Holec Pavel, Jirkovec Radek, Kalous Tomáš, Baťka Ondřej, Brožek Jiří, Chvojka Jiří
Department of Nonwovens and Nanofibrous Materials, Faculty of Textile Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic.
Department of Textile Machines, Faculty of Mechanical Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic.
Nanomaterials (Basel). 2022 Feb 16;12(4):665. doi: 10.3390/nano12040665.
The paper provides a description of the potential for the direct current- and alternating current-driven electrospinning of various linear aliphatic polyamides (PA). Sets with increasing concentrations of selected PAs were dissolved in a mixture of formic acid and dichloromethane at a weight ratio of 1:1 and spun using a bar electrode applying direct and alternating high voltage. The solubility and spinnability of the polyamides were investigated and scanning electron microscopy (SEM) images were acquired of the resulting nanofiber layers. The various defects of the spun fibers and their diameters were detected and subsequently measured. Moreover, the dynamic viscosity and conductivity were also subjected to detailed investigation. The most suitable concentrations for each of the PAs were determined according to previous findings, and the solutions were spun using a Nanospider device at the larger scale. The fiber diameters of these samples were also measured. Finally, the surface energy of the fiber layers produced by the Nanospider device was measured aimed at selecting a suitable PA for a particular application.
本文描述了各种线性脂肪族聚酰胺（PA）在直流和交流驱动下进行静电纺丝的可能性。将选定PA浓度不断增加的几组样品溶解在甲酸和二氯甲烷重量比为1:1的混合物中，并使用施加直流和交流高压的棒状电极进行纺丝。研究了聚酰胺的溶解性和可纺性，并获取了所得纳米纤维层的扫描电子显微镜（SEM）图像。检测并随后测量了纺丝纤维的各种缺陷及其直径。此外，还对动态粘度和电导率进行了详细研究。根据先前的研究结果确定了每种PA的最合适浓度，并使用Nanospider设备在更大规模上对溶液进行纺丝。还测量了这些样品的纤维直径。最后，测量了由Nanospider设备生产的纤维层的表面能，旨在为特定应用选择合适的PA。
