Assembly of Debranched Xylan from Solution and on Nanocellulosic Surfaces
Artikel i vetenskaplig tidskrift, 2014

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.

NANOPARTICLES

SOFTWOOD PULP

CORN COB XYLAN

ADSORPTION

CARBOHYDRATE RESEARCH

ARABINOXYLAN FILMS

SUBSTITUTION

STRENGTH PROPERTIES

BARRIER FILMS

V29

CELLULOSE

1973

P363

A ICM

CHROMATOGRAPHY

Författare

Toon Bosmans

Chalmers, Kemi- och bioteknik, Polymerteknologi

Agnes Stépán

Chalmers, Kemi- och bioteknik, Polymerteknologi

Guillermo Toriz Gonzalez

Chalmers, Kemi- och bioteknik, Polymerteknologi

S. Renneckar

Virginia Polytechnic Institute and State University

E. Karabulut

Kungliga Tekniska Högskolan (KTH)

L. Wagberg

Kungliga Tekniska Högskolan (KTH)

Paul Gatenholm

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Polymerteknologi

Biomacromolecules

1525-7797 (ISSN) 1526-4602 (eISSN)

Vol. 15 924-930

Ämneskategorier

Kemiteknik

Polymerteknologi

DOI

10.1021/bm4017868