Zhu Suhong, Ji Tao, Yang Bin, Yang Zhengxian
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.
RSC Adv. 2019 Jul 29;9(41):23435-23443. doi: 10.1039/c9ra03329g.
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.
通过溶液浸渍法制备了一种基于聚乙二醇（PEG）和表面改性层状双氢氧化物（LDHs）的新型形状稳定相变材料。PEG作为相变材料能够储存和释放热能；3-氨丙基三乙氧基硅烷（KH550）用于改性LDHs的表面（KH-LDHs），然后KH-LDHs作为载体在高温下保持熔融PEG的固态。PEG/KH-LDHs复合材料中PEG的最大质量分数为55%。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、差示扫描量热法（DSC）、热重（TG）分析和紫外可见吸收光谱对复合材料的详细结构、热性能和紫外吸收进行了系统表征。结果表明，PEG/KH-LDH复合材料具有合适的相变温度、可观的焓、良好的热稳定性以及显著的紫外吸收能力。作为一种新型形状稳定相变材料，PEG/KH-LDH复合材料有望为寻找建筑和路面材料热管理的有效措施做出贡献。
