The use of polymeric amines to enhance the mechanical properties of lignocellulosic fibrous networks
2012 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 19, no 4, 1437-1447 p.Article in journal (Refereed) Published
Cationic polyelectrolytes (polyallylamine and polyvinylamine with different molecular masses) were adsorbed onto lignocellulosic fibres from unbleached and unbeaten spruce chemical fibres with different kappa numbers to investigate the effects on the mechanical properties of the final paper materials. Adsorption isotherms were first established to determine the maximum quantity of polymer that could be adsorbed onto each type of fibre. Paper sheets were then made with different amounts of added polyelectrolyte, and the structural and mechanical properties of the sheets were investigated, as well as the effect of an extra heating. The use of fibres with different kappa numbers led to different responses in terms of adsorption, and thus to differences in the mechanical properties of the resulting sheets. The tensile strength index was significantly increased (almost 50 % improvement in the best case) as a consequence of this polyelectrolyte adsorption onto the fibres, even at as low an adsorption level as 2 mg/g. The heating of paper sheets for 10 min at 160 A degrees C was also shown to improve the tensile strength index by about 10 % for pulps with high kappa number.
Place, publisher, year, edition, pages
2012. Vol. 19, no 4, 1437-1447 p.
Polyelectrolyte adsorption, Polyallylamine, Polyvinylamine, Dry strength, Unbleached chemical fibres
Textile, Rubber and Polymeric Materials
IdentifiersURN: urn:nbn:se:kth:diva-98915DOI: 10.1007/s10570-012-9712-6ISI: 000305236900034ScopusID: 2-s2.0-84862250391OAI: oai:DiVA.org:kth-98915DiVA: diva2:540919
QC 201507162012-07-122012-07-052015-07-16Bibliographically approved