Master curve for concentration dependence of semi-dilute solution viscosity of chitosan homologues: the Martin equation

被引：28

作者：

Kasaai, MR

Charlet, G

Arul, J ^{[1
]}

机构：

[1] Univ Laval, Dept Food Sci & Nutr, Ste Foy, PQ G1K 7P4, Canada

[2] Univ Laval, Dept Chem, Ste Foy, PQ G1K 7P4, Canada

[3] Univ Laval, CERSIM, Ste Foy, PQ G1K 7P4, Canada

来源：

FOOD RESEARCH INTERNATIONAL | 2000年 / 33卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

chitosan; chitosan homologues; Martin constant; master curve; concentration dependence;

D O I：

10.1016/S0963-9969(00)00024-7

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The concentration dependence of solution viscosity of polymers is described by Martin equation up to moderate concentrations, and the equation constant provides a measure of polymer-polymer interactions in a given solvent. A set of chitosan homologues with degree of acetylation (DA) in the range of 17-25 % and intrinsic viscosity, [eta], in the range of 10.9-6.25 dlg(-1) were prepared by hydrolysis with HCl. Another set of chitosan fragments (DA of 22-26% and [eta] of 1.21-8.37 dlg(-1)) were prepared by oxidative scission with NaNO2. For the first set of chitosan homologues, the Martin constant, was found to be 37.8x 10(-2) in 0.25 M HAc/0.25 M NaAc, while for the second set of homologues in 0.1 M HAc/0.02 M NaCl, it was 15.0x 10(-2). This suggests that the later was a better solvent for chitosan. A linear master curve in the dilute and semi-dilute regimes (c[eta] of 1.0 to 9.0) was obtained to describe the concentration dependence of the flow behavior of chitosan. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：63 / 67

页数：5

共 20 条

[1]

Allan G, 1984, CHITIN CHITOSAN RELA, DOI DOI 10.1016/B978-0-12-780950-2.50013-7

[2]

Arai K., 1968, B TOKAI REGIONAL FIS, V56, P89

[3]

BIAGINI G, 1992, ADVANCES IN CHITIN AND CHITOSAN, P16

[4] ANTIFUNGAL ACTIVITY OF CHITOSAN ON POSTHARVEST PATHOGENS - INDUCTION OF MORPHOLOGICAL AND CYTOLOGICAL ALTERATIONS IN RHIZOPUS-STOLONIFER [J].