Engineering attractive interaction in ZIF-based phase change materials for boosting electro- and photo- driven thermal energy storage
Engineering attractive interaction in ZIF-based phase change materials for boosting electro- and photo- driven thermal energy storage
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在基于 ZIF 的相变材料中设计有吸引力的相互作用，以促进电和光驱动的热能存储
DOI：
10.1016/j.cej.2021.133007
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发表时间：
2022
影响因子：
15.1
通讯作者：
Ge Wang
中科院分区：
文献类型：
--
作者：
Cheng Dong;Ang Li;Chen Wang;Jiao Li;Hongyi Gao;Xiao Chen;Yuean Wang;Lei Li;Yu Zheng;Ge Wang
金属有机骨架具有丰富的空间，可以选择性地吸收相变材料（PCM）分子，有时还可以进行化学转化。然而，金属有机骨架与PCM之间强烈的吸引相互作用严重阻碍了PCM充分的晶态-非晶态转变。在此，我们提出了一种有吸引力的基于层叠沸石咪唑盐框架（ZIF）的相变材料（聚乙二醇/碳cloth@ZIF， PEG/CC@ZIF）的相互作用工程策略，以提高晶体-非晶态转变行为和电/光驱动的热性能。羧基修饰的CC支架调节了ZIF与PEG之间的吸引相互作用，增强了相变复合材料的储能能力。此外，沉积在CC表面的ZIF纳米片减少了固气界面的对流热损失，CC支架促进了电子的传递和光子的穿透，从而显著增强了电和光驱动的热能储存。此外，zif诱导的PEG和CC之间的链效应提高了PEG/CC@ZIF的力学性能。值得注意的是，市售的过渡金属氧化物光催化剂可以通过配位化学工程将其均匀喷涂在PEG/CC@ZIF表面，用于多功能相变复合材料。
Metal organic frameworks contain abundant empty space for selectively absorbing phase change materials (PCM) molecules and sometimes chemically transformed. However, the strong attractive interaction between metal organic frameworks and PCM severely blocks sufficient crystalline-amorphous state transition of PCM. Herein, we proposed an attractive interaction engineering strategy on hierarchical zeolitic imidazolate frameworks (ZIF) based phase change materials (polyethylene glycol/carbon cloth@ZIF, PEG/CC@ZIF) for boosting crystalline-amorphous state transition behavior and electro-/photo- driven thermal performance. Carboxyl-modified CC scaffold regulates attractive interaction between ZIF and PEG, which enhances energy storage capacity of the phase change composite. Moreover, ZIF nanoflakes deposited on the surface of CC reduce the convective heat loss at the solid–gas interface, and CC scaffold facilitates electron transportation and photon penetration, thus significantly enhancing electro- and photo- driven thermal energy storage. Furthermore, ZIF-induced chain effect between PEG and CC enhances the mechanical properties of PEG/CC@ZIF. Notably, commercially available transition metal oxide photocatalyst can be uniformly sprayed on the surface of PEG/CC@ZIF through coordination chemical engineering for multi-functional phase change composite.