氯化锂对静电纺聚丙烯腈纳米纤维结构的影响

Effect of LiCl on the structure of electrospun polyacrylonitrile nanofibers

静电纺丝是用聚合物溶液或熔体制取纳米纤维的简易方法。当溶液完全绝缘或施加电压不够高时,静电力无法克服表明张力,纤维纺不出来。溶液中加盐后,就能克服这个问题。添加不同质量分数LiCl的聚丙烯腈纺丝液纺得纳米纤维的直径从大到小排列为:4%LiCl>3%LiCl>2%LiCl>1%LiCl。对纺得的纳米纤维内部结构采用X射线衍射和红外光谱法进行分析,发现加盐有利于静电纺丝且不会影响纳米纤维的内部结构。

Electrospinning is a relatively simple method to produce nanofibers from polymers ,and polymer solutions or melt. If the solution is insulating completely, or the applied voltage is not high enough so that electrostatic force cannot overcome the surface tension, no fiber can be produced by electrospinning. However, if some salt is added in the solution, the problem can be overcome. The diameter of nanofibers electrospun with polyacrylonitrile（PAN） solutions with different mass percentage of LiCl ranges from large to small： 4% LiCl〉 3% LiCl 〉 2% LiCl 〉 1% LiCl. Characterization of the microstructure of the electrospun：fibers was performed by X-ray diffraction and infrared spectrum. The added salts are beneficial for electrospinning and won＇t change the structure of PAN nanofibers.