Nanoindentation of single pulp fibre cell walls

Unrefined chemical pulps of bleached and unbleached softwood (Scots pine, Pinus sylvestris ) and hardwood (Eucalyptus, E ucalyptus globulus ) were subjected to indentation tests using a nanoindenter equipped with an AFM scanner. Tests on unbleached pulps revealed no difference in hardness values bet...

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Bibliographic Details
Published in:Journal of materials science 2010-05, Vol.45 (10), p.2558-2563
Main Authors: Adusumalli, Ramesh-Babu, Mook, William M., Passas, Raphael, Schwaller, Patrick, Michler, Johann
Format: Article
Language:English
Subjects:
Bleaching
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Eucalyptus
Fibre
Hardness
Hardness tests
Materials Science
Mechanical properties
Nanoindentation
Nanoindenters
Organic chemistry
Polymer Sciences
Solid Mechanics
Walls
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Summary:Unrefined chemical pulps of bleached and unbleached softwood (Scots pine, Pinus sylvestris ) and hardwood (Eucalyptus, E ucalyptus 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 12 GPa 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.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-010-4226-9