Composite fibrous mats of polyacrylonitrile (PAN) and binary mixture of polyethylene glycol (PEG) 1000 plus PEG 2000 (1:1) have been fabricated using electrospinning. Phase change temperature range of PEG mixture is 24-33°C (cooling cycle) and 42-55°C (heating cycle), and corresponding enthalpy is 155J/g and 182J/g. The effects of PEG1000/2000 mass content on the morphology, thermal properties, structure of the produced composite fibres have been investigated thoroughly by scanning electron microscopy, differential scanning calorimetry, thermal gravimetric, fourier transform infrared spectroscopy and X-ray diffractometer. The experimental results show the preparation of three-dimensional nanofibrous mats. The fibre diameter varies with the PEG content. The latent heat enthalpy of the composite fibres increases with the increase in PEG blends content during cooling and heating cycles. Phase change temperature shows little difference between pure PEG and composite fibres. The obtained results also show that the super fine porous PAN mats can act as polymeric matrix of PEG1000/2000 and thus prevent the leakage of PEG1000/2000 during phase transition. PAN/PEG1000/2000 has potential to be a form-stable phase change material.

中文翻译：

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电纺PAN / PEG1000 / 2000复合纤维的制备与表征

聚丙烯腈（PAN）和聚乙二醇（PEG）1000加PEG 2000（1：1）的二元混合物的复合纤维毡已经使用静电纺丝制造。PEG混合物的相变温度范围为24-33℃（冷却循环）和42-55℃（加热循环），并且相应的焓为155J / g和182J / g。通过扫描电子显微镜，差示扫描量热法，热重分析，傅立叶变换红外光谱和X射线衍射仪，深入研究了PEG1000 / 2000质量分数对所形成复合纤维的形态，热性能，结构的影响。实验结果表明，制备了三维纳米纤维毡。纤维直径随PEG含量而变化。在冷却和加热周期中，复合纤维的潜热焓随着PEG共混物含量的增加而增加。相变温度显示纯PEG和复合纤维之间几乎没有差异。所获得的结果还表明，超细多孔PAN垫可以充当PEG1000 / 2000的聚合物基质，从而防止在相变期间PEG1000 / 2000的泄漏。PAN / PEG1000 / 2000有可能成为形状稳定的相变材料。