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为了改善铸型(MC)尼龙的摩擦学性能,提出了一种硅灰石表面接枝MC尼龙的表面处理方法,并制备了表面接枝MC尼龙的硅灰石填充MC尼龙复合材料,测试了其力学和摩擦学性能.结果表明:表面接枝MC尼龙硅灰石填充MC尼龙与尼龙基体具有良好的结合界面,复合材料的硬度和拉伸强度分别提高了31%和26%,复合材料的拉伸断裂伸长率下降了68%.干摩擦条件下,MC尼龙复合材料的摩擦因数随硅灰石含量的增加而升高,5%质量分数硅灰石填充MC尼龙复合材料的摩擦因数达到0.5;水润滑条件下,硅灰石对MC尼龙摩擦因数影响较小,3种材料的摩擦因数均为0.18;2种试验条件下,填充硅灰石复合材料的磨损率显著降低,耐磨性能较纯MC尼龙分别提高了5倍和2倍.MC尼龙复合材料的磨损主要为磨粒和黏着磨损.
In order to improve the tribological properties of MC nylon, a surface treatment method of MC nylon grafted on wollastonite surface was proposed. Wollastonite MC nylon composites with MC grafted on the surface were prepared and tested. Its mechanical and tribological properties.The results show that the surface grafted MC nylon wollastonite has a good bonding interface between MC nylon and nylon matrix, the hardness and tensile strength of the composites are respectively increased by 31% and 26% The tensile elongation at break decreased by 68%, the friction coefficient of MC nylon composite increased with the increase of Wollastonite content, the friction coefficient of 5% Wollastonite-filled MC nylon composite reached 0.5; Under the conditions of water lubrication, the wollastonite has little effect on the friction coefficient of MC nylon, the friction coefficient of the three materials are 0.18; under the two conditions, the wear rate of the wollastonite composites is significantly reduced, the wear resistance Compared with pure MC nylon, it increased by 5 times and 2 times respectively.The wear of MC nylon composite was abrasive and adhesive wear.