College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China.
Macromol Rapid Commun. 2011 May 18;32(9-10):744-50. doi: 10.1002/marc.201100049. Epub 2011 Mar 24.
Based on a modified coaxial electrospinning process and suitable selection of solvent mixtures as sheath fluid, a new strategy is presented for systematically improving polymer nanofiber quality. A concentric spinneret with an indented inner capillary is designed for the modified coaxial electrospinning. With a solution of 12% w/v PVP K60 in ethanol as the core electrospinning fluid, six solvents are used as sheath fluids to investigate the impact of solvent properties on the resultant PVP nanofiber quality. The PVP nanofiber quality is closely related to solvent physical-chemical properties. High quality PVP nanofibers of average diameter 130 ±10 nm with homogeneous structures and smooth surfaces are created using a solvent mixture of acetone, ethanol and DMAc in the ratio of 3:1:1(v/v/v).
基于改进的同轴静电纺丝工艺和对鞘液溶剂混合物的合理选择，提出了一种系统改善聚合物纳米纤维质量的新策略。设计了一种具有内凹内毛细管的同心喷丝头，用于改进的同轴静电纺丝。以 12% w/v 的 PVP K60 在乙醇中的溶液作为芯射流纺丝液，使用六种溶剂作为鞘液，研究了溶剂性质对所得 PVP 纳米纤维质量的影响。PVP 纳米纤维的质量与溶剂的物理化学性质密切相关。使用丙酮、乙醇和 DMAc 的比例为 3:1:1（v/v/v）的溶剂混合物，可以制备出平均直径为 130±10nm、结构均匀、表面光滑的高质量 PVP 纳米纤维。
