海绵状氧化石墨烯/聚乙二醇单甲醚相变材料的制备及性能

以海绵状氧化石墨烯(spongy graphene oxide,SG)为载体材料,聚乙二醇单甲醚(methoxy polyethylene glycol,MPEG)为相变物质,通过物理浸渍法制备了定形相变材料。采用X射线衍射、傅里叶变换红外光谱、差示扫描量热法、热失重和热台等方法对定形相变材料的结构、相变性能、热稳定性和定形能力进行表征和分析。结果表明,当SG质量分数为8%时,样品焓值最大且定形效果最好,结晶温度和熔融温度分别为18.7和30.7℃,焓值达到140.3 J/g,当温度达到250℃时,无任何泄漏发生,且热稳定性良好。该定形相变材料有望在聚丙烯相变纤维中实现应用。

Phase Change Materials Synthesis and Characterization by Spongy Graphene Oxide/Methoxy Polyethylene Glycol

A shape stabilized phase change material was prepared by physical blending and impregnation method by using spongy graphene oxide(SG)as carrier material while methoxy polyethylene glycol(MPEG)as phase change material.The structure and morphology of the composite were characterized by X-ray diffraction and Fourier transform infrared spectroscopy,while thermal properties were obtained by differential scanning calorimeter and thermo gravimetric analysis techniques.Shape stabilized properties of the composite were examined by a heating stage.The results indicate that when the addition of spongy graphene oxide is 8%,the crystallization and melting temperatures of the composite are 18.7 and 30.7℃respectively.The composite exhibited a high heat storage capacity of 140.3 J/g with better shape stabilized property and good thermal stability when the temperature reached 250℃.Thus the shape stabilized phase change material is expected to achieve application in polypropylene phase change fibers.