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硬脂酸改性CuO-TiO2薄膜的摩擦学性能
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国家自然科学基金项目(51375249)


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    摘要:

    采用溶胶-凝胶技术在钢基底上制备CuO-TiO2薄膜,再用自组装技术在薄膜表面沉积硬脂酸分子获得有机-无机复合薄膜。利用接触角测量仪和X射线粉末衍射仪研究薄膜的润湿性和晶体结构,用球盘型微纳摩擦磨损试验机研究薄膜在干摩擦条件下与轴承钢球往复滑动的摩擦学性能。结果发现,CuO-TiO2薄膜经硬脂酸改性后得到的双层薄膜呈现高疏水状态,对水接触角达135°,具有优异的摩擦学性能,这主要是由于双层薄膜可充分利用CuO-TiO2薄膜自身的耐磨特性与脂肪酸薄膜的减摩特性以及两者之间可能存在的协同作用。

    Abstract:

    The thin films of CuO-TiO2 were prepared on steel substrates via a solgel method. The stearic acid was then deposited on the CuOTiO2 films to obtain an organicinorganic composite film. The contact angle measurements and Xray diffraction were used to investigate the films’ wetting behavior and crystalline structure of films, respectively. UMT3 friction and wear testing machine was used to studied the tribological performances of the films against the bearing steel ball under reciprocating sliding and dry friction. The stearic acid modified CuO-TiO2 composite film presents high hydrophobic state with a water contact angle of 135°. Due to the synergy effects of antiwear performance of CuO-TiO2 film and frictionreducing performance of stearic acid film, the composite film has good tribological performance.

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张明星,高建国,林海军,董志伟,万勇.硬脂酸改性CuO-TiO2薄膜的摩擦学性能[J].润滑与密封,2015,40(10):41-44.
.[J]. Lubrication Engineering,2015,40(10):41-44.

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  • 在线发布日期: 2016-01-08
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