混合聚合物盐凝用于可逆捕获基于盐水合物的热能储能材料
Kartik Kumar Rajagopalan1, Sebastian Haney2, Patrick J Shamberger1
1Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States.
ACS applied engineering materials
|March 28, 2024
概括
研究人员为无机盐水合物相变材料 (PCM) 开发了形状稳定的聚合物凝 (salogels). 这项创新可以防止泄漏和分离,通过耐用,可回收材料增强热管理应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 热力工程是热力工程中的一个.
背景情况:
- 无机盐水合物相变材料 (PCM) 提供高能量储存,但粘度低,导致泄漏和相隔离.
- 现有的PCM形状稳定方法受到聚合物溶解度和凝行为的限制,特别是高离子度.
- 开发具有成本效益,坚固性和温度响应的形状稳定型PCM对于先进的热管理至关重要.
研究的目的:
- 为化六水合物 (CaCl2·6H2O,CCH) 制造坚固,耐温度,稳定形状的聚合物凝 (盐凝).
- 为了克服与高化物离子度和聚合物化效应相关的挑战.
- 为了达到可调节的凝温度并保持高热能储能能力.
主要方法:
- 使用聚乙烯醇 (PVA) 和超高分子量聚烯胺 (PAAm) 形成了一个混合网络,氧作为交叉链接器.
- 凝到溶的过渡温度 (Tgel) 通过调整聚合物和交叉连接剂度来调整.
- 评估了由此产生的混合盐凝的热性能和循环稳定性.
主要成果:
- 强大的混合盐凝成功地用<5%重量%的聚合物含量合成.
- 凝到溶的过渡温度 (Tgel) 可以在30-80°C之间调节.
- 混合盐凝保留了约95%的纯CCH的聚变热,并在50个化/结晶周期中表现出稳定性.
结论:
- 一种新的双聚合物策略有效地从CaCl2·6H2O中制造出形状稳定的,温度可逆的盐凝.
- 混合网络设计克服了高离子强度环境中单聚合物系统的局限性.
- 这些先进的盐凝显示出对高效和可靠的热能存储应用的显著前景.
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