Solid-solid phase transition of (1-C₁₄H₂₉NH₃)₂ZnCl₄ in nanopores of silica gel for thermal energy storage

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• 作者：Qi-Feng Li ; Chao Wang ; Xiao-Zheng Lan ; ^{lanxzh@sdau.edu.cn}
• 关键词：Phase change materials ; C14Zn ; SG ; Nanopores ; Composites
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：49-54
• 全文大小：1199 K
• 卷排序：28

文摘

Latent heat storage performance of a layered perovskite-type compound, 1-C14H29NH3)2ZnCl4 (C14Zn), embedded in a series of silica gel (SG) with pore sizes of d = 15–200 nm is investigated using differential scanning calorimetry (DSC), and powder X-ray diffractions (XRD). C14Zn in the nanopores of silica gel shows size-dependent phase transition temperature, enthalpy change and supercooling. They have a stable transition temperature and heat capacity at each size in a short-term thermal cycling. Similar X-ray diffraction patterns are observed for the nano-sized and the bulk C14Zn. The encapsulation of a phase change material in nanopores is a new way of tuning its thermal energy storage properties for a wider range of temperature regulation.