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Photocontrol of Mechanical Properties of Pulp Fibers and Fiber‐to‐Fiber Bonds via Self‐Assembled Polysaccharide Derivatives
Author(s) -
Grigoray Olga,
Wondraczek Holger,
Daus Stephan,
Kühnöl Katrin,
Latifi Seyed Kourosh,
Saketi Pooya,
Fardim Pedro,
Kallio Pasi,
Heinze Thomas
Publication year - 2015
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400286
Subject(s) - materials science , ultimate tensile strength , pulp (tooth) , cellulose fiber , fiber , composite material , cationic polymerization , covalent bond , cellulose , chemical engineering , polymer chemistry , organic chemistry , chemistry , medicine , pathology , engineering
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 2π + 2π 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.