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Mechanosorptive creep in nanocellulose materials
Linköping University, Department of Management and Engineering, Mechanics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-1503-8293
Department of Fiber Technology, KTH.
Solid Mechanics, KTH.
Department of Fiber Technology, KTH.
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2012 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 19, no 3, 809-819 p.Article in journal (Refereed) Published
Abstract [en]

The creep behavior of nanocellulose films and aerogels are studied in a dynamic moisture environment, which is crucial to their performance in packaging applications. For these materials, the creep rate under cyclic humidity conditions exceeds any constant humidity creep rate within the cycling range, a phenomenon known as mechanosorptive creep. By varying the sample thickness and relative humidity ramp rate, it is shown that mechanosorptive creep is not significantly affected by the through-thickness moisture gradient. It is also shown that cellulose nanofibril aerogels with high porosity display the same accelerated creep as films. Microstructures larger than the fibril diameter thus appear to be of secondary importance to mechanosorptive creep in nanocellulose materials, suggesting that the governing mechanism is found between molecular scales and the length-scales of the fibril diameter.

Place, publisher, year, edition, pages
Springer, 2012. Vol. 19, no 3, 809-819 p.
Keyword [en]
nanofibrillated cellulose, mechanosorptive creep, accelerated creep, sorption
National Category
Paper, Pulp and Fiber Technology
URN: urn:nbn:se:liu:diva-77001DOI: 10.1007/s10570-012-9665-9ISI: 000303459200022OAI: diva2:524360
funding agencies|BiMaC Innovation||Available from: 2012-05-02 Created: 2012-05-02 Last updated: 2016-05-04

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Lindström, Stefan B
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