Surface modification of carbon fabrics (CFs) by nitric acid and multiwall carbon nanotube (MWCNT) incorporation into the resin matrix were simultaneously applied for CFs/resin composites to improve their tribological properties. The results show that surface roughness (Ra) of CFs increases from 8.20 to 15.10 nm after nitric acid treatment due to the remove of sizing agent on CFs surface. Surface hardness of the composites with 0.1 wt% MWCNT (CFR‐H‐0.1%T) is enhanced from 0.745 to 1.216 GPa compared with that of untreated CFs/phenolic resin composites (CFR), which is attributed to the toughening effect of MWCNT in resin matrix. The friction coefficient increases from 0.10 for CFR to 0.16 for CFR‐H‐0.1%T, while the wear rate significantly decreases from 5.75 × 10⁻¹⁴ m³ (N m)⁻¹ to 2.05 × 10⁻¹⁴ m³ (N m)⁻¹. The improvement of friction and wear properties is ascribed to the synergistic effect of the oxidation etching of nitric acid and the strengthening and toughening of MWCNT.

中文翻译：

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碳纤维织物表面改性和多壁碳纳米管掺入的协同效应对改善碳纤维织物/树脂复合材料的摩擦学性能

通过硝酸对碳纤维织物（CFs）的表面改性和将多壁碳纳米管（MWCNT）掺入树脂基质中，可同时用于CFs /树脂复合材料，以改善其摩擦学性能。结果表明，由于去除了CFs表面的上浆剂，硝酸处理后CFs的表面粗糙度（Ra）从8.20 nm增加到15.10 nm。与未处理的CFs /酚醛树脂复合材料（CFR）相比，含0.1 wt％MWCNT（CFR-H-0.1％T）的复合材料的表面硬度从0.745 GPa提高到1.216 GPa，这归因于MWCNT在树脂基体。摩擦系数从CFR的0.10增加到CFR-H-0.1％T的0.16，而磨损率从5.75×10 ^-14 m ³（N m）显着降低^-1至2.05×10 ^-14 m ³（N m）^-1。摩擦磨损性能的提高归因于硝酸氧化蚀刻与MWCNT的增强和增韧的协同作用。