Physical properties of kraft pulp oxidized by hydrogen peroxide under mildly acidic conditions
Artikel i vetenskaplig tidskrift, 2022

The objective of this study is to gain further insight into the compositional and physical changes of kraft pulp caused by oxidation with hydrogen peroxide under acidic conditions. A softwood kraft pulp has been subjected to varying degrees of oxidation. Changes in the composition, as well as resulting physical properties of laboratory sheets were investigated. Findings indicated that the oxidation resulted in an increased carbonyl group content, a decrease in intrinsic viscosity and a change in hemicellulose composition. The oxidized pulps were found to have a reduced water retention value and a slightly reduced tensile strength (4-11 % at the investigated conditions). However, a substantial increase in wet web tensile strength (6-23 %) and wet tensile strength (134-242 %) of the sheets was obtained. The sheets could easily be repulped and an increased wet strength maintained to a large extent, even after recycling of the sheets.

wet strength


hydrogen peroxide

kraft pulp

carbonyl groups


Axel Martinsson

Chalmers, Kemi och kemiteknik, Kemiteknik

Merima Hasani

Chalmers, Kemi och kemiteknik, Kemiteknik

Wallenberg Wood Science Center (WWSC)

Hans Theliander

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi och kemiteknik, Kemiteknik

Nordic Pulp and Paper Research Journal

0283-2631 (ISSN) 2000-0669 (eISSN)

Vol. 37 2 330-337



Pappers-, massa- och fiberteknik




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