Aerogels from nanofibrillated cellulose with tunable oleophobicity

Aerogels from nanofibrillated cellulose with tunable oleophobicity

The formation of structured porous aerogels of nanofibrillated cellulose (NFC) by freeze-drying has been demonstrated. The aerogels have a high porosity, as shown by FE-SEM and nitrogen adsorption/desorption measurements, and a very low density ( 90°) for castor oil ( γ lv = 35.8 mN m −1 ) and hexad...

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Veröffentlicht in:Soft matter 2010-01, Vol.6 (14), p.3298-335
Hauptverfasser: Aulin, Christian, Netrval, Julia, Wågberg, Lars, Lindström, Tom
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
COHERENT EXPANDED AEROGELS
HYDROGEN-BONDING SYSTEM
HYDROPHOBIC SURFACES
Kemi
MICROFIBRILLATED CELLULOSE
NATIVE CELLULOSE
NATURAL SCIENCES
NATURVETENSKAP
NEUTRON FIBER DIFFRACTION
ORGANIC AEROGELS
SUPER-WATER-REPELLENT
SUPERHYDROPHOBIC SURFACE
SYNCHROTRON X-RAY
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Zusammenfassung:The formation of structured porous aerogels of nanofibrillated cellulose (NFC) by freeze-drying has been demonstrated. The aerogels have a high porosity, as shown by FE-SEM and nitrogen adsorption/desorption measurements, and a very low density ( 90°) for castor oil ( γ lv = 35.8 mN m −1 ) and hexadecane ( γ lv = 27.5 mN m −1 ). The formation of structured nanofibrillated cellulose aerogels with tunable oleophobicity has been demonstrated. The SEM-image shows the structure for an aerogel frozen at a concentration of 0.7 wt% and the corresponding wetting of the oleophobic aerogel with castor oil.
ISSN:1744-683X
1744-6848
1744-6848
DOI:10.1039/c001939a