Jump to main content
Jump to site search

Issue 5, 2015
Previous Article Next Article

A cellulose sponge with robust superhydrophilicity and under-water superoleophobicity for highly effective oil/water separation

Author affiliations

Abstract

We fabricate a cellulose sponge with stable superoleophobicity (θoil > 150°) under water and superhydrophilic wettability (θwater ≈ 0°) under oil without any further chemical modification for oil–water emulsion separation. The cellulose sponge shows superoleophobicity to various oils under water and possesses stable superoleophobicity in corrosive liquids like strong acid, alkali and salt solution. The sponge is made from the dissolution and regeneration of cellulose powder which is green, low cost, simple and easy to scale up. The natural hydrophilicity of the cellulose ensures its excellent under-water superoleophobicity and antifouling properties. The double layer construction of different pore sizes, which contains a top-layer with a pore size lower than 1 μm and a sub-layer with a pore size larger than 3 μm, ensures that the oil phase is resisted and the water phase easily and quickly permeates the sponge. Our cellulose sponge can separate oil–water mixtures, with >99.94% separation efficiency, solely using gravity and has excellent antifouling properties.

Graphical abstract: A cellulose sponge with robust superhydrophilicity and under-water superoleophobicity for highly effective oil/water separation

Back to tab navigation

Supplementary files

Article information


Submitted
05 Jan 2015
Accepted
30 Mar 2015
First published
30 Mar 2015

Green Chem., 2015,17, 3093-3099
Article type
Paper

A cellulose sponge with robust superhydrophilicity and under-water superoleophobicity for highly effective oil/water separation

G. Wang, Y. He, H. Wang, L. Zhang, Q. Yu, S. Peng, X. Wu, T. Ren, Z. Zeng and Q. Xue, Green Chem., 2015, 17, 3093
DOI: 10.1039/C5GC00025D

Social activity

Search articles by author

Spotlight

Advertisements