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Chin. Phys. B, 2016, Vol. 25(7): 078106    DOI: 10.1088/1674-1056/25/7/078106

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

Xu Yan(闫旭)1, Miao Yu(于淼)1,2, Wen-Peng Han(韩文鹏)1, Ming-Hao You(犹明浩)1, Jun-Cheng Zhang(张君诚)1, Rui-Hua Dong(董瑞华)1, Hong-Di Zhang(张红娣)1, Yun-Ze Long(龙云泽)1,3
1 Collaborative Innovation Center for Low-Dimensional Nanomaterials & Optoelectronic Devices, College of Physics, Qingdao University, Qingdao 266071, China;
2 Department of Mechanical Engineering, Columbia University, New York 10027, USA;
3 Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, State Key Laboratory Cultivation Base of New Fiber Materials and Modern Textile, Qingdao University, Qingdao 266071, China
Abstract  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.
Keywords:  electrospinning      nail collector      closed-loop fiber      Coulomb repulsion  
Received:  03 December 2015      Revised:  06 April 2016      Published:  05 July 2016
PACS:  81.07.-b (Nanoscale materials and structures: fabrication and characterization)  
  61.46.-w (Structure of nanoscale materials)  
  81.05.Lg (Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51373082 and 11404181), the Taishan Scholars Program of Shandong Province, China (Grant No. ts20120528), and the Postdoctoral Scientific Research Foundation of Qingdao City, China.{These two authors contributed equally to this work.
Corresponding Authors:  Yun-Ze Long     E-mail:

Cite this article: 

Xu Yan(闫旭), Miao Yu(于淼), Wen-Peng Han(韩文鹏), Ming-Hao You(犹明浩), Jun-Cheng Zhang(张君诚), Rui-Hua Dong(董瑞华), Hong-Di Zhang(张红娣), Yun-Ze Long(龙云泽) Fabrication and formation mechanism of closed-loop fibers by electrospinning with a tip collector 2016 Chin. Phys. B 25 078106

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