title: Thermally tunable surface wettability of electrospun fiber mats: polystyrene/poly(N-isopropylacrylamide) blended versus crosslinked poly[(N-isopropylacrylamide)-co-(methacrylic acid)].
abstract: This work reports on thermally tunable surface wettability of electrospun fiber mats of: polystyrene (PS)/poly(N-isopropylacrylamide) (PNIPA) blended (bl-PS/PNIPA) and crosslinked poly[(N-isopropylacrylamide)-co-[methacrylic acid)] (PNIPAMAA) (xl-NIPAMAA). Both the bl-PS/PNIPA and xl-PNIPAMAA fiber mats demonstrate reversibly switchable surface wettability, with the bl-PS/PNIPA fiber mats approaching superhydrophobic ≥150° and superhydrophilic contact angle (CA) values at extreme temperatures. Weight loss studies carried out at 10 °C indicate that the crosslinked PNIPAMAA fiber mats had better structural integrity than the bl-PS/PNIPA fiber mats. PNIPA surface chemistry and the Cassie-Baxter model were used to explain the mechanism behind the observed extreme wettability.
authors: Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611-6400, USA.
authors: Palanikkumaran
authors: P
authors: Muthiah
authors: Sarah M
authors: SM
authors: Hoppe
authors: Timothy J
authors: TJ
authors: Boyle
authors: Wolfgang
authors: W
authors: Sigmund
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D000180:Acrylic Resins; D003432:Cross-Linking Reagents / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D017155:Wettability
chemical_list: D000178:Acrylamides; D000180:Acrylic Resins; D003432:Cross-Linking Reagents; D008689:Methacrylates; D011108:Polymers; D011137:Polystyrenes; C008384:methacrylic acid; C052970:poly-N-isopropylacrylamide; C067295:N-isopropylacrylamide