Influence of some reactional parameters on the substitution degree of biopolymeric Schiff bases prepared from chitosan and salicylaldehyde

Guinesi, Luciana Simionatto; Cavalheiro, Eder Tadeu Gomes

Advanced search

Search - Use quotation marks to get a more specific result

Index

Field of knowledge

Start date

Betweenand

(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of some reactional parameters on the substitution degree of biopolymeric Schiff bases prepared from chitosan and salicylaldehyde

Full text
Author(s):	Guinesi, Luciana Simionatto ^[1] ; Cavalheiro, Eder Tadeu Gomes Total Authors: 2
Affiliation:	^[1] Universidade de São Paulo (USP). Instituto de Química de São Carlos. Departamento de Química e Física Molecular - Brasil Total Affiliations: 2
Document type:	Journal article
Source:	Carbohydrate Polymers; v. 65, n. 4, p. 557-561, Sept. 2006.
Field of knowledge:	Physical Sciences and Mathematics - Chemistry
Abstract
Some reactional parameters as mol ratio (salicylaldehyde:free amino groups), reaction time and temperature were investigated in order to improve the substitution degree (DS) in the preparation of biopolymeric Schiff bases from chitosan. In this case, the reaction of chitosan and salicylaldehyde was used as a probe system in order to produce the Schiff base. The use of 50% (mol/mol) salicylaldehyde excess, reaction time of 18 h and temperature of 55 °C permitted to obtain a DS of 60% without evidences of hydrolysis of the biopolymeric matrix or changes in its acetylation degree. (AU)

Short URL