Periodate oxidation of xylan-based hemicelluloses and its effect on their thermal properties
Journal article, 2018

Hemicellulose from pulp mill process water and crop residuals from food production often end up in waste streams or burnt for energy contribution. These waste products contain valuable biopolymers but lack many attributes needed for use in applications such as food and medical or consumer products. This study reports on an investigation of the periodate oxidation of hardwood xylan and arabinoxylan (AX) from wheat bran to produce materials with new functionalities. The study explores how to control the oxidation degree and describes structural differences between the two xylan-based polymers. For the xylan samples, the oxidation resulted in a lowering of the glass transition temperature (Tg), indicating a more flexible chain due to ring-opening of the xylan anhydro-sugar units. For the AX samples, the arabinose side-groups were instead oxidized, hindering oxidation on part of the xylose units, which resulted in a crosslinked network with an unchanged Tgbut reduced intrinsic viscosity.

Arabinoxylan

Periodate oxidation

Dialdehyde

Glass transition temperature (T ) g

Xylan

Polymer flexibility

Author

Mikaela Börjesson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Anette Larsson

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

Gunnar Westman

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry

Anna Ström

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 202 280-287

Subject Categories

Polymer Chemistry

Food Science

Polymer Technologies

Areas of Advance

Production

Materials Science

DOI

10.1016/j.carbpol.2018.08.110

More information

Latest update

12/10/2018