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纤维素基储能调温超细纤维的制备

期刊名称：高分子通报
时间：0
页码：1376-1398
语言：中文
分类：TQ342.93[化学工程—化纤工业]
作者机构：[1]南阳师范学院化学与制药工程学院,南阳473061, [2]英国谢菲尔德大学生物医学系,谢菲尔德S102TN, [3]中国科学院化学研究所,高分子化学与物理国家重点实验室,北京100080, [4]中国科学院广州化学研究所,纤维素重点实验室,广州510650
相关基金：国家自然科学基金（No.50521302）; 广东省自然科学基金（No.07006836）
相关项目：高分子材料多层次结构及结构调控

关键词：静电纺丝, 储能调温, 超细纤维, 形态, 热学性能, Electrospinning, Thermoregulation, Ultrafine fibers, Morphology, Thermal properties

中文摘要：

使用静电纺丝法制备了以醋酸纤维素（CA）为载体基质,聚乙二醇（PEG）为相变材料的新型PEG/CA储能调温超细复合纤维,研究了纺丝溶液中不同PEG含量和分子量对复合纤维的形态和热学性能的影响。结果发现复合纤维的形态一般呈表面光滑的圆柱状,其平均直径随着PEG含量和分子量的增加而增大,PEG随机分布在复合纤维中的内部和表面。热学分析发现当改变纤维中PEG的含量时,复合纤维的相变温度变化不大,而相变焓则与之成正比变化;当改变纤维中PEG分子量时,复合纤维的相变温度和相变焓均随之而改变。通过多次热循环测试发现复合纤维的热学性能均无太大变化,表明所得复合纤维具有良好的耐热性能和稳定性能。通过模拟测试发现,所制得的PEG/CA复合纤维具有良好的蓄热调温特性。因此,PEG/CA储能调温超细复合纤维具有很好的应用前景。

英文摘要：

Ultrafine fibers of polyethylene glycol/cellulose acetate （PEG/CA） composite in which PEG acts as a model phase change material （PCM） and CA acts as a supporting material,were successfully prepared via electrospinning as thermoregulating materials .The effect of PEG content and its molecular weight on morphology and thermal properties of the PEG/CA composite fibers was studied. The morphology observation from the composite fibers revealed that the fibers were cylindrical and had a smooth external surface,and the average diameter of the composite fibers increases with the increase of PEG content and its molecular weight. PEG was found to be both distributed on the surface and within the core of the fibers. The results from thermal properties indicated that the enthalpies of the composite fibers increase with the increase of PEG content,but the phase transition temperature of those varied slightly;and both the enthalpies and phase transition temperature of the fibers varied with the PEG molecular weight. The thermal performances of the composite fibers were reproducible after thermal cycles,which indicated that the composite fibers have good thermal stability and reliability. Meanwhile,the composite fibers have anticipant thermoregulating function from the simulate test. Therefore,the electrospun PEG/CA composite fibers are promising in serving as thermoregulating materials.