Strong reinforcing effects from galactoglucomannan hemicellulose on mechanical behavior of wet cellulose nanofiber gels

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Kasinee Prakobna, Victor Kisonen, Chunlin Xu, Lars A. Berglund
Publisher: SPRINGER
Publication year: 2015
Journal: Journal of Materials Science
Journal acronym: J MATER SCI
Volume number: 50
Issue number: 22
Start page: 7413
End page: 7423
Number of pages: 11
ISSN: 0022-2461
eISSN: 1573-4803


Abstract

Softwood hemicelluloses could potentially be combined with cellulose and used in packaging materials. In the present study, galactoglucomannan (GGM) is adsorbed to wood cellulose nanofibers (CNF) and filtered and dried or hot-pressed to form nanocomposite films. The CNF/GGM fibril diameters are characterized by AFM, and the colloidal behavior by dynamic light scattering. Mechanical properties are measured in uniaxial tension for wet gels, dried films, and hot-pressed films. The role of GGM is particularly important for the wet gels. The wet gels of CNF/GGM exhibit remarkable improvement in mechanical properties. FE-SEM fractography and moisture sorption studies are carried out to interpret the results for hygromechanical properties. The present study shows that GGM may find use as a molecular scale cellulose binding agent, causing little sacrifice in mechanical properties and improving wet strength.

Last updated on 2019-17-10 at 03:14