Aligned polymer fibers produced via an additive electric field

doi:10.1007/s11458-011-0226-9

Front Chem Chin

2011, Vol. 6

Issue (1) : 44-47 https://doi.org/10.1007/s11458-011-0226-9

RESEARCH ARTICLE

Aligned polymer fibers produced via an additive electric field

Yufei AI, Hongpeng ZHEN, Jun NIE, Dongzhi YANG(

)

Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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Abstract

Electrospinning is known to be a highly versatile method to produce nanofibers, and several techniques have been developed to align nanofibers. In this paper, poly(vinyl alcohol) (PVA), poly(vinylpyrrolidone) (PVP), poly(propylene carbonate) (PC), poly(ethylene oxide) (PEO), PVA/Chitosan and PVA/Fe₃O₄ uniaxially aligned ultrafine fibers were obtained with electrospinning method by adding another electric field in the collection area. Alignment of the nanofibers was characterized by the use of digital cameras and field emission scanning electron microscopy, polarized Fourier transform infrared spectroscopy (FTIR), and wide-angle X-ray diffraction (XRD). The mechanism of fiber alignment was investigated as well.

Keywords align electrospinning electrostatic field orientation

Corresponding Author(s): YANG Dongzhi,Email:yangdz@mail.buct.edu.cn

Issue Date: 05 March 2011

Cite this article:

Yufei AI,Hongpeng ZHEN,Jun NIE, et al. Aligned polymer fibers produced via an additive electric field[J]. Front Chem Chin, 2011, 6(1): 44-47.

URL:

https://academic.hep.com.cn/fcc/EN/10.1007/s11458-011-0226-9
https://academic.hep.com.cn/fcc/EN/Y2011/V6/I1/44

Fig.1 (a) Schematic illustration of the setup for electrospinning. The collector contained two pieces of metallic flats with a 10 cm gap; (b) electric force analysis of a charged nanofiber spanning across the gap
F1: electrostatic force between positive metallic flat (DC+) and negative metallic flat (DC-); F2: electrostatic force of electrospinning.

Tab.1 Electrospinning parameters

Fig.2 SEM image of uniaxially aligned nano-micro fibers made by various materials: The insets showed enlarged SEM images of these fibers. (a) 7.5 wt% Chitosan/PVA (9/1 w/w) blend solution; (b) 10 wt% PVA with 30 wt% FeO water solution; (c) 50 wt% PVP water solution; (d) 10 wt% PC chloroform solution; (e) 4 wt% PEO solution (solvent: ethanol/water, 2/3); (f) array of crossbar junctions constructed by sequentially transferring the collected electric field of PVA nanofibers

Fig.3 Polarized FTIR spectra of aligned PEO nanofibers 0° (and 90°) means that polarized radiation is parallel with (perpendicular to) the fiber direction. For aligned PEO nanofibers, the peak intensities of 0° are greater than those for 90°.

Fig.4 XRD patterns of PEO powder (1), oriented nanofiber (2) and nonwoven mat nanofiber (3)

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