基于隔热石墨烯和化复合材料的可拉伸散热板:在重复拉伸应变下提供稳定的导热的不对称弹性体网络
Sang-Mi Jeong1, Taekyung Lim1, Jonguk Yang1
1Major in Nano·Semiconductor, School of Electronic Engineering, Kyonggi University Suwon Gyeonggi-do 16227 Republic of Korea hsseo@kgu.ac.kr shju@kgu.ac.kr.
Nanoscale advances
|July 31, 2025
概括
研究人员开发了一种灵活的散热板,在弹性体中使用绝缘石墨烯和化. 这种材料在应力下保持导热性,为灵活的电子产品提供了卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 稳定的热管理对于小型化和机械变形的电子设备至关重要.
- 现有的材料通常在机械应力下难以保持导热稳定性.
研究的目的:
- 开发一种灵活的散热板,具有高导热率和在变形下优异的稳定性.
- 研究复合材料填充结构在提高热性能和耐用性方面的作用.
主要方法:
- 使用绝缘石墨烯 (I-Gr),板状化 (BN-P) 和聚合球形BN (BN-A) 在乙烯-乙烯-乙烯 (SEBS) 弹性体内制造柔性复合材料.
- 热导率 (TC) 的表征及其变化 (ΔTC) 在各种拉伸应变下 (高达100%).
- 通过循环拉伸力应变试验 (500个循环以50%的应变和400%的延伸) 评估长期耐用性.
主要成果:
- 复合材料的初始导热率 (TC) 超过2.0 W m-1 K-1.1.
- TC减小 (ΔTC) 是微不足道的 (<8%在50%的压力下,<10%在100%的压力下),显示出优异的TC稳定性.
- 该材料在500个循环后保持了TC和结构完整性,其中50%的拉伸力和400%的延伸力,性能优于基于CNT的复合材料.
结论:
- 独特的复合结构,利用不对称的2D层和聚合的球形填充物,有效地增强了热传输,并保持了应变下的网络连续性.
- 开发的材料为下一代灵活电子产品的热管理提供了有前途的解决方案,包括可穿戴设备和软机器人.
- 本研究提出了一个可行的设计策略,用于高性能,耐用和弹性散热材料.
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