Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611-6400, USA.
Macromol Rapid Commun. 2011 Nov 1;32(21):1716-21. doi: 10.1002/marc.201100373. Epub 2011 Aug 23.
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.
聚苯乙烯（PS）/聚（N-异丙基丙烯酰胺）（PNIPA）共混（bl-PS/PNIPA）和交联聚[（N-异丙基丙烯酰胺）-共-[甲基丙烯酸]（PNIPAMAA）（xl-NIPAMAA）。bl-PS/PNIPA 和 xl-PNIPAMAA 纤维垫均表现出可重复切换的表面润湿性，bl-PS/PNIPA 纤维垫在极端温度下接近超疏水≥150°和超亲水接触角（CA）值。在 10°C 下进行的重量损失研究表明，交联 PNIPAMAA 纤维垫比 bl-PS/PNIPA 纤维垫具有更好的结构完整性。PNIPA 表面化学和 Cassie-Baxter 模型被用来解释观察到的极端润湿性背后的机制。
