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为了解静电性能对电纺过程和产物的影响,以聚偏氟乙烯/N,N-二甲基甲酰胺溶液体系为试验对象,采用针板电极结构电纺装置在不同场强大小、不同电场极性和不同接收极材料的条件进行电纺,得到了具有蛛丝结构的纤维毡,纤维直径在75~250 nm之间,另外还研究了电纺聚偏氟乙烯纤维过程中的静电现象并讨论了静电性能对电纺聚偏氟乙烯纤维的影响。结果表明,电纺中聚偏氟乙烯射流会产生静电现象,积累净电荷,净电荷会随着外电场的增加而增加;射流在不同极性的电场中积累的净电荷不同,对纤维的形貌和直径有影响;净电荷的积累会对可纺性产生影响;场强较低的正极性电场有利于获得纤细、均匀的聚偏氟乙烯纤维;射流积累的净电荷需要通过接地装置导走,否则会影响电纺的正常进行。
In order to understand the influence of the electrostatic properties on the electrospinning process and the product, the polyvinylidene fluoride / N, N-dimethylformamide solution system was used as the test object, the needle plate electrode structure electrospinning device was used under different field strengths and different electric fields Polarity and different receiving electrode material conditions electrospinning, obtained with a spider silk structure of the fiber mat, fiber diameter between 75 ~ 250 nm, in addition to the electrospinning polyvinylidene fluoride fibers in the process of electrostatic phenomena and The effect of electrostatic properties on electrospun polyvinylidene fluoride fibers was discussed. The results show that the electrospinning poly (vinylidene fluoride) jet produces electrostatic phenomena and accumulates net charge. The net charge increases with the increase of the external electric field. The net charge accumulated by the jet in different polar electric fields is different. Appearance and diameter influence; the accumulation of net charge will have an impact on the spinnability; field strength lower positive electric field is conducive to obtain slender, uniform polyvinylidene fluoride fibers; jet net accumulation of charge need to be guided through the grounding device , Otherwise it will affect the normal progress of electrospinning.