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Micro helical polymeric structures produced by variable voltage direct electrospinning
, Article Soft Matter ; Volume 7, Issue 22 , 2011 , Pages 10548-10551 ; 1744683X (ISSN) ; Iraji Zad, A ; Abdollahzadeh, I ; Shirsavar, R ; Bonn, D ; Ejtehadi, R ; Sharif University of Technology
2011
Abstract
Direct near field electrospinning is used to produce very long helical polystyrene microfibers in water. The pitch length of helices can be controlled by changing the applied voltage, allowing the production of both microsprings and microchannels. Using a novel high frequency variable voltage electrospinning method we determined the helix formation speed and compared the experimental buckling frequency to theoretical expressions for viscous and elastic buckling. Finally we showed that the new method can be used to produce new periodic micro and nano structures