Galina Rodionovaa, Tsuguyuki Saitob, Marianne Lenesc, Øyvind Eriksenc, Øyvind Gregersena, Hayaka Fukuzumi b, Akira Isogaib.Â
a Department of Chemical Engineering,Norwegian University of Science and Technology, 7491 Trondheim, Norway.
b Graduate School of Agricultural and Life Sciences,The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
c Paper and Fibre Research Institute, 7491 Trondheim.
TEMPO-oxidized cellulose nanofibers (TOCN) were obtained from commercial Norway spruce and mixed Eucalyptus cellulose pulps using TEMPO/sodium bromide (NaBr)/sodium hypochlorite (NaClO) system at pH 10 and 22 oC. After reaction, the fibrillated TEMPO-oxidized celluloses were used for preparation of self-standing films and casting of laminate films on 50 Âµm thick polyethylene terephthalate. Significant differences between N. spruce and Eucalyptus TOCN were registered. The tensile strength of the films showed a maximum value for spruce samples oxidized with addition of 10 mmol g-1 of NaClO. Oxygen permeability decreased with increasing oxidation levels, being lower for Norway spruce TOCN compared to Eucalyptus.
Cellulose 19:705 – 711