Effect of solvent evaporation on fiber morphology in rotary jet spinning.
Effect of solvent evaporation on fiber morphology in rotary jet spinning.
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DOI：
10.1021/la5023104
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发表时间：
2014-11-11
期刊：
影响因子：
--
通讯作者：
Parker KK
中科院分区：
文献类型：
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作者：
Golecki HM;Yuan H;Glavin C;Potter B;Badrossamay MR;Goss JA;Phillips MD;Parker KK
聚合物纳米纤维的批量生产对于制造高性能的纳米级材料非常重要。旋转喷射纺丝（RJS）可以利用离心力大规模生产纳米结构纤维，但可能导致表面形貌不一致。由于纳米纤维的性能取决于其表面特征，因此我们提出了在生产过程中必须优化哪些参数以控制纤维形态的问题。我们开发并测试了一个数学模型，该模型描述了RJS中流体不稳定性和溶剂去除之间的竞争如何调节纤维的起球程度。我们的数据表明，纺丝过程中的溶剂蒸发导致喷射粘度增加，这些变化抑制了珠粒的形成和喷射变薄。采用RJS改变实验参数表明，增加溶剂挥发性、溶液粘度和纺丝速度可以减少纤维起球。总的来说，我们的研究结果表明，纳米纤维的形态和直径可以在RJS制造过程中精确控制。
The bulk production of polymeric nanofibers is important for fabricating high performance, nano-scale materials. Rotary Jet-Spinning (RJS) enables the mass production of nanostructured fibers by centrifugal forces but may result in inconsistent surface morphologies. Because nanofiber performance is dependent on its surface features, we asked which parameters must be optimized during production to control fiber morphology. We developed and tested a mathematical model that describes how the competition between fluid instability and solvent removal in RJS regulates the degree of beading in fibers. Our data suggests that solvent evaporation during the spinning process causes an increase in jet viscosity and that these changes inhibit both bead formation and jet thinning. The RJS was used to vary experimental parameters showing that fiber beading can be reduced by increasing solvent volatility, solution viscosity, and spinning velocity. Collectively, our results demonstrate that nanofiber morphology and diameter can be precisely controlled during RJS manufacturing.