以单硬脂酸甘油酯(GMS )为固液相变材料，以聚对苯二甲酸乙二酯(PET)纤维为支撑材料，通过静电纺丝方法成功制备了新型的 GMS/PET 定形相变复合纤维.FE-SEM观察显示随着定形相变复合纤维中 GMS 含量的增加，纤维直径逐渐增大且直径分布更广，纤维交叉点之间也出现粘连.XRD分析结果表明，静电纺丝过程中 GMS 和 PET 纤维基体能够很好地结合，由于PET纤维基体的支撑保护作用阻碍了GMS的结晶，导致结晶度下降. DSC 分析结果表明，静电纺GMS/PET定形相变复合纤维是一种相变过程完全可逆的储能材料，其相变焓值随着纤维中GMS含量的增加而逐渐增大，相变焓效率＞85％.在DSC热循环测试过程中定形相变复合纤维的相变温度和相变焓值几乎没有变化，表明了该材料具有良好的热循环稳定性.
An innovative type of glycerol monostearate/polyethylene terephthalate (GMS/PET)form-stable phase change composite fibers in which GMS acts as a solid-liquid phase change material and PET serves as a supporting material was successfully fabricated by electrospinning.The FE-SEM images revealed that the diam-eters of the form-stable phase change composite fibers gradually increased with the increasing GMS loading, whilst the wider diameter distribution and the adhesion among the composite fiber intersections could be also observed.The XRD patterns suggested that the GMS and PET exhibited good compatibility with each other and the crystallization degree of GMS in the fibers remarkably decreased resulting from the crystallization being hin-dered by the PET supporting skeleton.The DSC analysis showed that electrospun GMS/PET form-stable phase change composite fibers were a kind of transition reversible latent heat storage materials and the phase transition enthalpies of the composite fibers gradually increased with the increase of GMS contents.The efficiency of en-thalpies was larger than 85%.Moreover,the DSC thermal cycling test indicated that the phase change tempera-tures and enthalpies had almost no significant variation after the thermal cycling test,suggesting that electro-spun GMS/PET form-stable phase change composite fibers had good thermal reliability.
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