Boundary Lubrication and Surface Dynamics

边界润滑和表面动力学

基本信息

批准号：
0510239
负责人：
Lynden Archer
金额：
$ 25万
依托单位：
Cornell University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-08-01 至 2008-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0510239&HistoricalAwards=false
关键词：
Boundary Lubrication Surface Dynamics

项目摘要

Abstract 0510239There is a longstanding need for self-lubricating materials for mechanical systems such as gyroscopes, motors, and unmanned space vehicles, in which maintenance-free operation is required over long periods of time. An even greater need exists for these materials for micro- and nano-electro-mechanical systems (MEMS and NEMS) assemblies earmarked for myriad applications in nanotechnology, including actuators for microwave switches and robotics and "intelligent" sensing and drug delivery equipment. In these applications, the miniature scale of the devices increases their surface-to-volume ratio, enhancing the likelihood that premature mechanical failure results from accidental contact of moving surfaces. To design an effective self-lubricated material, it is necessary that lubricant molecules possess high surface mobility, so that the dynamic friction coefficient of the surface is low. This requirement must be balanced against the known tendency of adsorbing substrates to slow down motion of molecules and thereby reduce their effectiveness as lubricants. The research proposed uses a combination of experiment and theory to improve current understanding of molecular mobility and lubrication properties of surface coatings possessing controlled levels of molecular disorder. The investigators propose to exploit this understanding to develop novel lubricant coatings suitable for micro and nano-sized mechanical systems.

摘要0510239，长期以来，需要用于陀螺仪，电动机和无人太空车辆等机械系统的自润滑材料，其中长时间需要进行无维护操作。对于这些材料的微型机电系统（MEMS和NEMS）组件，这些材料的需求更大，这些材料专用于纳米技术，包括用于微波开关和机器人的执行器，以及“智能”感应和药物输送设备。在这些应用中，设备的微型尺度增加了其表面与体积比率，从而增加了由移动表面意外接触而导致的过早机械故障的可能性。要设计有效的自润滑材料，有必要具有较高的表面迁移率，因此表面的动态摩擦系数很低。该要求必须与已知的吸附底物减慢分子运动的已知趋势平衡，从而降低其作为润滑剂的有效性。该研究提出的结合使用了实验和理论，以提高对具有控制水平分子疾病水平的表面涂层的分子迁移率和润滑特性的当前理解。研究人员建议利用这种理解来开发适合微型和纳米大小机械系统的新型润滑涂层。