Physical Sciences Inc. Publications Abstract: A nonlinear system model for electrospinning sub-100 nm polyacrylonitrile fibers

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Abstract: A nonlinear system model for electrospinning sub-100 nm polyacrylonitrile fibers

M.A. Costolo, J.D. Lennhoff, R. Pawle, E.A. Rietman, A.E. Stevens, "A nonlinear system model for electrospinning sub-100 nm polyacrylonitrile fibers ," Nanotechnology 19 , 035707 (13 December2007).

Institute of Physics (the “Institute”) and IOP Publishing Limited (IOPP) 2007

Abstract

Solutions of polyacrylonitrile (PAN) were electrospun using a range of process parameters, resulting in fibre diameters from 10-320nm. A nonlinear neural network system model was used to analyze the dependence of the fibre diameter on the process parameters, and used to simulate conditions for electrospinning 40-60nm diameter fibres. These results indicated that flow rate is most important for determining fibre diameter. It was not possible to find appropriate conditions for electrospinning sub-25nm fibres. Precise control of the ambient temperature and relative humidity will be critical to producing electrospun fibres that are sub-25nm. Further, it is unlikely that sub-25nm fibres will be produced without significant changes in the electrospinning apparatus, for example, by use of focusing and jet-steering fields, alternate carrier gases to modify the discharge characteristics, or patterned electrospinning.

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