Preparation and characterization of PEG/surface-modified layered double hydroxides as a new shape-stabilized phase change material |
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Authors: | Suhong Zhu Tao Ji Bin Yang Zhengxian Yang |
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Affiliation: | Fujian Provincial University Research Centre for Advanced Civil Engineering Materials, Fuzhou University, Fuzhou 350116 China ; Department of Civil and Building Engineering, Nanchang Institute of Technology, Nanchang 330099 China ; College of Civil Engineering, Fuzhou University, Fuzhou 350116 China.; Chengdu Design & Research Institute of Building Materials Industry Co., Ltd, Chengdu 610051 China |
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Abstract: | A new shape-stabilized phase change material based on polyethylene glycol (PEG) and surface-modified layered double hydroxides (LDHs) was prepared by a solution impregnation method. PEG enabled thermal energy storage and release as a phase change material; 3-aminopropyl triethoxysilane (KH550) was used to modify the surface of LDHs (KH-LDHs) which then acted as a carrier to keep the solid form of the molten PEG at high temperature. The maximum weight percentage of PEG confined in the PEG/KH-LDHs composite was 55%. The detailed structures, thermal properties and UV absorption of the composite were characterized systematically by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric (TG) analysis and UV-vis absorption spectra. Results show that the PEG/KH-LDH composite has a suitable phase change temperature, considerable enthalpy, and good thermal stability as well as remarkable ultraviolet absorption ability. As a new shape-stabilized phase change material, the PEG/KH-LDH composite is expected to contribute to the effort of searching effective measures for thermal management of building and pavement materials.A new shape-stabilized phase change material based on polyethylene glycol (PEG) and surface-modified layered double hydroxides (LDHs) was prepared. Its potential benefits for thermal management of building and pavement materials is highly expected. |
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