静电纺丝法制备聚甲醛纳米纤维

Polyoxymethylene Nanofibers by Electrospinning

以六氟异丙醇为溶剂,用静电纺丝的方法制备了聚甲醛纳米纤维.利用场发射扫描电镜对纤维形貌进行了表征,纤维的直径为0.3～1.2μm.讨论了溶液浓度、接收距离、电压和温度等纺丝参数对纤维形貌的影响.用DSC方法对电纺纤维膜的结晶性能进行了研究,并与溶液浇铸膜的进行了比较.结果表明,电纺纤维膜的熔点与溶液浇铸膜的相同,与溶液的浓度无关,但结晶度比溶液浇铸膜的低.力学性能用拉伸试验进行了测试,观察到很长的断裂伸长率.

Polyoxymethylene nanofibers were prepared by electrospinning with 1,1,1,3,3,3-hexafluoroisopro- panol as the solvents. The fiber morphology was observed by field emission scanning electron microscopy. The average fiber diameters range from 0.3μm to 1.2 μm. The effects of various parameters such as solution concentration, tip-to-collector distance, voltage and temperature on the morphology of the fibers were investigated. The crystalline properties of the electrospun mats were measured by DSC and compared with those of the solution-cast films. The electrospum mats have the same melting temperature, regardless of the solution concentration with the solution-cast film, but the electrospun mats have a lower degree of crystallinity. The mechanical properties were tested by tensile tests, and a very long elongation to break was observed.