NIRT: Nanotube Based Structures for High Resolution Control of Thermal Transport

NIRT：基于纳米管的热传输高分辨率控制结构

• 批准号: 0404370
• 负责人: Cecilia Richards
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0404370&HistoricalAwards=false
• 关键词: NIRT; Nanotube; Based; Structures; Resolution

AbstractProposal Number: CTS-0404370Principal Investigator: Cecilia D. RichardsAffiliation: Washington State UniversityProposal Title: NIRT: Nanotube based structures for high resolution control of thermal transportThis proposal was received in response to Nanoscale Science and Engineering initiative, NSF 03-043, category NIRT. The focus of this work is the use of mixed-scale architectures to bridge scales from nanometer level structures to micrometer level components to millimeter level devices and materials. We propose to incorporate carbon nanotubes into microscale composites to create a new kind of mesoscale device, a thermal switch. Arrays of thermal switches will then be produced in batch to create sheets with spatially and temporally controllable "digital" thermal conductivity. Mixed-scale architectures can be used to bridge scales from nanometers to micrometers to milimeters in order to manufacture materials and devices whose pertinent dimensions range from nanoscale to microscale to mesoscale. Carbon nanotubes (CNT's) are inherently one-dimensional mixed-scale structures, with diameters in the range of nm and lengths in the range of mm. We take advantage of this 103 aspect ratio to bring superior thermal and mechanical properties (due to the CNT's nanometer scale diameters), to micro-scale components (making use of the CNT's micrometer scale lengths). Many microelectromechanical systems (MEMS) are also inherently two-dimensional mixed-scale structures with thicknesses in the range of mm and planar dimensions in the range of mm. We take advantage of this 103 aspect ratio, to bring the superior thermal and mechanical properties of the micro-scale components to effective use on the meso-scale. Carbon nanotubes will be synthesized and then extensively characterized. The nanoscale thermal and mechanical properties of the CNT's will be modeled. The CNT's will then be assembled into aligned arrays within a matrix and formed into micron scale blocks. The thermal and mechanical properties of the aligned CNT composite blocks will then be characterized and modeled. Finally, the CNT composite blocks will be utilized to fabricate prototypes of thermal switch devices.The educational plan targets undergraduates, under represented groups, K-12, and teachers. This work will result in strong interactions between a large, rural research institution and two urban campuses, making it easier for students from a wide range of demographics to participate in cutting edge research projects. Instrumentation for characterizing thermo-mechanical responses of nanotube assemblies will be created, allowing future work to proceed in these areas. High school teachers from the Northwest will be able to get hands on tools to bring nanotechnology back to their schools, helping to motivate future generations of scientists and engineers. Research on this project will closely couple undergraduates and graduate students, helping to foster integrating research into all levels of education, particularly in groups traditionally under-represented from science and engineering. The research is being funded by the Thermal Transport and Thermal Processing Program of the Chemical and Transport Systems Division.

摘要提案编号：CTS-0404370 首席研究员：Cecilia D. Richards 隶属关系：华盛顿州立大学提案标题：NIRT：基于纳米管的热传输高分辨率控制结构该提案是为了响应纳米科学与工程倡议，NSF 03-043，NIRT 类别而收到的。 这项工作的重点是使用混合尺度架构来连接从纳米级结构到微米级组件再到毫米级器件和材料的尺度。 我们建议将碳纳米管纳入微米级复合材料中，以创建一种新型的介观器件，即热开关。 然后将批量生产热开关阵列，以创建具有空间和时间可控的“数字”导热率的片材。 混合尺度架构可用于连接从纳米到微米到毫米的尺度，以制造相关尺寸范围从纳米尺度到微米尺度再到介观尺度的材料和设备。 碳纳米管（CNT）本质上是一维混合尺度结构，直径在纳米范围内，长度在毫米范围内。 我们利用 103 的长宽比为微米级组件（利用 CNT 的微米级长度）带来卓越的热性能和机械性能（由于 CNT 的纳米级直径）。 许多微机电系统 (MEMS) 本质上也是二维混合尺度结构，厚度在毫米范围内，平面尺寸在毫米范围内。 我们利用 103 的长宽比，将微尺度组件卓越的热性能和机械性能有效地应用于细观尺度。碳纳米管将被合成，然后被广泛表征。 碳纳米管的纳米级热性能和机械性能将被建模。然后，碳纳米管将被组装成矩阵内的对齐阵列，并形成微米级块。 然后对排列好的碳纳米管复合块的热性能和机械性能进行表征和建模。 最后，CNT 复合材料块将用于制造热开关器件的原型。该教育计划针对本科生、代表性群体、K-12 和教师。这项工作将导致大型农村研究机构和两个城市校园之间的强有力的互动，使来自不同人群的学生更容易参与前沿研究项目。 将创建用于表征纳米管组件热机械响应的仪器，从而使未来的工作能够在这些领域进行。 来自西北地区的高中教师将能够获得将纳米技术带回学校的工具，帮助激励未来几代科学家和工程师。 该项目的研究将紧密结合本科生和研究生，有助于促进将研究融入各级教育，特别是传统上科学和工程领域代表性不足的群体。 该研究由化学和运输系统部门的热运输和热处理项目资助。