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Aerogels from nanofibrillated cellulose with tunable oleophobicity
RISE, Innventia.
2010 (English)In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 6, no 14, 3298-3305 p.Article in journal (Refereed) Published
Abstract [en]

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 (<0.03 g cm-3). The density and surface texture of the aerogels can be tuned by selecting the concentration of the NFC dispersions before freeze-drying. Chemical vapor deposition (CVD) of 1H,1H,2H,2H- perfluorodecyltrichlorosilane (PFOTS) was used to uniformly coat the aerogel to tune their wetting properties towards non-polar liquids. An XPS analysis of the chemical composition of the PFOTS-modified aerogels demonstrated the reproducibility of the PFOTS-coating and the high atomic fluorine concentration (ca. 51%) in the surfaces. The modified aerogels formed a robust composite interface with high apparent contact angles (* ≫ 90°) for castor oil (γlv = 35.8 mN m-1) and hexadecane (γlv = 27.5 mN m-1).

Place, publisher, year, edition, pages
2010. Vol. 6, no 14, 3298-3305 p.
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:ri:diva-29557DOI: 10.1039/c001939aScopusID: 2-s2.0-77954584209OAI: oai:DiVA.org:ri-29557DiVA: diva2:1095637
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cited By 127

Available from: 2017-05-15 Created: 2017-05-15 Last updated: 2017-05-15Bibliographically approved

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