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Adsorption of Arabinoxylan on Cellulosic Surfaces: Influence of Degree of Substitution and Substitution Pattern on Adsorption Characteristics

Tobias Köhnke (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik) ; Åsa Östlund (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Harald Brelid (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
Biomacromolecules (1525-7797). Vol. 12 (2011), 7, p. 2633-2641.
[Artikel, refereegranskad vetenskaplig]

This study presents results that show that the fine structure of arabinoxylan affects its interaction with cellulosic surfaces, an important understanding when designing and evaluating properties of xylan-cellulose-based materials. Arabinoxylan samples, with well-defined structures, were prepared from a wheat flour arabinoxylan with targeted enzymatic hydrolysis. Turbidity measurements and analyses using NMR diffusometry showed that the solubility and the hydrodynamic properties of arabinoxylan are determined not only by the degree of substitution but also by the substitution pattern. On the basis of results obtained from adsorption experiments on microcrystalline cellulose particles and on cellulosic model surfaces investigated with quartz crystal microbalance with dissipation monitoring, it was also found that arabinoxylan adsorbs irreversibly on cellulosic surfaces and that the adsorption characteristics, as well as the properties of the adsorbed layer, are controlled by the fine structure of the xylan molecule.



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Denna post skapades 2011-07-11. Senast ändrad 2011-07-14.
CPL Pubid: 143372

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)
Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)

Ämnesområden

Materialvetenskap
Yt- och kolloidkemi
Pappers-, massa- och fiberteknik

Chalmers infrastruktur