Fabrication and formation mechanism of closed-loop fibers by electrospinning with a tip collector

• 作者: 于淼 张君诚 张红娣 犹明浩 董瑞华 闫旭 韩文鹏 龙云泽
• 来源期刊: 中国物理B（英文版）
• 关键词: electrospinning nail collector closed-loop fiber Coulomb repulsion
• 年，卷（期）: 2016,（7）
• 页码范围: 078106-1-078106-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/25/7/078106

摘要

Electrospun nanofibers with designed or controlled structures have drawn much attention. In this study, we report an interesting new closed-loop structure in individual cerium nitrate/polyvinyl alcohol (Ce(NO3)3/PVA) and NaCl/PVA fibers, which are fabricated by electrospinning with a nail collector. The electrospinning parameters such as voltage and Ce(NO3)3 (or NaCl) concentration are examined for the formation of the closed-loop structure. The results suggest that the increase of the spinning voltage or addition of Ce(NO3)3 (or NaCl) is favorable for the formation of the closed-loop structure, and the increase of loop numbers and the decrease of loop size. Further analyses indicate that the formation mechanism of the closed-loop fibers can be predominantly attributed to the Coulomb repulsion in the charged jets.