Structural diversity of chitosan and its complexes

被引：133

作者：

Okuyama, K ^{[1
]}

Noguchi, K

Kanenari, M

Egawa, T

Osawa, K

Ogawa, K

机构：

[1] Tokyo Univ Agr & Technol, Fac Technol, Koganei, Tokyo 1848588, Japan

[2] Univ Osaka Prefecture, Adv Sci & Technol Res Inst, Sakai, Osaka 5998570, Japan

来源：

CARBOHYDRATE POLYMERS | 2000年 / 41卷 / 03期

关键词：

chitosan structure; chitosan complex with acid or metal salt; fiber diffraction;

D O I：

10.1016/S0144-8617(99)00142-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The lattice parameters for a number of chitosan specimens were classified into two, hydrated and anhydrous, groups. Polymers in them have the same extended two-fold helical structure, while the packing arrangements and water contents are quite different. Chitosan complexes with acid or metal salts can be classified into two types. Type I has a 10.3 Angstrom axial repeat similar to hydrated and anhydrous chitosan, while Type II has a 40 Angstrom axial repeat; by using X-ray data from highly oriented specimens, plausible crystal structures have been obtained in each case. The Type II conformation corresponds to a less-extended two-fold helical model with a tetrasaccharide repeat in a helical asymmetric unit. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：237 / 247

页数：11

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