New features of arabinoxylan ethers revealed by using multivariate analysis
Journal article, 2019

© 2018 Hemicelluloses are a relatively unused renewable resource. One reason is their broad structure variety that makes it hard to understand structure-property relations. In this study arbinoxylan, extracted from barley husk, was chemically modified into hydroxypropyl methyl-, hydroxypropyl- and methyl arabinoxylan. The relationship between structure and phase behavior was investigated by using multivariate analysis. The arabinoxylan ethers were characterized using mid-infrared FTIR spectroscopy and from principal components analysis, PCA, structural or physical variations between samples were visualized. With orthogonal projections to latent structures, OPLS, vibrations specific for arabinoxylan hydroxypropyl and methyl substitutions was assigned. Among the observed differences between chemical derivatives was an intensity change in the water vibration. The differences in hydration were related to clouding phase behavior of the arabinoxylan ethers. This study shows that multivariate analysis methods are useful for finding unexpected and/or hidden features in the polysaccharide structure.

Arabinoxylan

Hemicelluloses

Methylation

FTIR

OPLS

Hydroxypropylation

Multivariate analysis

PCA

Author

Filip Nylander

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Physical Chemistry

Olof Svensson

AstraZeneca AB

Mats Josefson

AstraZeneca AB

Anette Larsson

SuMo Biomaterials

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Anette Larsson Group

Gunnar Westman

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 204 255-261

Foamed materials for packaging and absorbents based on forestry by-products

Formas, 2013-06-17 -- 2017-12-31.

Subject Categories

Inorganic Chemistry

Materials Chemistry

Other Chemistry Topics

DOI

10.1016/j.carbpol.2018.09.062

More information

Latest update

12/10/2018