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- Title
Conjugate electrospinning of aligned polymer nanofibers at different intersection angles between the oppositely charged spinning nozzles.
- Authors
Song, Xiaolei; Lin, Haoyu; Wu, Xiao; Wu, Xingyu; Song, Ying; Duan, Zhenxin; Wang, Hongli
- Abstract
Conjugate electrospinning, with two oppositely placed and charged spinning nozzles, is a modified electrospinning technique to prepare continuous nanofibers with the aligned structure. In the present work, conjugate electrospinning is used to prepare highly aligned polyvinyl pyrrolidone (PVP) nanofibers. The influences of an unheeded parameter, the intersection angle between the oppositely charged spinning nozzles, on the morphology and alignment of the polymer nanofibers are investigated. It is found that the alignment degree of the nanofibers increases first and decreases then when the intersection angle increases from 60 to 240°, reaching the best alignment at the angle of 120°. The main reason is that the swing fibers on the same side entangle together when the intersection angles are small, and those mutually attracted ones from the opposite side also entangle at high intersection angles. Raising the collecting rate can improve the alignment degree of the PVP nanofibers. The critical collecting rate (beyond which the collecting fibers will fracture) increases at higher intersection angle. Though the fibers prepared at 240° are collected at a higher rate, their alignment degree is still worse that of the fibers spun at 120°. In summary, to acquire well-aligned nanofibers by conjugate electrospinning, an appropriate intersection angle between the oppositely charged spinning nozzles should not be neglected.
- Subjects
POLYMERIZATION; NOZZLES; ELECTROSPINNING; PYRROLIDINONES; FIBERS
- Publication
Journal of Nanoparticle Research, 2024, Vol 26, Issue 7, p1
- ISSN
1388-0764
- Publication type
Article
- DOI
10.1007/s11051-024-06083-3