Friction between Cellulose Surfaces and Effect of Xyloglucan Adsorption

Johanna Stiernstedt,† Harry Brumer, III,‡ Qi Zhou,‡ Tuula T. Teeri,‡ and Mark W. Rutland*†
Department of Chemistry, Surface Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, Sweden and Institute for Surface Chemistry, Box 5607, SE-114 86 Stockholm, Sweden, and Department of Biotechnology, Royal Institute of Technology, AlbaNova University Center, SE-106 91 Stockholm, Sweden
Biomacromolecules, 2006, 7 (7), pp 2147–2153
DOI: 10.1021/bm060100i
Publication Date (Web): May 27, 2006
Copyright © 2006 American Chemical Society
†

 Royal Institute of Technology and Institute for Surface Chemistry.

,
‡

 AlbaNova University Center.

,
*

 To whom correspondence should be addressed. E-mail:  mark.rutland@ surfchem.kth.se; phone:  +46 8 790 99 14; fax:  +46 8 20 89 98.

Abstract

Abstract Image

The forces and friction between cellulose spheres have been measured in the absence and presence of xyloglucan using an atomic force microscope. The forces between cellulose are monotonically repulsive with negligible adhesion after contact is achieved. The friction coefficient is observed to be unusually high in comparison with other nanotribological systems. We have confirmed that xyloglucan adsorbs strongly to cellulose, which results in a much stronger adhesion, which is dependent on the time the surfaces are in contact. Xyloglucan also increases the repulsion on approach of the cellulose surfaces, and the friction is markedly reduced. The apparently incompatible observations of decreased friction in combination with increased adhesion fulfills many of the necessary criteria for a papermaking additive.

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History

  • Published In Issue July 10, 2006
  • Received February 3, 2006
    Revised Manuscript Received April 10, 2006

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