An Underwater Superoleophobic Surface That Can Be Activated/Deactivated via External Triggers
作者： Gary J. Dunderdale , Chihiro Urata , Atsushi Hozumi
DOI: 10.1021/LA503492E
关键词:
摘要: Poly[(2-dimethylamino)ethyl methacrylate] (pDMAEMA) brush surfaces were prepared using a facile aqueous Activators ReGenerated by Electron Transfer Atom Radical Polymerization (ARGET-ATRP) protocol at ambient temperature without any need to purge reaction solutions of oxygen. This produced underwater superoleophobic surfaces, which exhibited high advancing (θA, 164–166°) and receding (θR, 153–165°) contact angles (CAs) low CA hysteresis (1–11°) with variety oils. Both in situ spectroscopic ellipsometry dynamic measurements confirmed that pDMAEMA responded three different external stimuli (pH, ionic strength, temperature) changing their thicknesses, degree hydration, or chemical composition. Increasing pH resulted the largest decrease followed increasing temperature, strength gave smallest change hydration. Coincident these structural changes, stimulus-responsive dewetting behavior v...
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