Preparation and characterization of PEG/surface-modified layered double hydroxides as a new shape-stabilized phase change material

Suhong Zhu; Tao Ji; Bin Yang; Zhengxian Yang

doi:10.1039/c9ra03329g

Preparation and characterization of PEG/surface-modified layered double hydroxides as a new shape-stabilized phase change material

RSC Adv. 2019 Jul 29;9(41):23435-23443. doi: 10.1039/c9ra03329g.

Authors

Suhong Zhu^{1

2}, Tao Ji³, Bin Yang⁴, Zhengxian Yang^{1

3}

Affiliations

¹ Fujian Provincial University Research Centre for Advanced Civil Engineering Materials, Fuzhou University Fuzhou 350116 China.
² Department of Civil and Building Engineering, Nanchang Institute of Technology Nanchang 330099 China.
³ College of Civil Engineering, Fuzhou University Fuzhou 350116 China zxyang@fzu.edu.cn zhengxian.yang@gmail.com.
⁴ Chengdu Design & Research Institute of Building Materials Industry Co., Ltd Chengdu 610051 China.

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.