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Electrospun Teflon AF fibers for superhydrophobic membranes

Published online by Cambridge University Press:  31 January 2011

Raymond Scheffler ,
Nelson S. Bell  and
Wolfgang Sigmund
Raymond Scheffler
Affiliation:
University of Florida, Department of Materials Science and Engineering, Gainesville, Florida 32611
Nelson S. Bell
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87123
Wolfgang Sigmund*
Affiliation:
University of Florida, Department of Materials Science and Engineering, Gainesville, Florida 32611
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Superhydrophobic membranes have the potential to protect devices from incidental exposure to water. This paper reports on the processing of Teflon AF fluoropolymers through electrospinning. Teflon AF is difficult to electrospin due to its low dielectric constant and the low dielectric constants of the liquids in which it is soluble. The two approaches that have been utilized to produce fibers are direct electrospinning in Novec engineering liquids and core-shell electrospinning. Both methods produced superhydrophobic membranes. Fibers with an average diameter of 290 nm and average water contact angle of 151° were obtained by core-shell electrospinning. One suggested application for electrospun superhydrophobic membranes is the lithium-air battery.

Keywords

FNanostructurePolymer
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 8: Materials for Electrical Energy Storage , August 2010 , pp. 1595 - 1600
Copyright
Copyright © Materials Research Society 2010

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