Cellulose-derived solid-solid phase change thermal energy storage membrane with switchable optical transparency
Cellulose-derived solid-solid phase change thermal energy storage membrane with switchable optical transparency
复制标题
具有可切换光学透明度的纤维素固相变热能存储膜
DOI：
10.1016/j.cej.2022.134851
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发表时间：
2022-01-29
影响因子：
15.1
通讯作者：
Xie, Yanjun
中科院分区：
文献类型：
--
作者：
Lang, Zhen;Ju, Yunjie;Xie, Yanjun
可切换的光学透明度是固液相变材料在相变过程中的固有特性。然而，由于不透明的多孔约束材料和核壳结构，合成形状稳定的pcm通常会牺牲其可切换的光学透明度。在这里，我们提出了一种共聚诱导的形状稳定策略，该策略以纤维素10-十一烯醇酯（CUE）作为聚合物基交联剂，以各种烷基丙烯酸酯（AAs）作为相变单体，生产出具有高效热能储存和优异热可逆光学透明度的固体-固体相变膜（CUE-AAs）。这些制备的CUE-AAs膜在相变过程中具有优异的可切换光学透明度，从大约低于5%到超过90%，并且透明度的响应温度可以在23-67？通过使用不同的原子吸收剂来达到C度。此外，十六烷、十八烷和十二烷三种正构烷烃被物理包裹在cu - aas交联网络中，提高了储热性能，最大熔化焓可达166.5 J/g。此外，表面修饰的掺锑氧化锡纳米颗粒的引入显著提高了光-热转换效果，使所得到的膜具有很高的热管理材料应用潜力。因此，这些基于CUE-AAs的pcm具有优异的热可逆光学透明度、高热存储性能、卓越的光热存储效率和高热稳定性等多种特性，使其适用于广泛的应用，包括智能光学器件和太阳能储能器件。
Switchable optical transparency is an intrinsic property for solid-liquid phase change materials (PCMs) during phase change processes. However, due to non-transparent porous confinement materials and core-shell struc-tures, the synthesis of shape-stabled PCMs typically sacrifices their switchable optical transparency. Here, we present a copolymerization-induced shape-stabilization strategy that uses cellulose 10-undecenoyl ester (CUE) as a polymer-based crosslinker and a variety of alkyl acrylates (AAs) as phase change monomers to produce sol-id-solid phase change membranes (CUE-AAs) with high efficient thermal energy storage and excellent thermo-reversible optical transparency. These as-prepared CUE-AAs membranes present excellent switchable optical transparency from approximately below 5% to over 90% during phase change processes, and the responsive temperature of the transparency could be tailored in the range of 23-67?degrees C by using different AAs. Furthermore, three kinds of n-alkanes including hexadecane, octadecane, and docosane were physically entrapped in the CUE-AAs cross-linked networks to enhance the thermal energy storage performance, leading to a maximum melting enthalpy of up to 166.5 J/g. Moreover, the introduction of surface modified antimony-doped tin oxide nano-particles significantly improved the light-to-thermal conversion effect, endowing the resulted membranes with high potential in application as thermal management material. Thus, the diverse properties of these CUE-AAs based PCMs, such as excellent thermo-reversible optical transparency, high thermal energy storage perfor-mance, remarkable photo-thermal storage efficiency, and high thermal stability, made them suitable for a wide range of applications, including intelligent optical devices and solar energy storage devices.