期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 32, 期 21, 页码 1716-1721出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201100373
关键词
electrospinning; fibers; responsive wettability; stimuli-sensitive polymers; surface chemistry
资金
- Laboratory Directed Research and Development (LDRD)
- National Institute for Nano Engineering (NINE) at Sandia National Laboratories
- Sandia Corporation, a Lockheed Martin Company [DE-AC04-94AL85000]
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 degrees and superhydrophilic contact angle (CA) values at extreme temperatures. Weight loss studies carried out at 10 degrees 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.
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