Solid-solid phase transition of (1-C_(14)H_(29)NH_3)_2ZnCl_4 in nanopores of silica gel for thermal

• 作 者: Qi-Feng Li Chao Wang Xiao-Zheng Lan
• 机 构: College of Chemistry and Materials, Shandong Agricultural University,
• 出 处: Chinese Chemical Letters
• 发表日期: 2017年01期
• 关键词: silica encapsulation latent calorimetry sized enthalpy perovskite layered sizes

Latent heat storage performance of a layered perovskite-type compound, 1-C_(14)H_(29)NH_3)_2ZnCl_4(C_(14)Zn),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). C_(14)Zn 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 Xray diffraction patterns are observed for the nano-sized and the bulk C_(14)Zn. 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.

Latent heat storage performance of a layered perovskite-type compound, 1-C_ (14) H_ (29) NH_3) _2ZnCl_4 (C_ (14) Zn) embedded in a series of silica gel -200 nm is investigated using differential scanning calorimetry (DSC), and powder X-ray diffractions (XRD). C_ (14) Zn in the nanopores of silica gel shows size-dependent phase transition temperature, enthalpy change and supercooling. stable transition temperature and heat capacity at each size in a short-term thermal cycling. Similar Xray diffraction patterns are observed for the nano-sized and the bulk C_ (14) Zn. 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.