Photocontrol of mechanical properties of pulp fibers and fiber-to-fiber bonds via self-assembled polysaccharide derivatives

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Olga Grigoray, Holger Wondraczek, Stephan Daus, Katrin Kühnöl, Seyed Kourosh Latifi, Pooya Saketi, Pedro Fardim, Pasi Kallio, Thomas Heinze
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 2015
Journal: Macromolecular Materials and Engineering
Journal acronym: MACROMOL MATER ENG
Volume number: 300
Issue number: 3
Start page: 277
End page: 282
Number of pages: 6
ISSN: 1438-7492
eISSN: 1439-2054


Abstract

Photoresponsive pulp fibers are prepared by self-assembly of photoactive cationic cellulose derivatives with pulp fibers in aqueous environment. Photoactive groups of the derivatives undergo 2 pi + 2 pi cycloaddition reaction under UV-light irradiation. Fast photocrosslinking leads to the formation of the covalent bonds between the photoactive groups on the fiber surfaces. This results in drastic enhancement of the mechanical properties of the fiber network. Tensile strength and Z-directional tensile strength increase by 81 and 84% compared to the original fiber network. Stiffness of the individual fibers increases by 60%. Such concept of controlling mechanical properties of the fiber materials by the light gives a possibility to design smart bio-based materials and to increase end value of the fiber products.


Keywords

bonding, fiber modification, mechanical properties, photoresponsive pulp fibers

Last updated on 2019-23-07 at 04:34