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Sustainable Surface Engineering of Lignocellulose and Cellulose by Synergistic Combination of Metal‐Free Catalysis and Polyelectrolyte Complexes
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
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2019 (English)In: Global Challenges, E-ISSN 2056-6646, Vol. 3, article id 1900018Article in journal (Refereed) Published
Abstract [en]

A sustainable strategy for synergistic surface engineering of lignocellulose and cellulose fibers derived from wood by synergistic combination of metal‐free catalysis and renewable polyelectrolyte (PE) complexes is disclosed. The strategy allows for improvement and introduction of important properties such as strength, water resistance, and fluorescence to the renewable fibers and cellulosic materials. For example, the “green” surface engineering significantly increases the strength properties (up to 100% in Z‐strength) of chemi‐thermomechanical pulp (CTMP) and bleached sulphite pulp (BSP)‐derived sheets. Next, performing an organocatalytic silylation with a nontoxic organic acid makes the corresponding lignocellulose and cellulose sheets hydrophobic. A selective color modification of polysaccharides is developed by combining metal‐free catalysis and thiol‐ene click chemistry. Next, fluorescent PE complexes based on cationic starch (CS) and carboxymethylcellulose (CMC) are prepared and used for modification of CTMP or BSP in the presence of a metal‐free catalyst. Laser‐scanning confocal microscopy reveals that the PE‐strength additive is evenly distributed on the CTMP and heterogeneously on the BSP. The fluorescent CS distribution on the CTMP follows the lignin distribution of the lignocellulosic fibers.

Place, publisher, year, edition, pages
2019. Vol. 3, article id 1900018
Keywords [en]
click chemistry, lignocellulose, metal‐free catalysis, selective fluorescent labeling, sustainable polyelectrolyte complex, synergistic surface engineering, water repellent
National Category
Materials Chemistry Organic Chemistry Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-37905DOI: 10.1002/gch2.201900018ISI: 000518818400001OAI: oai:DiVA.org:miun-37905DiVA, id: diva2:1375831
Available from: 2019-12-06 Created: 2019-12-06 Last updated: 2020-03-26Bibliographically approved

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Alimohammadzadeh, RanaOsong, Sinke H.Abbaszad Rafi, AbdolrahimDahlström, ChristinaCordova, Armando

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Alimohammadzadeh, RanaOsong, Sinke H.Abbaszad Rafi, AbdolrahimDahlström, ChristinaCordova, Armando
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Materials ChemistryOrganic ChemistryPaper, Pulp and Fiber Technology

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