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Assembly of Debranched Xylan from Solution and on Nanocellulosic Surfaces

Toon J. Bosmans (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Agnes Stepan (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Guillermo Toriz (Institutionen för kemi- och bioteknik, Polymerteknologi) ; S. Renneckar ; E. Karabulut ; L. Wagberg ; Paul Gatenholm (Institutionen för kemi- och bioteknik, Polymerteknologi)
Biomacromolecules (1525-7797). Vol. 15 (2014), 3, p. 924-930.
[Artikel, refereegranskad vetenskaplig]

This study focused on the assembly characteristics of debranched xylan onto cellulose surfaces. A rye arabinoxylan polymer with an initial arabinose/xylose ratio of 0.53 was debranched with an oxalic acid treatment as a function of time. The resulting samples contained reduced arabinose/xylose ratios significantly affecting the molecular architecture and solution behavior of the biopolymer. With this treatment, an almost linear xylan with arabinose DS of only 0.04 was obtained. The removal of arabinose units resulted in the self-assembly of the debranched polymer in water into stable nanoparticle aggregates with a size around 300 nm with a gradual increase in crystallinity of the isolated xylan. Using quartz crystal microbalance with dissipation monitoring, the adsorption of xylan onto model cellulose surfaces was quantified. Compared to the nonmodified xylan, the adsorption of debranched xylan increased from 0.6 to 5.5 mg m(-2). Additionally, adsorption kinetics suggest that the nanoparticles rapidly adsorbed to the cellulose surfaces compared to the arabinoxylan. In summary, a control of the molecular structure of xylan influences its ability to form a new class of polysaccharide nanoparticles in aqueous suspensions and its interaction with nanocellulose surfaces.

Nyckelord: CORN COB XYLAN, STRENGTH PROPERTIES, ARABINOXYLAN FILMS, BARRIER FILMS, SOFTWOOD PULP, CELLULOSE, ADSORPTION, NANOPARTICLES, CHROMATOGRAPHY, SUBSTITUTION, A ICM, 1973, CARBOHYDRATE RESEARCH, V29, P363



Denna post skapades 2014-04-17. Senast ändrad 2016-07-01.
CPL Pubid: 196913

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Kemiteknik
Polymerteknologi

Chalmers infrastruktur