具有保温性能的电纺LA/PET纳米纤维复合织物的制备与表征

本文制备了电纺月桂酸(LA)/聚对苯二甲酸乙二醇酯(PET)纳米纤维/机织物的复合织物,并对其进行了表征.选用纯棉纱线、毛纱线、涤棉纱线、腈纶纱线和涤纶纱线分别作为经纬纱线,在实验室制备机织物小样,同时,通过静电纺丝法制备LA/PET纳米纤维,将LA包裹在PET基材之中.之后通过缝合的方式,将电纺LA/PET纳米纤维和机织物构造成三明治结构的复合织物.对纳米纤维的形貌和热性能进行了表征,并分别探究了LA/PET的质量比,机织物组织结构和机织物材料对复合织物保温性能的影响.结果表明:LA/PET纳米纤维呈圆柱形,具有光滑表面,LA和PET展现出良好的相容性,热焓值略低于理论值,但相变温度改变不大.复合织物的热保温性能测试表明,复合织物的保温性能都优于未加入相变材料的织物,同时展现出良好的热循环稳定性.

Preparation and Characterization of Electrospun Lauric Acid/polyethylene Terephthalate Nanofibers/Woven Composite Fabrics with Heat Preserved Property

This work was focused on preparation and characterization of the electrospun lauric acid (LA)/polyethylene terephthalate (PET) nanofibers/woven composite fabrics.Composite fabrics consisting of electrospun LA/PET nanofibers and woven fabrics were prepared by quilting a sandwich structure.Cotton yarns,wool yarns,polyester-cotton yarns,acrylic yarns and polyester yarns were selected to prepare the woven fabrics in laboratory,respectively.Meanwhile,nanofibers with fatty acids of LA encapsulated in supporting matrices of PET were prepared through electrospinning technique.Morphological structures of the nanofibers were characterized by scanning electron microscope (SEM),and their thermal energy storage properties were investigated by the differential scanning calorimeter (DSC).In addition,the relationships between heat preserved properties of the composite fabrics and LA/PET mass ratios,woven structures and woven materials were discussed,respectively.The results showed that the LA/PET nanofibers possessed smooth and cylindrical morphological structure,LA and PET had good miscibility in those nanofibers.Enthalpy values associated with melting and crystallization for LA encapsulated in nanofibers were lower than corresponding theoretical values,but it had no appreciable effect on the phase change temperatures.Heat preserved property of composite fabric measurement suggested that all of those composite fabrics had much more insulation than the original one,meanwhile,the thermal cycling test indicated that they had a good thermal reliability.