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Aerogels from nanof...
Aerogels from nanofibrillated cellulose with tunable oleophobicity
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- Aulin, Christian (författare)
- KTH,Fiberteknologi
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- Netrval, Julia (författare)
- KTH,Biokompositer
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- Wågberg, Lars (författare)
- KTH,Fiberteknologi
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- Lindström, Tom (författare)
- RISE,Innventia
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(creator_code:org_t)
- Royal Society of Chemistry (RSC), 2010
- 2010
- Engelska.
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Ingår i: SOFT MATTER. - : Royal Society of Chemistry (RSC). - 1744-683X .- 1744-6848. ; 6:14, s. 3298-3305
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- 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 (theta* >> 90 degrees) for castor oil (gamma(1v) = 35.8 mN m(-1)) and hexadecane (gamma(1v) = 27.5 mN m(-1)).
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Nyckelord
- COHERENT EXPANDED AEROGELS
- NEUTRON FIBER DIFFRACTION
- HYDROGEN-BONDING SYSTEM
- SUPER-WATER-REPELLENT
- SYNCHROTRON X-RAY
- ORGANIC AEROGELS
- MICROFIBRILLATED CELLULOSE
- NATIVE CELLULOSE
- SUPERHYDROPHOBIC SURFACE
- HYDROPHOBIC SURFACES
- Chemistry
- Kemi
Publikations- och innehållstyp
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- art (ämneskategori)
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