Nano-mechanics of Carbon Nanotube-Polymer Interfaces

碳纳米管-聚合物界面的纳米力学A·哈克，宾夕法尼亚州立大学摘要：这项研究的目标是用纳米线和纳米管作为增强剂，对纳米尺度界面的变形和破坏进行实验研究和建模。为了满足这些目标，将制造纳米级的“拉出”样品和高分辨率的微电子机械(MEMS)力和位移传感器。单个纳米线或纳米管的拔出实验将在扫描电子显微镜(SEM)内进行，放大倍数高达100,000倍，同时测量界面力和位移。在探索表面功能化的影响以及考虑粘着和摩擦的影响后，纳米尺度界面上的同时定性和定量信息将被用来模拟承载、变形和破坏机制，这些都是已知在纳米尺度上占主导地位的因素。对纳米界面力学的基础认识的进展将有助于开发具有新性能的纳米复合材料。该项目将通过将新兴和多学科知识与各级教育相结合，同时促进多样性，从而对社会产生影响。参与该项目的研究生将接受力学、显微镜、微机械和纳米技术等交叉领域的培训。本科生和少数民族学生将通过与宾夕法尼亚州立大学多元文化工程项目的持续合作参与这项研究。该项目有一个强大的外展部分，即K-12的显微镜，当地的小学、初中和高中的学生将在教室里远程操作扫描电子显微镜来观察微米/纳米尺度的标本。将利用这些教学材料和远程电子显微镜会议开发一个网站。

Nano-mechanics of Carbon Nanotube-Polymer InterfacesM. A. Haque, the Pennsylvania State University Abstract: The objectives of this research are to experimentally study and model deformation and failure of nanoscale interfaces using nanowires and nanotubes as reinforcing agents. To meet these objectives, nanoscale 'pull-out' specimens and high resolution micro-electro-mechanical (MEMS) force and displacement sensors will be fabricated. Single nanowire or nanotube pull-out experiments will be performed in-situ inside the Scanning Electron Microscope (SEM) at up to 100,000x magnification while interfacial forces and displacements are measured. The simultaneously qualitative and quantitative information on the nanoscale interfaces will be used to model the load bearing, deformation and failure mechanics after exploring the effects of surface functionalization and accounting for adhesion and friction, which are known to be dominant at the nanoscale. The advances in the fundamental understanding in the mechanics of nanoscale interfaces will help develop nano-composites with novel properties. The project will impact the society by integrating emerging and multi-disciplinary knowledge with education at all levels while promoting diversity. Graduate students involved with the project will be trained in cross-cutting areas of mechanics, microscopy, MEMS and nano-technology. Undergraduate and minority group students will be involved with the research through an ongoing collaboration with the Penn State Multicultural Engineering Program. The project has a strong outreach component, 'Microscopy for K-12' where local elementary, middle and high school students will remote operate a scanning electron microscope in the class rooms to observe micro/nanoscale specimens. A website will be developed with these instructional materials and the remote electron microscopy sessions.