Poly (N-vinyl-2-pyrrolidone) hydrogels produced by Fenton reaction

被引：49
|
作者：
Barros, J. A. G. [1 ]
Fechine, G. J. M. [1 ]
Alcantara, M. R. [1 ]
Catalani, L. H. [1 ]
机构：
[1] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo, Brazil
来源：
POLYMER | 2006年 / 47卷 / 26期
基金：
巴西圣保罗研究基金会;
关键词：
hydrogel; Fenton reaction; instantaneous gel;
D O I：
10.1016/j.polymer.2006.10.033
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
'Instantaneous' hydrogels from poly(N-vinyl-2-pyrrolidone) aqueous solutions can be produced using Fenton reagents, i.e., a redox reaction. A firm hydrogel is formed within 5-10 s, with a total gelling time below 8 min. Hydroxyl radical is recognized as the possible high energy intermediate responsible for the crosslinking reactions. The major variables of the process (PVP, H2O2 and Fe2+ initial concentrations, as well as pH) were examined and shown to operate within a rather narrow working window. The process efficiency and the properties of the hydrogel formed are discussed and compared with other methods of hydrogel production. (c) 2006 Elsevier Ltd. All rights reserved.
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页码：8414 / 8419
页数：6
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