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Cellulose

, Volume 19, Issue 2, pp 401–410 | Cite as

Ultra porous nanocellulose aerogels as separation medium for mixtures of oil/water liquids

  • Nicholas Tchang CervinEmail author
  • Christian Aulin
  • Per Tomas Larsson
  • Lars Wågberg
Article

Abstract

A novel type of sponge-like material for the separation of mixed oil and water liquids has been prepared by the vapour deposition of hydrophobic silanes on ultra-porous nanocellulose aerogels. To achieve this, a highly porous (>99%) nanocellulose aerogel with high structural flexibility and robustness is first formed by freeze-drying an aqueous dispersion of the nanocellulose. The density, pore size distribution and wetting properties of the aerogel can be tuned by selecting the concentration of the nanocellulose dispersion before freeze-drying. The hydrophobic light- weight aerogels are almost instantly filled with the oil phase when selectively absorbing oil from water, with a capacity to absorb up to 45 times their own weight in oil. The oil can also be drained from the aerogel and the aerogel can then be reused for a second absorption cycle.

Keywords

Absorption Aerogel Cellulose Desorption Oleophilic Separation Superhydrophobic 

Notes

Acknowledgments

The authors thank Wallenberg Wood Science Center for financial support. Professor Lars G. Ödberg is acknowledged for valuable discussions and Magnus Hillergren for professional help with the high speed camera. Joanna Hornatowska at Innvenita AB is acknowledged for the tomography measurements and Innventia AB is thanked for supplying NFC. Dr. Andrei Shchukarev at Umeå University is acknowledged for performing the XPS experiments.

Supplementary material

10570_2011_9629_MOESM1_ESM.doc (22 kb)
Movies on oil absorption (Hexadecane) and high speed camera of an oil drop (Hexadecane) absorbed in the aerogel are available free of charge. Supplementary material 1 (DOC 22 kb)

Supplementary material 2 (MPG 46509 kb)

Supplementary material 3 (MOV 181459 kb)

Supplementary material 4 (MPG 68278 kb)

Supplementary material 5 (AVI 1646661 kb)

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Nicholas Tchang Cervin
    • 1
    Email author
  • Christian Aulin
    • 1
    • 2
  • Per Tomas Larsson
    • 1
    • 2
    • 3
  • Lars Wågberg
    • 1
    • 2
    • 3
  1. 1.Wallenberg Wood Science CenterKTH Royal Institute of TechnologyStockholmSweden
  2. 2.Innventia ABStockholmSweden
  3. 3.Department of Fibre and Polymer Technology, School of Chemical Science and EngineeringKTH Royal Institute of TechnologyStockholmSweden

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