N-methylene phosphonic chitosan.: Effect of preparation methods on its properties

被引：78
|
作者：
Ramos, VM
Rodríguez, NM
Díaz, MF
Rodríguez, MS
Heras, A
Agulló, E
机构：
[1] Univ Nacl Sur, Dept Quim, LIBAQ, RA-12538000 Bahia Blanca, Argentina
[2] Univ Nacl Sur, INIQO, Dept Quim, RA-12538000 Bahia Blanca, Argentina
[3] Univ Complutense, Fac Farm, Dept Quim Fis, Unidad RMN, E-28040 Madrid, Spain
来源：
CARBOHYDRATE POLYMERS | 2003年 / 52卷 / 01期
关键词：
phosphonomethylation; chitosan soluble derivative; N-methylene phosphonic chitosan; H-1; NMR; metal ions chelate;
D O I：
10.1016/S0144-8617(02)00264-3
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
N-methylene phosphonic chitosan is prepared from chitosan with different acetylation degrees and sources using three reaction times. The degree of substitution is not dependent on chitosan's source and degree of deacetylation but it depends on reaction time. Data are confirmed by H-1 NMR and FT-IR. A significant decrease of viscosity and molecular weight is observed due to derivatization. It is demonstrated that N-methylene phosphonate chitosan is a powerful chelating agent of transition metal and calcium ions. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：39 / 46
页数：8
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