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Solution spraying of poly(methyl methacrylate) blends to fabricate microtextured, superoleophobic surfaces

Author(s)
Srinivasan, Siddarth; Chhatre, Shreerang S.; Mabry, Joseph M.; Cohen, Robert E.; McKinley, Gareth H.
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Abstract
We describe a simple technique to prepare superhydrophobic and superoleophobic microtextured surfaces by spray coating a blend of poly(methyl methacrylate) (PMMA) and the low surface energy molecule 1H,1H,2H,2H-heptadecafluorodecyl polyhedral oligomeric silsesquioxane (fluorodecyl POSS, γ[subscript sv] ≈ 10 mN/m) using an air brush with a pressurized nitrogen stream. Scanning electron micrographs show the formation of microtextured surfaces possessing re-entrant curvature; a critical feature for obtaining liquid repellency with low surface tension liquids. The surface morphology can be tuned systematically from a corpuscular or spherical microstructure to a beads-on-string structure and finally to bundled fibers by controlling the solution concentration and molecular weight of the sprayed polymer. The oleophobicity of the resulting structures is characterized by advancing and receding contact angle measurements with liquids of a range of surface tensions.
Date issued
2011-05
URI
http://hdl.handle.net/1721.1/99351
Department
Massachusetts Institute of Technology. Department of Chemical Engineering; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Polymer
Publisher
Elsevier
Citation
Srinivasan, Siddarth, Shreerang S. Chhatre, Joseph M. Mabry, Robert E. Cohen, and Gareth H. McKinley. “Solution Spraying of Poly(methyl Methacrylate) Blends to Fabricate Microtextured, Superoleophobic Surfaces.” Polymer 52, no. 14 (June 2011): 3209–18.
Version: Author's final manuscript
ISSN
00323861

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