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Nanoindentation of single pulp fibre cell walls

Adusumalli, Ramesh-Babu ; Mook, William ; Passas, Raphael ; Schwaller, Patrick ; Michler, Johann

In: Journal of Materials Science, 2010, vol. 45, no. 10, p. 2558-2563

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    Title
    • Nanoindentation of single pulp fibre cell walls
    Author
    • Adusumalli, Ramesh-Babu. Swiss Federal Laboratories for Materials Testing and Research, Materials Technology Department, EMPA, 3602, Thun, Switzerland
    • Mook, William. Swiss Federal Laboratories for Materials Testing and Research, Materials Technology Department, EMPA, 3602, Thun, Switzerland
    • Passas, Raphael. Laboratory of Pulp and Paper Science and Graphic Arts, Grenoble INP-Pagora, 38400, Saint Martin D'Hères cedex, France
    • Schwaller, Patrick. Swiss Federal Laboratories for Materials Testing and Research, Materials Technology Department, EMPA, 3602, Thun, Switzerland
    • Michler, Johann. Swiss Federal Laboratories for Materials Testing and Research, Materials Technology Department, EMPA, 3602, Thun, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Materials Science, 2010, vol. 45, no. 10, p. 2558-2563. Springer US; http://www.springer-ny.com
    Other Version
    Classification
    • Engineering
    OAI-PMH Identifier
    • oai:doc.rero.ch:319126
    Summary
    Unrefined chemical pulps of bleached and unbleached softwood (Scots pine, Pinus sylvestris) and hardwood (Eucalyptus, Eucalyptus globulus) were subjected to indentation tests using a nanoindenter equipped with an AFM scanner. Tests on unbleached pulps revealed no difference in hardness values between softwood and hardwood, but bleaching treatment decreased the hardness values of both pulps. Indentation modulus of 12GPa was observed for unbleached softwood pulps, which is 25% higher than unbleached hardwood pulps. Bleaching treatment again decreased the indentation modulus of the softwood pulps, whereas it slightly increased the indentation modulus of the hardwood pulps. After bleaching and drying processes, only negligible difference was observed in cell wall mechanical properties (hardness and indentation modulus) between hardwood and softwood pulps. This study is based on latewood pulp fibres