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首页> 外文期刊>Journal of Applied Polymer Science >Investigation on jet stability, fiber diameter, and tensile properties of electrospun polyacrylonitrile nanofibrous yarns
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Investigation on jet stability, fiber diameter, and tensile properties of electrospun polyacrylonitrile nanofibrous yarns

机译：电纺聚丙烯腈纳米纤维纱的射流稳定性，纤维直径和拉伸性能的研究

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Electrospinning is a flexible and efficient method for producing nanofibers by using relatively dilute polymer solution. However, there are many parameters related to material and processing that influence the morphology and property of the nanofibers. This study investigates the influence of electric field and flow rate on diameter and tensile properties of nanofibers produced using polyacrylonitrile (PAN)-dimethylformamide (DMF) solution. Stability of the spinning jet is investigated via fiber current measurement and an image system at different electric fields and solution flow rates. It is observed that a set of electric field and flow rate conditions favor producing thinnest, strongest, and toughest nanofibers during electrospinning process. Other conditions may lead to instability of the Taylor cone, discontinuous jet, larger diameter fiber, and lower mechanical properties. Finally, a simple dynamic whipping model is adopted to correlate the nanofiber diameter with volumetric charge density and is found to be excellent validating our experimental results. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41918.
机译：电纺丝是通过使用相对稀的聚合物溶液生产纳米纤维的灵活而有效的方法。但是，有许多与材料和加工有关的参数会影响纳米纤维的形态和性能。这项研究调查了电场和流速对使用聚丙烯腈（PAN）-二甲基甲酰胺（DMF）溶液生产的纳米纤维的直径和拉伸性能的影响。通过在不同电场和溶液流速下的纤维电流测量和图像系统研究纺纱喷嘴的稳定性。观察到，一组电场和流速条件有利于在电纺丝过程中产生最薄，最坚固和最坚韧的纳米纤维。其他条件可能会导致泰勒锥不稳定，不连续射流，较大直径的纤维以及较低的机械性能。最后，采用简单的动态搅动模型将纳米纤维的直径与体积电荷密度相关联，发现该模型很好地验证了我们的实验结果。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41918。

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