Conductivity of aqueous solutions of low-molecular chitosan

被引：14

作者：

Bobreshova, OV

Bobylkina, OV

Kulintsov, PI

Bobrinskaya, GA

Varlamov, VP

Nemtsev, SV

机构：

[1] Voronezh State Univ, Voronezh 394006, Russia

[2] Russian Acad Sci, Bioinzheneriya Ctr, Russian Chitin Soc, Moscow, Russia

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2004年 / 40卷 / 07期

关键词：

chitosan; solution conduction; counterions; activation energy for conduction;

D O I：

10.1023/B:RUEL.0000035250.54523.e8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Solutions of chitosan with molecular weight (MW) of similar to20000, similar to9600, and similar to3700 Da are studied conductimetrically and viscosimetrically. The dependence of solution conductivity on the chitosan concentration begins to deviate from linearity simultaneously with an abrupt increase in the solution viscosity starting from concentrations of 20-30 g l(-1). The fraction of free counterions (Cl-, CH3COO-) in the 0.1 g-equiv l(-1) chitosan solutions significantly depends on the sample's MW. The charge is transferred in solutions predominantly by chloride and acetate ions, with the high-MW cation barely contributing to conduction.

引用

页码：694 / 697

页数：4