I-Corps: High thermal conductivity polymers and phase change materials based on graphene

I-Corps：基于石墨烯的高导热聚合物和相变材料

• 批准号: 2330247
• 负责人: Jivtesh Garg
• 金额: $ 5万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2330247&HistoricalAwards=false
• 关键词: Corps; thermal; conductivity; polymers; phase

The broader impact/commercial potential of this I-Corps project is the development of high thermal conductivity polymers and phase change materials. The proposed high thermal conductivity polymers may replace metals in wide range of thermal management technologies leading to advantages including ease of processing, corrosion resistance, lower weight, and lower carbon footprint as polymers require less energy to process compared to metals. These polymers may improve thermal management in mobile electronics such as laptops and mobile phones, in high brightness light emitting diodes (LEDs), in automobiles and aerospace applications, and in offshore heat exchangers where such polymers, due to their corrosion resistance, would be able to replace expensive metals like titanium. Similarly high thermal conductivity phase change materials may enable superior thermal management in batteries, by absorbing thermal energy generated during charging process, mitigating the increase in temperature during these periods, thus improving the life of the battery. Batteries with improved thermal management are essential to the successful design and development of next-generation electric vehicles. High thermal conductivity phase change materials also have tremendous potential as next generation energy storage materials, key to the efficient utilization of renewable sources of energy. This I-Corps project is based on the development of high thermal conductivity polymers and phase change materials through use of optimally prepared expanded graphite. Intercalating agents used in preparing expanded graphite have been shown to have a significant impact on thermal conductivity of resulting polymer-graphite composites. Further, different intercalating agents lead to different degrees of oxidation of graphite, thus impacting the oxidative damage to graphite, which in turn results in different graphite thermal conductivities. The effect of different intercalating agents results in different thermal conductivities of the polymer composites and phase change materials. Overall, the use of an optimum intercalating agent leads to a maximum enhancement in thermal conductivity. In addition, this leads to a decrease in the amount of graphite needed for achieving a desired enhancement in thermal conductivity, which may lower the cost of the composite. These composites also are found to impact thermal conductivity of phase change materials where the optimum intercalating agent may result in 50 to 60% higher thermal conductivity.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.

这个I-Corps项目更广泛的影响/商业潜力是开发高导热性聚合物和相变材料。所提出的高热导率聚合物可以在广泛的热管理技术中取代金属，从而产生包括易于加工、耐腐蚀性、较低重量和较低碳足迹的优点，因为与金属相比，聚合物需要较少的能量来加工。这些聚合物可以改善移动的电子设备如笔记本电脑和移动的电话、高亮度发光二极管（LED）、汽车和航空航天应用以及海上热交换器中的热管理，在海上热交换器中，由于这些聚合物的耐腐蚀性，这些聚合物将能够取代昂贵的金属如钛。类似地，高热导率相变材料可以通过吸收在充电过程期间产生的热能、减轻在这些时间段期间的温度升高、从而提高电池的寿命来实现电池中的上级热管理。具有改进的热管理的电池对于下一代电动汽车的成功设计和开发至关重要。高导热性相变材料作为下一代储能材料也具有巨大的潜力，这是有效利用可再生能源的关键。这个I-Corps项目的基础是通过使用最佳制备的膨胀石墨开发高导热性聚合物和相变材料。用于制备膨胀石墨的插层剂已经显示出对所得聚合物-石墨复合材料的热导率具有显著影响。此外，不同的插层剂导致石墨的不同程度的氧化，从而影响对石墨的氧化损伤，这又导致不同的石墨热导率。不同插层剂的作用导致聚合物复合材料和相变材料的热导率不同。总的来说，使用最佳的插层剂导致热导率的最大增强。此外，这导致实现所需的热导率增强所需的石墨量减少，这可以降低复合材料的成本。这些复合材料也被发现影响相变材料的导热性，其中最佳的插层剂可能会导致50至60%的高导热性。该奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。