ACS AMI-Mussel-Inspired Hybrid Coatings that Transform Membrane Hydrophobicity into High Hydrophilicity and Underwater Superoleophobicity for Oil-in-Water Emulsion Separation
作者：Zhenxing Wang, ? Xu Jiang, ? Xiquan Cheng, ?,? Cher Hon Lau,* ,? and Lu Shao*
關(guān)鍵字：Membrane
論文來源：期刊
發(fā)表時間：2015年
Wefirst report here mussel-inspired, hybrid coatings
formed in a facile manner via simultaneous polymerization of musselinspired dopamine and hydrolysis of commercial tetraethoxysilane in
a single-step process. The hybrid coatings can firmly adhered on
hydrophobic polyvinylidene fluoride (PVDF) substrate, and the
hydrophilicity of the coating can be tuned by adjusting silane
concentration. The reason for the changed hydrophilicity of the
coating is disclosed by a series of characterization, and was applied to
rationally design optimized hybrid coatings that transform
commercial PVDF microfiltration (MF) membrane hydrophobicity
into high hydrophilicity with excellent water permeability and underwater superoleophobicity for oil-in-water emulsion
separation. The PVDF MF membrane decorated with optimized coatings has ultrahigh waterflux (8606 L m
?2
h
?1
only under
0.9 bar, which is 34 times higher than that of pristine membrane), highly efficient oil-in-water emulsion separation ability at
atmospheric pressure (filtrate flux of 140 L m
?2
h
?1
) and excellent antifouling performance. More importantly, these membranes
are extremely stable as underwater superoleophobicity are maintained, even after rigorous washings or cryogenic bending,
disclosing outstanding stability. The simplicity and versatility of this novel mussel-inspired one-step strategy may bridge the
material-induced technology gap between academia and industry, which makes it promising for eco-friendly applications