\hbox { m}^{2}\hbox { N}^{-1}$$ 10 - 13 m 2 N - 1 。获得了 0.15 wt% GO 和 3 wt% PP-g-MA 填充的 PP 纳米复合材料的最小磨损率，价值为 $5.7537\hbox {E}^{-14}\hbox { m}^{2}\ hbox { N}^{-1}$$ 5.7537 E - 14 m 2 N - 1 在 $$0.4\hbox {ms}^{-1}$$ 0.4 ms - 1 滑动速度和 10 N 负载在本研究中。7% 低于 $$1.2\hbox { ms}^{-1}$$ 1.2 ms - 1 滑动速度和 40 N 负载，向 PP 纳米复合材料中添加 PP-g-MA 和 GO。PP及其纳米复合材料的磨损率为$$10^{-13}\hbox { m}^{2}\hbox { N}^{-1}$$ 10 - 13 m 2 N - 1 。获得了 0.15 wt% GO 和 3 wt% PP-g-MA 填充的 PP 纳米复合材料的最小磨损率，价值为 $5.7537\hbox {E}^{-14}\hbox { m}^{2}\ hbox { N}^{-1}$$ 5.7537 E - 14 m 2 N - 1 at $$0.4\hbox {ms}^{-1}$$ 0.4 ms - 1 滑动速度和 10 N 负载在本研究中。