摘要
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。
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.
出处
《林业科学》
CAS
CSCD
北大核心
2012年第9期120-126,共7页
Scientia Silvae Sinicae
基金
国家自然科学基金资助项目(31070633)
人力资源和社会保障部留学回国人员科技活动择优资助项目(07041311401)
东北林业大学研究生论文资助项目(ST1P10)
关键词
杨木
聚乙二醇
相变焓
相变储能材料
热稳定性
poplar
polyethylene glycol
phase change enthalpy
phase change material
thermal stability
