Physicochemical and chemical characterisation of chitosan in dilute aqueous solution

Berth, Gisela; Cölfen, Helmut; Dautzenberg, Herbert

Physicochemical and chemical characterisation of chitosan in dilute aqueous solution

Dateien

Zu diesem Dokument gibt es keine Dateien.

Datum

2002

Autor:innen

Berth, Gisela

Cölfen, Helmut

Dautzenberg, Herbert

DOI (zitierfähiger Link)

https://doi.org/10.1007/3-540-44672-9_8

Sammlungen

Chemie

Publikationstyp

Beitrag zu einem Konferenzband

Publikationsstatus

Published

Erschienen in

BORCHARD, W., ed., A. STRAATMANN, ed.. Analytical Ultracentrifugation VI. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002, pp. 50-57. Progress in Colloid and Polymer Science. 119. ISBN 978-3-540-42489-5. Available under: doi: 10.1007/3-540-44672-9_8

Zusammenfassung

Static and dynamic light scattering as well as analytical ultracentrifugation and viscosity measurements were used to investigate the chain conformation of chitosans in salt-containing solutions (pH 4.5; ionic strength about 0.12 M). The samples of various degrees of acetylation were chemically homogeneous. The molecular-weight dependence of the radius of gyration has given clear evidence for a relatively flexible wormlike chain with a persistence length of about 6 nm irrespective of the degree of acetylation, where excluded-volume effects and the polydispersity of the samples were taken into account. In contrast, the interpretation of the hydrodynamic data via a “whole-body approach” according to the Wales-van Holde ratio suggested a strongly elongated chain conformation. The failure of the latter to properly reflect the chain conformation was ascribed to the high extent of draining. A nearly free-draining case can also account for the high scaling exponent of the relationship between intrinsic viscosity and molecular mass.

Fachgebiet (DDC)

540 Chemie

Konferenz

Symposium on Analytical Ultracentrifugation, 1. März 2001 - 2. März 2001, Duisburg

Zitieren

ISO 690

BERTH, Gisela, Helmut CÖLFEN, Herbert DAUTZENBERG, 2002. Physicochemical and chemical characterisation of chitosan in dilute aqueous solution. Symposium on Analytical Ultracentrifugation. Duisburg, 1. März 2001 - 2. März 2001. In: BORCHARD, W., ed., A. STRAATMANN, ed.. Analytical Ultracentrifugation VI. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002, pp. 50-57. Progress in Colloid and Polymer Science. 119. ISBN 978-3-540-42489-5. Available under: doi: 10.1007/3-540-44672-9_8

BibTex

@inproceedings{Berth2002Physi-40691,
  year={2002},
  doi={10.1007/3-540-44672-9_8},
  title={Physicochemical and chemical characterisation of chitosan in dilute aqueous solution},
  number={119},
  isbn={978-3-540-42489-5},
  publisher={Springer Berlin Heidelberg},
  address={Berlin, Heidelberg},
  series={Progress in Colloid and Polymer Science},
  booktitle={Analytical Ultracentrifugation VI},
  pages={50--57},
  editor={Borchard, W. and Straatmann, A.},
  author={Berth, Gisela and Cölfen, Helmut and Dautzenberg, Herbert}
}

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