Nanomechanical Characterizations of Interfaces in Carbon Nanotube Reinforced Nanocomposites

碳纳米管增强纳米复合材料界面的纳米力学表征

• 批准号: 0800896
• 负责人: Jun Lou
• 金额: $ 31.05万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2013-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800896&HistoricalAwards=false
• 关键词: Nanomechanical; Characterizations; Interfaces; Carbon; Nanotube

AbstractThe research objective of this award is to take a systematic and integral approach to study interfaces in SWNT reinforced nanocomposites, using combinations of Micro-Electro-Mechanical System (MEMS) based testing platforms, Atomic Force Microscopy (AFM), and Molecular Dynamics (MD) simulations. The proposed research involves the following tasks, (1) Development of novel, versatile and reliable MEMS based testing platforms to perform nanotube pull-out experiments for quantitative characterization of interfacial interaction between (a) SWNT and epoxy matrix, (b) SWNT and PDMS matrix, (c) SWNT and Au matrix; (2) Quantitative AFM study in both normal and lateral mode to provide direct and accurate assessment of adhesion and friction forces between the above mentioned reinforcement/matrix interfaces, in particular after the occurrence of de-bonding events; (3) Investigation of modified SWNT/matrix interfaces by different sidewall chemical functionalization methods using both the MEMS testing platform and AFM; (4) Theory and MD simulation of the key interfacial structures and relaxation mechanisms between SWNT reinforcement and matrix in correlation with observations from the experiments. If successful, the results of this research will be a vital step towards fundamental understanding of the physical nature of interfacial behaviors in nanocomposites, which in turn will enable the design of synthetic nanocomposites for improved mechanical performance. Graduate students and under-represented undergraduates will be recruited to work on this cutting-edge research, and will be given opportunities to present their results at research conferences and to local communities. Founded by the PI, the newly established Paslay Nanoscale Science and Engineering Educational Lab at Rice University will serve as a platform for outreach activities involving high school students and science teachers in greater Houston area, and introduce the findings from this research to the general public. In addition, the insights gained through this research will be effectively disseminated to students affiliate with the Clarkson Aerospace Minority Leader Research and Education Program, which is one of the minority outreach program here at Rice, focusing on Historically Black Colleges and Universities and Minority Institutions.

摘要该奖项的研究目标是采用一种系统的积分方法来研究SWNT增强纳米复合材料的界面，使用基于微机械机械系统（MEMS）的测试平台，原子力显微镜（AFM）和分子动力学（MD）模拟的组合。拟议的研究涉及以下任务，（1）开发新型，多功能和可靠的基于MEMS的测试平台，以执行纳米管的拔出实验，以定量表征（a）SWNT和环氧基质之间的界面相互作用，（B）SWNT和PDMS和PDMS Matrix，（C）SWNT和AU Matrix； （2）在正常模式和横向模式下进行定量AFM研究，以对上述增强/矩阵接口之间的粘附和摩擦力进行直接和准确的评估，尤其是在发生键入事件发生之后； （3）使用MEMS测试平台和AFM通过不同的侧壁化学功能化方法研究改良的SWNT/矩阵界面； （4）与实验的观察结果相关的SWNT增强和基质之间的关键界面结构和松弛机制的理论和MD模拟。如果成功的话，这项研究的结果将是对纳米复合材料中界面行为的物理性质的基本理解的至关重要的一步，这反过来又可以设计合成纳米复合材料以改善机械性能。研究生和代表性不足的本科生将被招募来从事这项尖端研究，并将有机会在研究会议和当地社区中呈现其成果。由PI创立的莱斯大学的新成立的帕斯莱纳米级科学和工程教育实验室将成为大休斯顿地区高中生和科学老师的外展活动的平台，并将这项研究的发现介绍给一般公众。此外，通过这项研究获得的见解将有效地传播到与克拉克森航空航天少数民族领袖研究与教育计划的附属有关的学生，该计划是赖斯的少数派外展计划之一，重点是历史悠久的黑人学院，大学和大学和少数群体机构。