Nanostructures of etherified arabinoxylans and the effect of arabinose content on material properties
Journal article, 2024

To further our understanding of a thermoplastic arabinoxylan (AX) material obtained through an oxidation-reduction-etherification pathway, the role of the initial arabinose:xylose ratio on the material properties was investigated. Compression molded films with one molar substitution of butyl glycidyl ether (BGE) showed markedly different tensile behaviors. Films made from low arabinose AX were less ductile, while those made from high arabinose AX exhibited elastomer-like behaviors. X-ray scattering confirmed the presence of nanostructure formation resulting in nano-domains rich in either AX or BGE, from side chain grafting. The scattering data showed variations in the presence of ordered structures, nano-domain sizes and their temperature response between AX with different arabinose contents. In dynamic mechanical testing, three transitions were observed at approximately −90 °C, −50 °C and 80 °C, with a correlation between samples with more structured nano-domains and those with higher onset transition temperatures and lower storage modulus decrease. The mechanical properties of the final thermoplastic AX material can therefore be tuned by controlling the composition of the starting material.

Thermoplasticity

Etherification

Mechanical properties

Wheat bran

Hemicellulose

Oxidation

Author

Ratchawit Janewithayapun

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

M. S. Hedenqvist

Royal Institute of Technology (KTH)

Fabrice Cousin

University Paris-Saclay

Alexander Idström

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Lars Evenäs

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Patricia Lopez-Sanchez

Universidade de Santiagode Compostela

Gunnar Westman

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry

Anette Larsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Anna Ström

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 331 121846

Unlocking the thermoplastic potential of polysaccharides

Formas (2020-01235), 2021-01-01 -- 2023-12-31.

Samband mellan arabinos innehåll och termiska och mekaniska egenskaper av filmer från modifierad arabinoxylan extraherad från vetekli

Lantmännens Forskningsstiftelse (2020H064), 2021-01-01 -- 2022-12-31.

Subject Categories

Chemical Engineering

Chemical Sciences

DOI

10.1016/j.carbpol.2024.121846

PubMed

38388051

More information

Latest update

2/16/2024