Jump to main content
Jump to site search

Issue 8, 2013
Previous Article Next Article

Improvement of nanofibrillation efficiency of α-chitin in water by selecting acid used for surface cationisation

Author affiliations

Abstract

Aqueous dispersions of partially deacetylated α-chitin (PDACh) were prepared using various organic and inorganic acids in water under various pH and ionic strength conditions. The degree of PDACh nanofibrillation in the dispersions was investigated by measuring their light transmittances, nanofibrillation yields, and zeta-potentials, and by atomic force microscopy observations. Highly transparent dispersions, consisting of mostly individualized PDACh nanofibrils (φ = 3.4 ± 1.5 nm), were obtained when ascorbic acid and certain monovalent acids were used in water at pH 3.5. However, unfibrillated PDACh bundles were present in dispersions prepared with divalent and trivalent acids, probably because of formation of ionic cross-linkages between PDACh fibrils. When the acid concentration in the dispersions was adjusted to 0.04 M, those with higher dispersion pH exhibited higher nanofibrillation efficiency. Addition of excess acid inhibited efficient nanofibrillation of PDACh, owing to the high ionic strength that concomitantly occurred.

Graphical abstract: Improvement of nanofibrillation efficiency of α-chitin in water by selecting acid used for surface cationisation

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Sep 2012, accepted on 10 Dec 2012 and first published on 11 Dec 2012


Article type: Paper
DOI: 10.1039/C2RA22271J
Citation: RSC Adv., 2013,3, 2613-2619
  •   Request permissions

    Improvement of nanofibrillation efficiency of α-chitin in water by selecting acid used for surface cationisation

    Z. Qi, Y. Fan, T. Saito, H. Fukuzumi, Y. Tsutsumi and A. Isogai, RSC Adv., 2013, 3, 2613
    DOI: 10.1039/C2RA22271J

Search articles by author

Spotlight

Advertisements