Strengthening wood fiber networks by adsorption of complexes of chitosan with dialdehyde starch

Markus H. J. Korhonen*, Gisela Cunha, Raili Koponen, Kirsi Hirvonen, Orlando J. Rojas

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Two biopolymers were applied to wood fibers suspended in aqueous media under conditions typical of industrial fiber processing units. Adsorption of the biopolymers, which were added as a pre-formed complex, endowed enhanced network strength upon wet-laying in papermaking. A significant effect in the dry strength of the resultant paper (up to 100 % increase) was recorded. Remarkably, this gain in strength was achieved while maintaining a low water absorption capacity (as measured by the water retention value) and also resulted in an enhanced wet strength. The proposed approach represents a promising alternative since it comprises bio-based polymers that are non-toxic and perform under industrially-relevant conditions.

Original languageEnglish
Pages (from-to)683-690
Number of pages8
JournalNordic Pulp & Paper Research Journal
Volume32
Issue number4
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Chitosan
  • Dialdehyde starch
  • Renewable
  • Strength
  • Fiber networks
  • WET-STRENGTH
  • PAPER
  • CELLULOSE
  • FILMS
  • CHITIN

Cite this