Experimental and theoretical investigation of the fluid behavior during polymeric fiber formation with and without pressure
Experimental and theoretical investigation of the fluid behavior during polymeric fiber formation with and without pressure
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DOI：
10.1063/1.5110965
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发表时间：
2019-12-01
影响因子：
15
通讯作者：
Edirisinghe, Mohan
中科院分区：
文献类型：
--
作者：
Alenezi, Hussain;Cam, Muhammet Emin;Edirisinghe, Mohan
聚合物微/纳米纤维的制造由于其在包括组织工程支架、纳米传感器和纤维增强复合材料的一系列应用中的使用而受到关注。尽管聚合物纤维具有多用途的性质，但由于缺乏可靠的大规模生产技术，聚合物纤维被广泛利用不足。随着离心纺纱技术的发现和最近的加压回转技术的发现，新的研究方向出现了。在这里，我们报告了一项全面的研究，详细介绍了最佳条件，以显着提高不同直径的纤维的形态，均匀性和产量。使用21重量%的聚乙烯醇制备一系列聚合物纤维。在蒸馏水中的聚环氧乙烷溶液中，并且使用高速照相机在透明储液器内监测流体行为。纤维的制造花费少于1秒。使用离心纺丝，我们研究了在三种不同的转速下纤维的形成，并且对于加压回转，研究了一种转速与三种不同的氮气压力。在0.3MPa的气体压力下使用加压回转技术，纤维的生产产率显著提高。我们发现压力的变化和溶液离开储层的速率与纤维形态的改善之间存在很强的相关性。使用降低功率的技术，如离心纺丝和加压回转，以大量生产高质量的非织造纳米纤维和微纤维是重要的，因为它们在迅速扩大的市场中使用。(C)2019年作者。
The fabrication of polymeric micro/nanofibers is gaining attention due to their use in an array of applications including tissue engineering scaffolds, nanosensors, and fiber-reinforced composites. Despite their versatile nature, polymeric fibers are widely underutilized due to the lack of reliable, large-scale production techniques. Upon the discovery of centrifugal spinning and, recently, pressurized gyration techniques, new research directions have emerged. Here, we report a comprehensive study detailing the optimal conditions to significantly improve the morphology, homogeneity, and yield of fibers of varying diameters. A series of polymeric fibers was created using a 21 wt.% solution of polyethylene oxide in distilled water and the fluid behavior was monitored inside a transparent reservoir using a high-speed camera. Fabrication of the fibers took less than 1 s. Using centrifugal spinning, we studied the formation of the fibers at three different rotational speeds, and for pressurized gyration, one rotational speed was studied with three different nitrogen gas pressures. Using the pressurized gyration technique at a gas pressure of 0.3 MPa, there was significant improvement in the production yield of the fibers. We found a strong correlation between the variation of pressure and the rate of the solution leaving the reservoir with the improved morphology of the fibers. The use of reduced power techniques, like centrifugal spinning and pressured gyration, to yield high-quality nonwoven nanofibers and microfibers in large quantities is important due to their use in rapidly expanding markets. (C) 2019 Author(s).