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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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钛金属薄膜上两种短链自组装分子膜的制备与摩擦特性
Keywords: 有机高分子材料,材料表面与界面,摩擦,自组装单分子膜,钛金属薄膜
Abstract:
？采用自组装技术在钛金属薄膜上制备了两种分子链长相同、官能团不同的自组装分子膜,并对其进行了不同时间的紫外照射.对钛金属薄膜和自组装分子膜进行了表征和摩擦特性测试,研究了紫外照射、官能团、滑动速度和载荷对自组装分子膜摩擦特性的影响.结果表明:通过紫外照射钛金属薄膜表面羟基化、自组装分子水解及自组装分子缩合可在钛金属薄膜上制备结构致密的自组装分子膜.制备的两种短链自组装分子膜可降低钛金属薄膜的摩擦特性,aps自组装分子膜的摩擦特性优于mps自组装分子膜的摩擦特性.紫外照射5min的自组装分子膜表面吸附的有机杂质被蒸发掉,对针尖的黏着力减小,从而导致针尖的变形减小,摩擦力最低.而紫外照射15min的自组装分子膜致密的网状结构被破坏,减弱了自组装分子膜的润滑效应.两种自组装分子膜的摩擦力随着滑动速度的增加略呈上升趋势,随着载荷的增加略呈下降趋势,但是变化不大.
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