Superhydrophobic polymeric coatings produced by rapid expansion of supercritical solutions combined with electrostatic depostion (RESS-ED)
2014 (English)In: Journal of Supercritical Fluids, ISSN 0896-8446, Vol. 95, 610-617 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 95, 610-617 p.
Acetone, Carbon dioxide, Deposition, Electric grounding, Electromagnetic wave emission, Electrostatic coatings, Electrostatics, Hydrophobicity, Plastic coatings, Polymers, Supercritical fluid extraction, Volatile fatty acids, Electrostatic deposition, Poly(vinyl pivalate), RESS, Supercritical solution, Superhydrophobic coatings
IdentifiersURN: urn:nbn:se:kth:diva-151442DOI: 10.1016/j.supflu.2014.09.014ISI: 000347360800072ScopusID: 2-s2.0-84916638240OAI: oai:DiVA.org:kth-151442DiVA: diva2:748755
FunderSwedish Foundation for Strategic Research , RMA08-0044Swedish Research Council, 2010-33
QC 201502052014-09-222014-09-222015-02-05Bibliographically approved