Periodate oxidation of xylan-based hemicelluloses and its effect on their thermal properties
Artikel i vetenskaplig tidskrift, 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

Glass transition temperature (T ) g

Dialdehyde

Polymer flexibility

Xylan

Författare

Mikaela Börjesson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Anette Larsson

Anette Larsson Group

Gunnar Westman

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Anna Ström

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 202 280-287

Ämneskategorier

Polymerkemi

Livsmedelsvetenskap

Polymerteknologi

Styrkeområden

Produktion

Materialvetenskap

DOI

10.1016/j.carbpol.2018.08.110

Mer information

Senast uppdaterat

2018-10-18