| DPPC LB膜的摩擦学行为研究 |
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| 引用本文： | 叶滨,张晓峰,戴树玺,杜祖亮,张平余.DPPC LB膜的摩擦学行为研究[J].润滑与密封,2006(7):18-19,23. |
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| 作者姓名： | 叶滨 张晓峰 戴树玺 杜祖亮 张平余 |
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| 作者单位： | 河南大学特种功能材料重点实验室 河南开封475001 |
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| 摘 要： | 通过LB技术,以镉离子水溶液为亚相在单晶硅表面制备DPPC不同层数的LB膜,并通过AFM、UMT-2对其表面形貌及摩擦学行为进行考察。摩擦学行为研究发现,DPPC LB膜表现出比花生酸(AA)LB膜更为优异的摩擦学性能。同时,DPPC LB膜的摩擦学性能存在最佳层数。分析认为,DPPC LB膜优异的摩擦学性能与DPPC分子有2个亲水极性基团有关,它可使DPPC分子与亲水基底结合更为牢固,而亚相中金属离子的加入使成膜性能有效提高。
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| 关 键 词： | 二棕榈酸磷脂酰胆碱(DPPC) Langmuir-Blodget膜 磨损 摩擦学行为 |
| 文章编号： | 0254-0150（2006）7-018-2 |
| 收稿时间： | 2006-04-20 |
| 修稿时间： | 2006年4月20日 |
The Tribological Behaviors of LB Films of DPPC |
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| Ye Bin Zhang Xiaofeng Dai Shuxi Du Zuliang Zhang Pingyu.The Tribological Behaviors of LB Films of DPPC[J].Lubrication Engineering,2006(7):18-19,23. |
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| Authors: | Ye Bin Zhang Xiaofeng Dai Shuxi Du Zuliang Zhang Pingyu |
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| Abstract: | The Langmuir-Blodget LB films of dipalmitoylphosphatidylcholine(DPPC) on a solution of cadmium chloride were prepared on a silicon substrate.Friction of different layers LB films on silicon surfaces was measured with atomic force microscopy(AFM),universal micro-tribometer(UMT) and scanning electron microscope(SEM).The DPPC LB film has lower friction as compared to the unlubricated silicon surfaces and registers much higher antiwear life and load-carrying capacity than the arachic acid(AA) LB films.This attributes to the DPPC molecule has one more hydrophilic polar end,so the DPPC monolayer films bind more firmly to the substrate than that of AA.Meanwhile,adding metal ions to the subphase can improve the quality of LB film. |
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| Keywords: | dipalmitoylphosphatidylcholine(DPPC) Langmuir-Blodget film wear tribological behavior |
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