中文摘要：

以制备的具有微／纳多孔结构的纤维素为骨架，聚乙二醇（PEG）-4000为相变基，通过吸附-混合机制制备出不同PEG含量的多孔纤维素／PEG复合相变粉体材料（PCMs）。傅里叶变换红外光谱、扫描电子显微镜分析和复合相变粉体孔隙率测定结果表明，多孔纤维素与PEG能很好地相互结合；x射线衍射、差示扫描量热及热重分析结果表明，PCMs相变焓随PEG含量的增加而逐渐增加，PEG理论含量为50％（wt）时，多孔纤维素／PEG复合相变粉体相变焓值为95．53J/g。多孔纤维素／PEG复合相变粉体的热稳定性好。

英文摘要：

Using the prepared micro/nano porous cellulose （Cell） as skeleton and polyethyleneglycol （PEG-4000） as a phase change unit, the porous cellulose/PEG composite phase change powders （PCMs） with different content of PEG were prepared with the adsorption-mixedmechanism. With Fourier transform infrared （FTIR） spectroscopy, scanning electron microscopy （SEM）, porosity measurement of PCMs, the results show that the combination of PEG and Cellwas very good. By using of X-ray diffraction （XRD）, differential scanning calorimetry （DSC） and thermogravimetry analysis （TGA）, the phase change enthalpy of PCMs is increased with thecontent of PEG going up. Phase change enthalpy of PCMs is 95.53 J/g when PEG theoretical content is 50%. Thermal stability of PCMs is good.