期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 3, 页码 2026-2030出版社
AMER CHEMICAL SOC
DOI: 10.1021/am405089m
关键词
thermoresponsive; pH-responsive; controllable oil/water separation; PDMAEMA hydrogel; smart materials
资金
- National Natural Science Foundation [51173099, 21134004]
- National High Technology Research and Development Program of China [2012AA030306]
- National Research Fund for Fundamental Key Projects [2011CB935700]
Thermo and pH dual-controllable oil/water separation materials are successfully fabricated by photo initiated free radical polymerization of dimethylamino ethyl methacrylate (DMAEMA). The PDMAEMA hydrogel coated mesh shows superhydrophilicity and underwater superoleophobicity at certain temperature and pH. Due to the double responsiveness of PDMAEMA hydrogel, the as-prepared mesh can selectively separate water from oil/water mixtures and make water and oil permeate through the mesh orderly and be collected separately by adjusting the temperature or pH. Water can pass through the as-prepared mesh under 55 degrees C (pH 7) and pH less than 13 (T = 25 degrees C) while oil is kept on the mesh. When the temperature is above 55 degrees C or pH is larger than 13, the water retention capacity of PDMAEMA hydrogel is significantly reduced and the swelling volume is decreased. Therefore, oil can permeate through the mesh and be collected in situ. Additionally, this material has excellent potential to be used in practical applications and has created a new field for water/oil separation in which the process can be diversified and more intelligent.
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