建筑用多孔型相变储热材料的制备及性能表征

Preparation and Characterization of Porous Phase Change Materials for Building

利用可膨胀石墨和聚乙二醇等原材料制备出建筑用多孔型相变储热材料,详细介绍了该储热材料的制备方法,并通过扫描电镜测试与氮气吸附法两项手段来表征可膨胀石墨的微观形貌与孔隙结构,并用DSC表征可膨胀石墨/聚乙二醇多孔型相变储热材料的储热性能。实验研究发现,可膨胀石墨对聚乙二醇具有较强的吸附性能,当聚乙二醇与可膨胀石墨的质量比例为9:1时,相变储热材料的相变潜热较为理想,且相变温度也处于人体舒适温度区间。

Porous phase change heat storage material for building was prepared by using expandable graphite and polyethylene glycol.The microstructure and pore structure of the expandable graphite were characterized by scanning electron microscopy(SEM)and nitrogen adsorption method,and the thermal storage properties of the expandable graphite/polyethylene glycol porous phase change materials were characterized by DSC.When the mass ratio of polyethylene glycol and expandable graphite is 9:1,the latent heat of phase change is ideal,and the phase change temperature is also in the comfortable temperature range of human body.