静电和熔融纺丝法对PET纤维表面结构的影响

Effects of electrospinning and melt spinning on surface structure of PET fibers

采用扫描电子显微镜(SEM)、原子力显微镜(AFM)和差示扫描量热仪(DSC)对溶液和熔融静电纺丝法所制备的PET纤维,以及工业熔融纺PET纤维的表面形貌和热学性能进行分析比较。结果表明,因加工成纤方式不同,熔融静电纺纤维表面光滑匀整,工业熔融纺纤维表面有明显的凹凸波浪纹,而溶液静电纺纤维表面略显蜂窝状结构。由DSC分析可知,不同纺丝方法对纤维玻璃化温度、结晶温度、熔融温度的影响不大,但实验室制备熔融静电纺纤维的结晶度和结晶的完整性较工业熔融纺纤维低,而溶液静电纺纤维晶态结构大部分处于无定形状态。

Surface morphology and thermodynamic performances of solution and melt electrospun PET fibers and industrial melt spun PET fibers were characterized by scanning electron microscopy（SEM）,atomic force microscope（AFM） and differential scanning calorimetry（DSC）.The results indicated that surface morphology of the products varies with processing methods.The melt electrospun fiber has a smooth and even surface,while distinct concave-convex watering is observed on the surface of industrial melt spun fiber,and the solution electrospun fiber displays a slight cellular structure on it surface.It is found by DSC analysis that different spinning methods have little effects on the glass transition temperature,crystallization temperature and melting temperature of the fibers.However,the crystallinity and crystal integrality of melt electrospun fiber made in laboratory were lower than those of the fiber made in factory,whereas the crystalline structure of the solution electrospun fiber mostly exhibits an amorphous one.