Peer Petra, Zelenkova Jana, Filip Petr, Lovecka Lenka
Institute of Hydrodynamics, Czech Academy of Sciences, 166 12 Prague, Czech Republic.
Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, 760 01 Zlin, Czech Republic.
Polymers (Basel). 2021 Jan 14;13(2):265. doi: 10.3390/polym13020265.
Electrospinning represents the very effective process of producing nanofibrous mats. This process is influenced by a number of mutually and strongly interlaced entry parameters (characteristics of polymer, solvent, process parameters) and their participation in the resulting nanofiber quality. The appearance of nanofibers is a result of the necessary primary experimental parameter setting within an acceptable range. However, finer analysis of nanofiber quality depends on the proper choice of these individual factors. The aim of this contribution is to evaluate one of the key factors-polymer concentration-with respect to the presence or absence of bead formation. This passage can be approximated by rheological oscillatory measurements when a sudden decrease in phase angle indicates this change. It replaces otherwise time- and cost-consuming trial-and-error experiments. This approach was tested using three different materials: solutions of poly(vinylidene fluoride--hexafluoropropylene), poly(vinyl butyral), and poly(ethylene oxide).
静电纺丝是生产纳米纤维毡非常有效的方法。这个过程受到许多相互交织且紧密关联的输入参数（聚合物特性、溶剂、工艺参数）的影响，以及它们对最终纳米纤维质量的作用。纳米纤维的形成是在可接受范围内设置必要的初始实验参数的结果。然而，对纳米纤维质量的更精细分析取决于对这些单个因素的正确选择。本论文的目的是评估关键因素之一——聚合物浓度——与珠状物形成与否的关系。当相角突然减小时，这种关系可用流变振荡测量来近似。这取代了原本既耗时又费钱的试错实验。使用三种不同材料对这种方法进行了测试：聚（偏二氟乙烯 - 六氟丙烯）溶液、聚乙烯醇缩丁醛和聚环氧乙烷。
