Influence of TEMPO on preparation of softwood nanofibrils and their hydrogel network properties.

Autor: Baş Y; Department of Engineering Sciences and Mathematics, Materials Science, Wood and Bionanocomposites, Luleå University of Technology, 971 87 Luleå, Sweden. Electronic address: yagmur.bas@ltu.se., Berglund L; Department of Engineering Sciences and Mathematics, Materials Science, Wood and Bionanocomposites, Luleå University of Technology, 971 87 Luleå, Sweden. Electronic address: linn.berglund@ltu.se., Stevanic JS; RISE Research Institutes of Sweden, Bioeconomy and Health, Sustainable Materials and Packaging, 114 86 Stockholm, Sweden. Electronic address: jasna.stevanic@ri.se., Scheepers G; RISE Research Institutes of Sweden, Built Environment Division, 352 22 Växjö, Sweden. Electronic address: gerhard.scheepers@ri.se., Niittylä T; Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden. Electronic address: totte.niittyla@slu.se., Oksman K; Department of Engineering Sciences and Mathematics, Materials Science, Wood and Bionanocomposites, Luleå University of Technology, 971 87 Luleå, Sweden; Department of Mechanical & Industrial Engineering (MIE), University of Toronto, Toronto, ON M5S 3G8, Canada. Electronic address: kristiina.oksman@ltu.se.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2025 Jan 15; Vol. 348 (Pt A), pp. 122812. Date of Electronic Publication: 2024 Sep 29.
DOI: 10.1016/j.carbpol.2024.122812
Abstrakt: From an economic and environmental perspective, the use of less chemicals in the production of cellulose nanofibrils (CNFs) is advantageous. In this study, we investigated the oxidation (TEMPO/NaClO 2 /NaClO, pH 6.8) of softwood (SW) particles with varying amounts of TEMPO (16, 8 or 0 mg g -1 of wood). Following, TEMPO-oxidized SW nanofibrils (TO-SWNFs) were obtained by nanofibrillation and their size, morphology, and crystallite size were assessed. Hydrogel networks of TO-SWNFs were prepared and mechanical properties were measured in dH 2 O and phosphate buffered saline (PBS) to compare their performance for possible biomedical applications such as wound dressings. The results reveal that the presence of TEMPO is of importance for TO-SWNF network properties, presenting higher eq. H 2 O absorption (≈2500 %) and elongation at break (≈10 %) with good wet strength (≈180 kPa). In addition, a decrease in use of TEMPO catalyst from 16 to 8 mg g -1 of wood is possible, without detrimental effects on hydrogel network properties (dH 2 O absorption ≈ 2000 %, elongation at break ≈ 13 %, wet strength ≈ 190 kPa) related to applications as wound dressings.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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