CHITOSAN DEPOLYMERISATION BY POTASSIUM PERIODATE

Authors

  • Cristóbal Lárez Velásquez
  • Leonardo Zambrano Díaz

Abstract

Chitosan degradation with potassium periodate was studied in well controlled aqueous conditions (acetic acid (0.3M)/sodium acetate (0,2M) buffer and 25ºC) in order to establish the preferential process occurring during the initial stages of the reaction. Depolymerization of the polysaccharide through of the hydrolysis of glucosidic bonds seen to be the principal reaction due to FTIR spectra of the reacted samples did not show appreciable changes but their viscosity and gpc traces indicate a pronounced molecular weight decreasing. Additionally, a kinetic study was also carried out - employing viscosimetric data (Sano´s equation) and the initial velocity approach - giving as result the following equation for the depolymerization apparent velocity: v = 1.878[chitosan]1,40[IO4-]0,65

Downloads

Download data is not yet available.

Downloads

Published

2011-04-19

How to Cite

Lárez Velásquez, C., & Zambrano Díaz, L. (2011). CHITOSAN DEPOLYMERISATION BY POTASSIUM PERIODATE. LatinAmerican Journal of Metallurgy and Materials, 195–202. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/170

Issue

2011, 31(2)

Section

Regular Articles

License

The authors of papers accepted for publication by the RLMM, should recognize the complete transfer of copyright (in all languages) to the RLMM. This transfer includes the right by the RLMM to adapt the article for digital or printed reproduction without altering the written content and information displayed in tables or figures within. The authors retain the copyright and guarantee the journal the right to be the first publication of the work as well as licensed under a Creative Commons Attribution License 4.0 Internacional (CC BY 4.0) which allows others to share the work with an acknowledgment of the authorship of the work and the initial publication in this journal.