摘要
通过静电纺丝方法成功制备了新型的月桂酸-硬脂酸(LA-SA)/聚对苯二甲酸乙二酯(PET)定形相变复合纤维。场发射扫描电子显微镜(FE-SEM)观察结果显示,随着LA-SA含量的增加,纤维表面的褶皱越来越明显,且纤维直径逐渐增大。差示扫描量热(DSC)分析结果显示,随着LA-SA在纤维中比例的增大,复合纤维的相变温度变化不大,相变焓值逐渐增加。DSC热循环测试结果表明,静电纺LA-SA/PET复合相变纤维是一种相变过程完全可逆的定形相变材料,可以在环境中循环使用。热重(TGA)分析结果表明,LA-SA/PET复合相变纤维分别在135℃～240℃和325℃～500℃温度范围内发生热降解,在相变温度范围(<100℃)内具有良好的热稳定性。
The form-stable phase change composite fibers consisting of binary lauric-stearic acid （LA-SA） eutectic and polyethylene terephthalate （PET） were successfully fabricated by electrospunning. The field-emission scanning electron microscopy （FE-SEM） images show that the wrinkles on the surface of the phase change composite fibers become more and more obvious, whilst the diameters of the composite fibers gradual increase with the amount of LA- SA eutectic increasing. The DSC analysis indicates that the phase transition temperatures of the composite fibers almost do not have the significant variation, while their enthalpies gradually increase with LA-SA eutectic content increasing. Moreover, the DSC thermal cycling test suggests that the thermal properties of the LA-SA/PET composite fibers can well be maintained after repeated thermal cycle treatment. The TGA results reveal that there are two-step thermal degradation processes for the LA-SA/PET composite fibers at 135℃ --240℃ and 325 ℃ --500 ℃, indicating the composite fibers have good thermal reliability during the phase change temperatures.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第2期155-158,共4页
Polymer Materials Science & Engineering
基金
国家高技术研究发展计划(863)资助项目(2012AA030313)
国家自然科学基金资助项目(51006046)
教育部长江学者和创新团队发展计划(IRT1135)
江苏高校优势学科建设工程资助项目
江苏省普通高校研究生科研创新计划(CXZZ12-0747)
关键词
静电纺丝
复合相变纤维
月桂酸
硬脂酸低共熔物
形貌
储热性能
热稳定性
electrospinning
composite phase change fibers
LA-SA eutectic
morphology
thermal energy storage
thermal stability
作者简介
通讯联系人：魏取福，主要从事功能纺织材料研究，E-mail：qfwei@jiangnan．edu.cn
