Limiting Growth Mechanisms and Continuous Manufacturing of Aligned Carbon Nanotube Films

定向碳纳米管薄膜的限制生长机制和连续制造

• 批准号: 0800213
• 负责人: Anastasios John Hart
• 金额: $ 35万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2008-06-15 至 2010-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800213&HistoricalAwards=false
• 关键词: Limiting; Growth; Mechanisms; Continuous; Manufacturing

This research will seek to enable a manufacturing technology for continuous large-scale production of aligned carbon nanotube (CNT) films by chemical vapor deposition (CVD), and for integration of these films in new hybrid material architectures including structural composites. A detailed study of catalyst activation, evolution, deactivation, and reactivation for substrate-bound growth of CNT films will contribute to a broader understanding of the growth mechanism of CNTs by CVD, particularly how the characteristics of a CNT forest depend on process variables in each of four critical processing stages. A predictive mathematical model will be created using our characterization data, particularly real-time kinetics measurements and spatial mapping of CNT forests by X-ray scattering. This will enable production of CNT forests having specified tolerances on diameter, length, and structural quality, for both batch-style and continuous processing. Direct integration of aligned CNT films to create nano-engineered advanced composites will overcome drawbacks of composites which are made by dispersion and mixing, and will serve as a testbed for evaluating the relationship between CNT characteristics and bulk engineering properties. Industry involvement in the continuing collaboration between PI?s through MIT?s NECST Consortium provides a strong application context for the research.Educationally, growth and manufacturing process models will be incorporated in the PI?s new graduate course on nanomaterials manufacturing at the University of Michigan, and the heated platform reactor used for our batch-style studies will be used in new undergraduate laboratory exercises in synthesis and characterization of CNTs and in design of experiments. Interactive lectures to high school students will introduce nanomaterials and feature application brainstorming and physics modeling challenges. Further, we will create visualizations such as high-resolution electron microscope images of CNTs and videos of CNT growth, as already pioneered by the PI?s nanobliss effort, to engage and educate broader and younger audiences.

这项研究将寻求通过化学气相沉积（CVD）实现连续大规模生产定向碳纳米管（CNT）薄膜的制造技术，并将这些薄膜集成到包括结构复合材料在内的新型混合材料架构中。 一个详细的研究，催化剂的活化，演变，失活，和再活化的碳纳米管薄膜的衬底结合的生长将有助于更广泛地了解碳纳米管的生长机制，通过CVD，特别是如何的碳纳米管森林的特性取决于工艺变量在四个关键的处理阶段。一个预测的数学模型将使用我们的表征数据，特别是实时动力学测量和空间映射的CNT森林的X射线散射。这将使CNT森林的生产具有特定的公差的直径，长度和结构质量，分批式和连续处理。定向碳纳米管薄膜的直接集成，以创建纳米工程先进的复合材料将克服复合材料的缺点，这是由分散和混合，并将作为一个测试平台，用于评估CNT特性和散装工程性能之间的关系。 行业参与PI之间的持续合作？通过MIT？的NECST联盟提供了一个强大的应用背景下的研究。教育，增长和制造过程模型将被纳入PI？的新的研究生课程纳米材料制造在密歇根大学，和加热平台反应器用于我们的批量式的研究将用于新的本科实验室练习中的合成和表征的碳纳米管和实验设计。高中学生的互动讲座将介绍纳米材料和功能应用头脑风暴和物理建模的挑战。此外，我们将创建可视化，如高分辨率的电子显微镜图像的碳纳米管和视频的碳纳米管生长，已经率先由PI？的nanobliss努力，以吸引和教育更广泛和更年轻的观众。