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Mechano-sorptive creep in wood fibres

Abstract

In order to investigate the way in which fibre properties affect the mechano-sorptive creep phenomenon in paper, single wood fibres were exposed to tensile stresses at a constant humidity of 80% relative humidity (RH) and in a cyclic humidity environment varying between 80 and 30% RH. Contrary to earlier claims, it was demonstrated that single wood fibres exposed to a cyclic RH show a considerably higher creep than that corresponding to the highest RH experienced in the cycle, i.e., a mechano-sorptive behaviour. The creep strain rate at cyclic humidity was shown to be a function of the creep rate at constant climate, and to be an apparent linear function of the applied stress.

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Acknowledgements

This study has been partly supported by the FWF – Fonds zur Förderung der wissenschaftlichen Forschung, Austria. We wish to thank Karin Jungnikl for carrying out the microfibril angle measurements.

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Correspondence to Lennart Salmén.

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Olsson, AM., Salmén, L., Eder, M. et al. Mechano-sorptive creep in wood fibres. Wood Sci Technol 41, 59–67 (2007). https://doi.org/10.1007/s00226-006-0086-5

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  • DOI: https://doi.org/10.1007/s00226-006-0086-5

Keywords

  • Creep Rate
  • Dynamic Mechanical Analyser
  • Creep Strain
  • Wood Fibre
  • Creep Strain Rate