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By Yongmei, Zheng

ISBN-10: 9814463612

ISBN-13: 9789814463614

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This kind of smart oil/water separation materials exhibits switchable superhydrophobicity–superhydrophilicity, and underwater superoleophobicity at the special oil–water–solid threephase interface. 34 demonstrates the photo-induced oil/ water separation process with a home-made device. The aligned ZnO nanorod array coated mesh film was fixed with a glass funnel. Firstly, a little amount of water was poured into the upper glass funnel to form a water film on the coated mesh film. Then the mixture of oil and water with ratio of 3:7 in volume was poured into the upper glass funnel.

PNIPAAm shrinks as the temperature increases, but it still possesses a larger surface area. Therefore, the BCP of PMMA-bPNIPAAm film is hydrophobic. PMMA shows underwater oleophilic property. 25 In water, the BCP of PMMA-b-PNIPAAm selfassembles into a lamellar structure. PNIPAAm domains lay in between the hard walls of PMMA on a nanometer scale. Water tends to release from the confined space. The degree of dehydration of PNIPAAm can become quite high with the aid of PMMA in the nanostructure. The nanoPNIPAAm domains become more oleophilic.

19. Osborn JM, Schneider EL (1988) Morphological-studies of the Nymphaeaceae Sensu Lato. 16. The floral biology of Brasenia-Schreberi. Ann Mo Bot Gard, 75(3), 778–794. 20. Liu MJ, Wang ST, Wei ZX, Song YL, Jiang L (2009) Bioinspired design of a superoleophobic and low adhesive water/solid interface, Adv Mater, 21(6), 665–669. 21. Qunfeng C: Unpublished Data. 22. Jung YC, Bhushan B (2009) Wetting behavior of water and oil droplets in three-phase interfaces for hydrophobicity/philicity and oleophobicity/philicity†, Langmuir, 25(24), 14165–14173.

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Bio-inspired wettability surfaces : developments in micro- and nanostructures by Yongmei, Zheng

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