灵活的相变膜具有特殊的耐水和耐温度性能,用于智能个人热保护
Ganlu Wang1,2, Ling Liu2,3, Siyuan Dou2,3
1Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
ACS applied materials & interfaces
|December 10, 2024
概括
研究人员开发了一种灵活的相变材料 (PCM) 薄膜,使用聚乙烯糖醇 (PEG) 网络中的超性氧化气凝粒 (SSAP). 这种创新材料增强了在极端温度下个人热保护的热调节.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 织工程 织工程 织工程
背景情况:
- 在极端环境中,个人热保护至关重要,全球气温上升加剧了热应激挑战.
- 换相材料 (PCM) 通过在相位过渡期间吸收/释放热量来提供创新的热调节.
- 目前的PCM在可穿戴系统中面临的局限性是由于机械性能,潜在热量,温度抵抗和响应时间.
研究的目的:
- 开发一种灵活的复合PCM薄膜,用于增强可穿戴的热保护.
- 解决传统PCM在机械性能和热反应方面的局限性.
- 研究超疏水性氧化气凝粒 (SSAP) 和一个交联的聚乙烯糖醇 (PEG) 网络的协同效应.
主要方法:
- 将SSAP集成到一个交叉连接的PEG网络中,以创建一个复合PCM薄膜.
- 描述膜的机械性能,潜热和热反应.
- 评估SSAP提供的防水性和协同热绝缘.
主要成果:
- 复合PCM薄膜表现出自我支,高灵活性和增强的耐热性.
- 实现了 113.1146.9 J g-1 的潜热范围,可调节 SSAP 含量.
- 与纯PEG.相比,显示温度下降2.65倍 (13.8°C在80°C) 和加热速度减速275%的增强.
结论:
- 提出了一种新的策略,用于制备具有改进的热调节的柔性,耐温度的PCM薄膜.
- 复合PCM薄膜显示了先进的可穿戴热保护系统的巨大潜力.
- 这项研究强调了如何降低隐性热量可以矛盾地导致增强的热调节能力.
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