具有高热和光热转换性能的金属有机网络复合相变材料
Dian Wei1,2, Yi Wang1, Shuoshuo Yu1
1College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China.
Materials (Basel, Switzerland)
|August 28, 2025
概括
该研究使用聚乙烯糖醇 (PEG) 和新型金属有机网络 (CFK) 开发了一种形状稳定复合相变材料 (PCM). 复合PCM有效减少泄漏并提高热导率,从而改善热管理应用.
科学领域:
- 材料科学
- 化学工程
- 纳米技术
背景情况:
- 固体-液体相变材料 (PCM) 对于热管理至关重要,但存在漏电和低导热性.
- 开发形状稳定的PCM对于克服这些局限性并实现更广泛的应用至关重要.
研究的目的:
- 制造一种具有增强热性能和减少泄漏的新型形状稳定复合PCM.
- 研究这种复合PCM在可见光驱动的热能转换中的潜力.
主要方法:
- 通过将聚乙烯糖醇 (PEG) 与金属有机网 (CFK) 结合来合成复合PCM.
- CFK是由碳化多壁碳纳米管 (CMWCNTs),FeCl3和凯弗拉纳米纤维 (KNFs) 合成的.
- 复合PCM的形态,成分和热物理特性 (泄漏率,热导率,隐性热量,光吸收,光热转换效率,循环稳定性) 被系统评估.
主要成果:
- 含有89.9%PEG的复合PCM的泄漏率显著降低,为0.76%.
- 与纯PEG相比,热导率提高了170. 5%.
- 记录了高潜热值147.9 J·g−1 (聚变) 和143.7 J·g−1 (结晶).
- 复合PCM显示出极好的光吸收,光热转换效率为83.4%,以及卓越的循环稳定性.
结论:
- 开发的复合PCM有效地解决了泄漏问题,同时保持了卓越的热能存储和释放能力.
- 这种材料在可见光驱动的热能转换中的应用非常有前途,为高性能PCM提供了新的策略.
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