动态线性电极静电纺PVA纳米纤维的可纺性

The Spinnability Study of the Dynamic Linear Electrode ElectrospunPVA Nanofibers

中文关键词: 聚乙烯醇可纺性 静电纺丝 线性电极 纤维形貌 直径

英文关键词: PVA spinnability, electrospinning, linear electrode, fiber morphology, diameter

中文摘要:

      为了解决传统针式静电纺针头易堵塞不易产业化的问题,采用铜丝动态线性电极静电纺丝技术对PVA纳米纤维的可纺性进行研究。利用扫描电子显微镜研究了PVA溶液浓度、电压和纺丝距离对PVA纤维形貌及直径分布的影响。结果表明:随PVA溶液浓度降低,溶液粘度和电导率减小,纤维直径及其分布变小。且随纺丝距离增大,纤维直径变细,纤维形貌变好。当PVA浓度为10%(质量分数),电压80 kV,距离30 cm时,可制备出形貌良好的纳米纤维,其直径为433 nm,产量高达 6.8 g/h ；当PVA浓度为5%(质量分数),电压80 kV,距离30 cm, 可纺最细纤维直径为96 nm。本研究可为未来PVA静电纺纳米纤维膜的规模化制备提供参考。

英文摘要:

      In order to solve the problem of needle blocking and hard industrialization of traditional needle-type electrospinning, the PVA nanofibers was spun by using the copper wire dynamic linear electrode electrospinning technique. The influences of PVA solution concentration, voltage and spinning distance on the morphology and diameter distribution of PVA nanofibers were studied by scanning electron microscopy (SEM). The results showed that, when PVA solution concentration decreased, solution viscosity and conductivity decreased, fiber diameter and its distribution became narrow. With the increase in spinning distance, the fiber diameter became smaller, and the fiber morphology became better. When the PVA concentration was 10wt%, the voltage was 80 kV and the distance was 30 cm, the nanofibers had good morphology, the diameter was 433 nm, and the yield reached 6.8 g/h. When the PVA concentration was 5wt%, the voltage was 80 kV, distance was 30 cm, the smallest diameter of spinning fibers reached 96 nm. This study can provide a reference for the future large-scale preparation of PVA electrospun nanofibers.