Cellulose

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Wettability-switchable bacterial cellulose/polyhemiaminal nanofiber aerogels for continuous and effective oil/water separation

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Abstract

Wettability-switchable bacterial cellulose/polyhemiaminal nanofiber aerogels were successfully prepared by a facile in situ polymerization of paraformaldehyde and 4,4′-diaminodiphenyl ether. The resultant aerogels displayed an interconnected porous structure, superior porosity, low density as well as hydrophobic–oleophilic properties. The aerogels could not only quickly and efficiently absorb the variety of oils or organic solvents from water, but also completely release the adsorbates in acid aqueous solutions by the aid of wettability switch (from hydrophobicity–oleophilicity to underwater superoleophobicity). Furthermore, the aerogels can continuously collect oils both on the water surface and in water-in-oil emulsions by a peristaltic pump.

Keywords

Bacterial cellulose Polyhemiaminal Nanofiber aerogels Wettability-switch Oil/water separation 
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Notes

Acknowledgments

This work is supported by the innovation team foundation of Education Department of Sichuan Province (No. 15TD0014).

Supplementary material

10570_2018_1770_MOESM1_ESM.pdf (427 kb)
Supplementary material 1 (PDF 427 kb)

Supplementary material 2 (WMV 158 kb)

Supplementary material 3 (WMV 2244 kb)

Supplementary material 4 (WMV 41057 kb)

Supplementary material 5 (WMV 23479 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory Cultivation Base for Nonmetal Composites and Functional MaterialsSouthwest University of Science and TechnologyMianyangPeople’s Republic of China
  2. 2.School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyangPeople’s Republic of China

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