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Improved barrier fi...
Improved barrier films of cross-linked cellulose nanofibrils: a microscopy study
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- Larsson, Per A., 1980- (författare)
- KTH,Fiberteknologi,VinnExcellens Centrum BiMaC Innovation
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- Pettersson, Torbjörn (författare)
- KTH,Fiber- och polymerteknologi
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- Wågberg, Lars (författare)
- KTH,Fiber- och polymerteknologi
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(creator_code:org_t)
- Thomas Telford Ltd. 2014
- 2014
- Engelska.
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Ingår i: Green materials. - : Thomas Telford Ltd.. - 2049-1220 .- 2049-1239. ; 2:4, s. 163-168
- Relaterad länk:
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http://www.icevirtua...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- It is highly desirable to replace gas barriers of aluminium and non-renewable plastics in order to lower our ecological footprint. One interesting candidate is films made from cellulose nanofibrils (CNFs), which after cross-linking have been shown to have competitive barrier properties even at a high relative humidity (80% RH). This work presents studies at even higher relative humidity (90% RH) and microscopic studies of what happens when unmodified and cross-linked CNF films are exposed to water. The microscopy techniques used were scanning electron microscopy of dry and wet cross-sections of films after freeze-drying and atomic force microscopy in the dry state and in the wet state shortly after wetting. Both techniques clearly revealed that the cross-links prevent the CNFs from separating from each other and hence prevent the films from swelling, so that the free-volume-sensitive gas permeability is maintained at a low level.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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