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Superhydrophobic polymeric coatings produced by rapid expansion of supercritical solutions combined with electrostatic deposition (RESS-ED)

Ovaskainen, Louise; Chigome, Samuel; Birkin, Natasha A.; Howdle, Steven M.; Torto, Nelson; Wagberg, Lars and Turner, Charlotta LU (2014) In Journal of Supercritical Fluids 95. p.610-617
Abstract
In this paper we present a method to produce superhydrophobic polymeric coatings by combining the rapid expansion of supercritical solutions (RESS) with electrostatic deposition (ED). A copolymer, poly(vinyl acetate)-poly(vinyl pivalate) was dissolved in a mixture of supercritical carbon dioxide and acetone and sprayed through a nozzle with an applied voltage of 8 kV onto a surface placed on a earthed collector. Spray distance and polymer concentration were altered to find the most suitable spraying conditions. Superhydrophobic surfaces were produced when spraying both with and without a voltage, although the water repellent surfaces could be produced at a larger variety of processing parameters using the RESS-ED technique. The greatest... (More)
In this paper we present a method to produce superhydrophobic polymeric coatings by combining the rapid expansion of supercritical solutions (RESS) with electrostatic deposition (ED). A copolymer, poly(vinyl acetate)-poly(vinyl pivalate) was dissolved in a mixture of supercritical carbon dioxide and acetone and sprayed through a nozzle with an applied voltage of 8 kV onto a surface placed on a earthed collector. Spray distance and polymer concentration were altered to find the most suitable spraying conditions. Superhydrophobic surfaces were produced when spraying both with and without a voltage, although the water repellent surfaces could be produced at a larger variety of processing parameters using the RESS-ED technique. The greatest improvement of using the RESS-ED process was that larger and thinner coatings were produced with a more even surface coverage of the created polymer particles compared to spraying without the applied voltage. (C) 2014 The Authors. Published by Elsevier B.V. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
Superhydrophobic coating, RESS, Electrostatic deposition, Poly(vinyl, acetate)-poly(vinyl pivalate), Supercritical solution
in
Journal of Supercritical Fluids
volume
95
pages
610 - 617
publisher
Elsevier
external identifiers
  • wos:000347360800072
  • scopus:84916638240
ISSN
0896-8446
DOI
10.1016/j.supflu.2014.09.014
language
English
LU publication?
yes
id
1ff6f35c-7a30-49b2-9df2-0a4cc3c4c34a (old id 5084889)
date added to LUP
2015-02-25 17:33:37
date last changed
2017-01-01 04:07:03
@article{1ff6f35c-7a30-49b2-9df2-0a4cc3c4c34a,
  abstract     = {In this paper we present a method to produce superhydrophobic polymeric coatings by combining the rapid expansion of supercritical solutions (RESS) with electrostatic deposition (ED). A copolymer, poly(vinyl acetate)-poly(vinyl pivalate) was dissolved in a mixture of supercritical carbon dioxide and acetone and sprayed through a nozzle with an applied voltage of 8 kV onto a surface placed on a earthed collector. Spray distance and polymer concentration were altered to find the most suitable spraying conditions. Superhydrophobic surfaces were produced when spraying both with and without a voltage, although the water repellent surfaces could be produced at a larger variety of processing parameters using the RESS-ED technique. The greatest improvement of using the RESS-ED process was that larger and thinner coatings were produced with a more even surface coverage of the created polymer particles compared to spraying without the applied voltage. (C) 2014 The Authors. Published by Elsevier B.V.},
  author       = {Ovaskainen, Louise and Chigome, Samuel and Birkin, Natasha A. and Howdle, Steven M. and Torto, Nelson and Wagberg, Lars and Turner, Charlotta},
  issn         = {0896-8446},
  keyword      = {Superhydrophobic coating,RESS,Electrostatic deposition,Poly(vinyl,acetate)-poly(vinyl pivalate),Supercritical solution},
  language     = {eng},
  pages        = {610--617},
  publisher    = {Elsevier},
  series       = {Journal of Supercritical Fluids},
  title        = {Superhydrophobic polymeric coatings produced by rapid expansion of supercritical solutions combined with electrostatic deposition (RESS-ED)},
  url          = {http://dx.doi.org/10.1016/j.supflu.2014.09.014},
  volume       = {95},
  year         = {2014},
}