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

POLYMER

卷:52

Article

Srinivasan, Siddarth¹  Chhatre, Shreerang S.¹  Mabry, Joseph M.²  Cohen, Robert E.¹  McKinley, Gareth H.³ 

[1] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

[2] USAF, Res Lab, Space & Missile Prop Div, Edwards AFB, CA 93524 USA

[3] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

关键词: Non-woven;    Fiber;    Superhydrophobic;   

DOI  :  10.1016/j.polymer.2011.05.008

来源: Elsevier

【 摘 要 】

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, gamma(sv) approximate to 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. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

Free