在3D结构碳框架中的热接口工程,用于具有高热导电性的相变复合材料
Yafang Zhang1,2, Zhao Jiang1, Yu Qin1,2
1College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
ACS applied materials & interfaces
|October 3, 2023
概括
工程碳结合石墨纤维网络显著提高了相变材料的导热性和稳定性. 接口工程优化了热传输,克服了热能存储应用的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 纳米技术纳米技术
背景情况:
- 换相材料 (PCM) 提供高效的热能存储,但其热导率 (TC) 低,形状稳定性差.
- 提高TC和形状稳定性对于PCM在热管理中的实际应用至关重要.
研究的目的:
- 通过构建3D碳结合石墨纤维 (CBGF) 网络,提高PCM的导热性和形状稳定性.
- 研究热接口工程对PCM复合材料性能的影响,考虑填充器-矩阵 (F-M) 和填充器-填充器 (F-F) 接口.
主要方法:
- 制造一个3DCBGF网络结构,作为一个导热框架和PCM封闭.
- 对F-M和F-F接口进行系统分析,以优化声子传输和最大限度地减少散射.
- 由此产生的PCM复合材料的热导率和相变行为的表征.
主要成果:
- 优化的PCM复合材料实现了显著增强的TC 45.48W·m-1·K-1,比纯PCM高188.5倍.
- 观察到高TC增强每体积百分比填充剂 (TCEF) 的831%每1体积百分比负载.
- 3D网络为PCM提供了有效的空间限制,确保了相位过渡期间的形式稳定性.
结论:
- 接口工程对于开发高TC和形态稳定的相变复合材料至关重要.
- 三维CBGF网络方法为克服PCM在热能存储中的局限性提供了一个有希望的策略.
- 这些发现为先进的热管理材料的合理结构设计提供了宝贵的指导.
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