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.

该I-Corps项目的更广泛的影响/商业潜力是开发高热导率聚合物和相变材料。拟议的高热导率聚合物可能会取代广泛的热管理技术中的金属，从而带来了优势，包括易于加工，耐腐蚀性，较低的重量和较低的碳足迹，因为聚合物与金属相比需要更少的能量来处理。这些聚合物可以改善流动电子产品的热管理，例如笔记本电脑和手机，在高亮度光发射二极管（LED），汽车和航空航天应用中以及在海上热交换器中，由于耐腐蚀性，这些聚合物将能够替换诸如钛金属等昂贵的金属。同样，高热电导率相变的材料可以通过吸收充电过程中产生的热能，从而减轻这些时期内温度的升高，从而改善电池寿命，从而使电池中的高温管理材料。改进的热管理电池对于成功设计和开发下一代电动汽车至关重要。作为下一代储能材料，高热导率相变材料也具有巨大的潜力，是可再生能源有效利用的关键。该I-Corps项目基于使用最佳准备的扩展石墨的高热导率聚合物和相变材料的发展。已证明用于制备扩展石墨的互化剂对产生的聚合物 - 丝岩复合材料的热导率有显着影响。此外，不同的插入剂导致石墨氧化程度不同，从而影响石墨氧化损伤，这又导致不同的石墨热导率。不同互化剂的作用导致聚合物复合材料和相变材料的不同导电性。总体而言，使用最佳互化剂会导致热导率的最大增强。此外，这导致减少了达到所需的导热率增强所需的石墨量，这可能会降低复合材料的成本。这些复合材料还被发现会影响相变材料的热导率，在这些材料中，最佳互化剂可能会导致50％至60％的热导率提高。该奖项反映了NSF的法定任务，并且认为值得通过基金会的智力优点和更广泛的影响来通过评估来获得支持。