Modification of xylan via an oxidation–reduction reaction
Artikel i vetenskaplig tidskrift, 2022

Xylan is a biopolymer readily available from forest resources. Various modification methods, including oxidation with sodium periodate, have been shown to facilitate the engineering applications of xylan. However, modification procedures are often optimized for semicrystalline high molecular weight polysaccharide cellulose rather than for lower molecular weight and amorphous polysaccharide xylan. This paper elucidates the procedure for the periodate oxidation of xylan into dialdehyde xylan and its further reduction into a dialcohol form and is focused on the modification work up. The oxidation–reduction reaction decreased the molecular weight of xylan while increased the dispersity more than 50%. Unlike the unmodified xylan, all the modified grades could be solubilized in water, which we see essential for facilitating the future engineering applications of xylan. The selection of quenching and purification procedures and pH-adjustment of the reduction step had no significant effect on the degree of oxidation, molecular weight and only a minor effect on the hydrodynamic radius in water. Hence, it is possible to choose the simplest oxidation-reduction route without time consuming purification steps within the sequence.

Hydrodynamic radius

Solubilization

Molecular weight

Polysaccharides

Dialcohol xylan

Författare

Chonnipa Palasingh

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Koyuru Nakayama

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Felix Abik

Helsingin Yliopisto

Kirsi S. Mikkonen

Helsingin Yliopisto

Lars Evenäs

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Wallenberg Wood Science Center (WWSC)

Anna Ström

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Tiina Nypelö

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Wallenberg Wood Science Center (WWSC)

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 292 119660

Liberation and solution properties of wood hemicelluloses towards surface active molecules (HEMISURF).

SamNordisk Skogsforskning (SNS) (HEMISURF), 2019-01-01 -- 2021-12-31.

Oxiderad hemicellulosa för filmer och geler

Vetenskapsrådet (VR) (2017-05138), 2018-01-01 -- 2021-12-31.

Ämneskategorier

Polymerkemi

Pappers-, massa- och fiberteknik

Polymerteknologi

DOI

10.1016/j.carbpol.2022.119660

PubMed

35725206

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Senast uppdaterat

2023-03-30