Coral-like Janus Porous Spheres

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• 作者：Hang Zhang ; Qian Wang ; Bingyin Jiang ; Fuxin Liang ; Zhenzhong Yang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：December 7, 2016
• 年：2016
• 卷：8
• 期：48
• 页码：33250-33255
• 全文大小：386K
• ISSN：1944-8252

文摘

A Janus porous sphere with a coral-like microstructure is prepared by stepwise dealloying a metallic alloy sphere and sequential modification (for example, using silanes and polymers). Nanoscale coral-like microstructure of the internal skeleton gives remarkable capillary force, thus accelerating the mass transportation. Starting from the outer layer of the sphere, stepwise dealloying can achieve different layers inwardly, thus introducing different composition and performance. As an example, poly(ethylene glycol)–poly(N-isopropylacrylamide) (PEG–PNIPAM)- and poly(ethylene glycol)–poly(N,N-diethylamino-2-ethylmethacrylate) (PEG–PDEAEMA)-responsive Janus porous spheres can quickly capture oil by simply changing temperature or pH. Similarly, release is also triggered.