CAREER: Thermal Transport in Polymer Nanofibers under Strain Modulation

职业：应变调制下聚合物纳米纤维的热传输

• 批准号: 2340208
• 负责人: Woochul Lee
• 金额: $ 54.65万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-03-01 至 2029-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2340208&HistoricalAwards=false
• 关键词: CAREER; Thermal; Transport; Polymer; Nanofibers; CAREER; Thermal; Transport; Polymer; Nanofibers

The increasing need for efficient heat dissipation in modern technologies necessitates materials that are not only excellent thermal conductors but also cost-effective, easy to manufacture, lightweight, and corrosion-resistant. Polymers, often the material of choice due to their versatility, meet most of these criteria. However, their inherently low thermal conductivity limits their application in advanced thermal management systems. This challenge has led to extensive research efforts aimed at enhancing the thermal conductivity of polymers. Despite these efforts, a comprehensive understanding of the heat transfer mechanisms within polymers remains elusive. This knowledge gap poses a significant barrier to the development of polymers with high thermal conductivity, which are critically needed in various advanced technological applications. To address this challenge, this CAREER project seeks to develop an innovative experimental technique and provide a deeper understanding of thermal transport in polymer nanofibers. This research is integrated with educational and outreach activities, including a summer workshop on thermal engineering, extensive undergraduate research opportunities, and targeted outreach programs for underrepresented Native Hawaiian students. These initiatives are designed to foster interest in scientific research and nurture the next generation of scientists and engineers.The primary objective of this research is to deeply understand the mechanisms of thermal transport in polymer nanofibers. Due to the complex interplay between thermal transport, internal structure, and chemical composition, many facets of polymer thermal transport remain unclear. This project proposes several research goals: 1) the development of an experimental platform to measure thermal transport properties in response to strain modulation, 2) the investigation of thermal transport and internal structure variations under different strain conditions, and 3) the exploration of fundamental scientific principles governing thermal transport in polymers. The successful completion of this project will elucidate the relationship between microstructure and thermal transport in polymer nanofibers, revealing the mechanisms that could enhance thermal transport under strain. These findings will be pivotal in establishing principles for designing and synthesizing high thermal conductivity polymers, crucial for a wide range of technological applications. This project is jointly funded by the Thermal Transport Processes (TTP) program of the Chemical, Biochemical, Environmental and Transport (CBET) Systems Division in the Engineering (ENG) Directorate, and the Established Program to Stimulate Competitive Research (EPSCoR) at NSF.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

对现代技术中有效散热的需求越来越多，不仅需要优秀的热导体，而且还需要具有成本效益，易于制造，轻巧和耐腐蚀的材料。聚合物通常是由于其多功能性而选择的材料，它符合大多数这些标准。但是，它们固有的较低的导热率限制了它们在高级热管理系统中的应用。这一挑战导致了广泛的研究工作，旨在提高聚合物的导热率。尽管做出了这些努力，但对聚合物中传热机制的全面了解仍然难以捉摸。该知识差距为具有高热导率的聚合物的发展带来了一个重大障碍，在各种先进的技术应用中，这是至关重要的。为了应对这一挑战，该职业项目旨在开发一种创新的实验技术，并对聚合物纳米纤维中的热运输有更深入的了解。这项研究与教育和宣传活动融合在一起，包括有关热力学工程的夏季研讨会，广泛的本科研究机会，以及针对夏威夷人代表不足的本地学生的针对性外展计划。这些举措旨在促进对科学研究的兴趣，并培养下一代科学家和工程师。这项研究的主要目标是深入了解聚合物纳米纤维中热运输的机制。由于热传输，内部结构和化学组成之间的复杂相互作用，因此聚合物热传输的许多方面尚不清楚。该项目提出了几个研究目标：1）开发一个实验平台，以响应劳累调节，测量热运输特性，2）在不同的应变条件下进行热传输和内部结构变化的研究，以及3）探索了基本科学原理，控制聚合物中的热运输。该项目的成功完成将阐明聚合物纳米纤维中微观结构与热传输之间的关系，从而揭示了可以增强菌株下热传输的机制。这些发现将在建立设计和合成高热导率聚合物的原理方面至关重要，这对于广泛的技术应用至关重要。 该项目由工程局（ENG）局的化学，生化，环境和运输（CBET）系统部的化学，生化，环境和运输（CBET）系统部（ENG）共同资助。NSF刺激竞争性研究（EPSCOR）的既定计划（EPSCOR）。这项奖项奖励NSF的法定任务和审查的范围通过评估的范围，这是通过评估的范围来进行评估的。