Creation of functional tribo-surfaces using cross-interactions between molecularly thin film and surface nano-structure

利用分子薄膜和表面纳米结构之间的交叉相互作用创建功能摩擦表面

基本信息

批准号：
16360079
负责人：
MITSUYA Yasunaga
金额：
$ 8.58万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

We optimize the conditions for fabricating the chemical texture and clarified the mechanism of the formation of the chemical texture. Also, we constituted a new tester for measuring the friction force on lubricant molecule-layered surface. In addition, Using the molecular dynamics simulation, we quantified surface morphology and clarified the mechanism that the surface morphology changes depending on the layering of the polar lubricant molecules. We summarize the results as follows :1) Through the observation of weting/dewetting, measurements of surface energy and spreading profiles, the relationships between the number of layers, surface energy distribution and surface stability were clarified based on the unified understandings.2) We succeeded to form nano-size concavo-convex lubricant texture by applying ultra-violet rays on a lubricant film through a mask pattern. We firstly found that such texture was formed by molecules flow from non-UV irradiated zone to UV irradiated zone, which enable us to form arbitrary shape of texture. We confirmed that texturing is possible not only polar lubricants but also non-polar lubricants.3) Using a pin-on-disk type sliding tester, depletion and replenishment characteristics of chemical textured surfaces are compared between different PFPE lubricants with and without polar end groups. We confirmed that the texturing treatment is possible not only polar lubricants but also non-polar lubricants.4) Using a coarse-grained molecular dynamics simulation based on the bead-spring polymer model, we reproduced the film distribution of molecularly thin lubricant films with polar end groups on a disk surface. We found that the film surface morphology changed periodically with the aggregation formed by inducing the polar end groups to attain more stable polar interactions.

我们优化了化学织构的制备条件，阐明了化学织构的形成机理。此外，我们还构建了一种新的测试仪，用于测量润滑剂分子层表面上的摩擦力。此外，利用分子动力学模拟，我们量化了表面形态，并阐明了表面形态根据极性润滑剂分子的分层而变化的机制。我们将结果总结如下：1）通过润湿/反润湿的观察、表面能和铺展剖面的测量，在统一的理解的基础上阐明了层数、表面能分布和表面稳定性之间的关系。2）我们通过掩模图案对润滑膜照射紫外线，成功形成纳米尺寸的凹凸润滑纹理。我们首次发现这种纹理是由分子从非紫外线照射区流向紫外线照射区形成的，这使得我们能够形成任意形状的纹理。我们证实，不仅极性润滑剂而且非极性润滑剂都可以进行纹理化。3) 使用销盘式滑动测试仪，比较了具有和不具有极性端基的不同 PFPE 润滑剂之间的化学纹理表面的消耗和补充特性。我们证实，织构处理不仅可以用于极性润滑剂，还可以用于非极性润滑剂。4）使用基于珠弹簧聚合物模型的粗粒分子动力学模拟，我们再现了具有极性的分子薄润滑剂膜的薄膜分布。磁盘表面上的端基。我们发现薄膜表面形貌随着极性端基诱导形成的聚集而周期性变化，以获得更稳定的极性相互作用。