pH-Induced Reversible Wetting Transition between the Underwater Superoleophilicity and Superoleophobicity

被引：138

作者：

Cheng, Zhongjun ^{[2
]}

Lai, Hua ^{[2
]}

Du, Ying ^{[2
]}

Fu, Kewei ^{[2
]}

Hou, Rui ^{[2
]}

Li, Chong ^{[2
]}

Zhang, Naiqing ^{[1
,2
]}

Sun, Kening ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Municipal & Environm Engn, Harbin 150090, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Nat Sci Res Ctr, Harbin 150090, Heilongjiang, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金; 高等学校博士学科点专项科研基金;

关键词：

underwater superoleophilic; underwater superoleophobic; pH-responsive; oil/water separation; COATED MESH FILMS; SUPERHYDROPHOBIC SURFACES; OIL/WATER SEPARATION; ADHESIVE SUPEROLEOPHOBICITY; MICROFLUIDIC CHANNELS; OIL CAPTURE; WATER; INTERFACE; REMOVAL; WETTABILITY;

D O I：

10.1021/am4047393

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

Surfaces with controlled oil wettability in water have great potential for numerous underwater applications. In this work, we report a smart surface with pH-responsive oil wettability. The surface shows superoleophilicity in acidic water and superoleophobicity in basic water. Reversible transition between the two states can be achieved through alteration of the water pH. Such smart ability of the surface is due to the cooperation between the surface chemistry variation and hierarchical structures on the surface. Furthermore, we also extended this strategy to the copper mesh substrate and realized the selective oil/water separation on the as-prepared film. This paper reports a new surface with excellently controllable underwater oil wettability, and we believe such a surface has a lot of applications, for instance, microfluidic devices, bioadhesion, and antifouling materials.

引用

页码：636 / 641

页数：6

共 66 条

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A STUDY BY CONTACT-ANGLE OF THE ACID-BASE BEHAVIOR OF MONOLAYERS CONTAINING OMEGA-MERCAPTOCARBOXYLIC ACIDS ADSORBED ON GOLD - AN EXAMPLE OF REACTIVE SPREADING [J].