Novel robust cellulose-based foam with pH and light dual-response for oil recovery
Qian WANG , Guihua MENG , Jianning WU , Yixi WANG , Zhiyong LIU , Xuhong GUO
Front. Mater. Sci. ›› 2018, Vol. 12 ›› Issue (2) : 118 -128.
Novel robust cellulose-based foam with pH and light dual-response for oil recovery
We fabricated pH and light dual-responsive adsorption materials which could induce the transition of surface wettability between hydrophobicity and hydrophilicity by using ATRP. The structure and morphology of adsorption materials were confirmed by ATR-FTIR, XPS, TGA and SEM. It showed that the modified cellulose (CE)-based foam was hydrophobic, which can adsorb a range of oils and organic solvents in water under pH= 7.0 or visible light irradiation (λ>500 nm). Meanwhile, the wettability of robust CE-based foam can convert hydrophobicity into hydrophilicity and underwater oleophobicity under pH= 3.0 or UV irradiation (λ = 365 nm), giving rise to release oils and organic solvents. Most important of all, the adsorption and desorption processes of the modified CE-based foam could be switched by external stimuli. Furthermore, the modified CE-based foam was not damaged and still retained original performance after reversible cycle repeated for many times with variation of surface wettability. In short, it indicates that CE-based foam materials with switchable surface wettability are new responsive absorbent materials and have owned potential application in the treatment of oil recovery.
cellulose-based foam / dual-responsive / adsorption materials / switchable wettability / oil recovery
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Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature
Supplementary files
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