Preparation and Characterization of Polyethylene Glycol Wood Composite Phase Change Materials | 聚乙二醇木材复合相变储能材料的制备及表征

chinois. 以木材为骨架,聚乙二醇-10000为相变基元,通过木材的毛细管吸收效应,物理吸附聚乙二醇-10000,制备聚乙二醇木材复合相变储能材料。通过傅里叶变换红外（FTIR）谱图分析官能团,扫描电子显微镜（SEM）分析微观形貌,X射线衍射（XRD）分析结晶度,可知木材与聚乙二醇能很好的相互结合,并且随着聚乙二醇-10000含量的增加,聚乙二醇木材复合相变储能材料结晶度逐渐增加;通过差示扫描量热（DSC）以及热重（TG）分析可知,聚乙二醇木材复合相变储能材料的相变焓先增加后减少,最大相变焓值为43.22J・g-1,热稳定性明显增加;聚乙二醇的无水乙醇溶液对木材渗透性的研究表明,木材吸附聚乙二醇主要为抛物线状三段式吸收。

anglais. Through capillary adsorption effect of wood with physical adsorption of polyethylene glycol（PEG）-10000, polyethylene glycol wood composite phase change materials（PCM）was prepared with wood as skeleton, and polyethylene glycol-10000（PEG-10000）as phase transformation unit. Functional groups were analyzed by fourier transform infrared（FTIR）spectra, microscopic morphology was analyzed by scanning electron microscopy（SEM）and degree of crystallinity was analyzed by X-ray diffraction（XRD）, it is concluded that wood was well combined with PEG and the degree of crystallinity of PCM increased gradually with PEG-10000 content going up. By using differential scanning calorimetry（DSC）and thermogravimetry（TG）analysis, the enthalpy of phase change was first increased and then decreased, the largest phase change enthalpy is 43.22 J・g-1 and the thermal stability was obviously increased. The study of permeability of PEG ethanol solution to wood shows that PEG adsorption of wood was mainly parabolic three-stage absorption.