Ionic conductivity of chitosan membranes

被引：259

作者：

Wan, Y ^{[1
]}

Creber, KAM ^{[1
]}

Peppley, B ^{[1
]}

Bui, VT ^{[1
]}

机构：

[1] Royal Mil Coll Canada, Dept Chem & Chem Engn, Kingston, ON K7K 7B4, Canada

来源：

POLYMER | 2003年 / 44卷 / 04期

关键词：

chitosan membrane; hydration; ionic conductivity;

D O I：

10.1016/S0032-3861(02)00881-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chitosan membranes with various degrees of deacetylation and different molecular weights (MW) were prepared by film casting with aqueous solutions of chitosan and acetic acid. Ultraviolet (UV) spectrometry and infrared (IR) spectrometry were used to determine the degree of deacetylation (DDA) of chitosan. The viscosity-average MW of chitosan was measured in an aqueous solvent system of 0.25 M CH3COOH/0.25 M CH3COONa. The intrinsic ionic conductivities of the hydrated chitosan membranes were investigated using impedance spectroscopy. It was found that the intrinsic ionic conductivity was as high as 10(-4) S cm(-1) after hydration for 1 h. The tensile strength and breaking elongation of the membranes were evaluated according to standard ASTM methods. The crystallinity and swelling ratio of the membranes were examined. A tentative mechanism for the ionic conductivity of chitosan membranes is also suggested. (C) 2002 Published by Elsevier Science Ltd.

引用

页码：1057 / 1065

页数：9

共 34 条

[1] SOLUTION PROPERTIES OF CHITOSANS - CONFORMATION AND CHAIN STIFFNESS OF CHITOSANS WITH DIFFERENT DEGREES OF N-ACETYLATION
ANTHONSEN, MW
VARUM, KM
SMIDSROD, O
[J]. CARBOHYDRATE POLYMERS, 1993, 22 (03) : 193 - 201
[2] ARSHADY R, 1996, FUNCTIONAL POLYMER S, P240
[3] BARENDRECHT B, 1993, FUEL CELL SYSTEM, P88
[4] IMPROVED METHOD FOR IR DETERMINATION OF THE DEGREE OF N-ACETYLATION OF CHITOSAN
BAXTER, A
DILLON, M
TAYLOR, KDA
ROBERTS, GAF
[J]. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 1992, 14 (03) : 166 - 169
[5] Ionic conductivity of proton exchange membranes
Beattie, PD
Orfino, FP
Basura, VI
Zychowska, K
Ding, JF
Chuy, C
Schmeisser, J
Holdcroft, S
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2001, 503 (1-2): : 45 - 56
[6] CHITOSAN AND MODIFIED CHITOSAN MEMBRANES .1. PREPARATION AND CHARACTERIZATION
BLAIR, HS
GUTHRIE, J
LAW, TK
TURKINGTON, P
[J]. JOURNAL OF APPLIED POLYMER SCIENCE, 1987, 33 (02) : 641 - 656
[7] Effects of chain flexibility of chitosan molecules on the preparation, physical, and release characteristics of the prepared capsule
Chen, RH
Tsaih, ML
Lin, WC
[J]. CARBOHYDRATE POLYMERS, 1996, 31 (03) : 141 - 148
[8] Gottesfeld S, 1997, ADV ELECTROCHEM SCI, V5, P195, DOI DOI 10.1002/9783527616794.CH4
[9] KASAAI MR, 1998, P 7 INT C CHIT CHIT, P421
[10] Kesting R.E., 1985, SYNTHETIC POLYM MEMB, V2nd

← 1 2 3 4 →