Swelling kinetics of modified poly(vinyl alcohol) hydrogels

被引：23
|
作者：
Kim, SJ
Lee, KJ
Kim, IY
Lee, YM
Kim, SI [1 ]
机构：
[1] Hanyang Univ, Dept Biomed Engn, Seoul, South Korea
[2] Hanyang Univ, Sch Chem Engn, Seoul, South Korea
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2003年 / 90卷 / 12期
关键词：
hydrogel; swelling; PVA; interpenetrating polymer network (IPN);
D O I：
10.1002/app.13076
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Interpenetrating polymer network (IPN) hydrogels composed of poly(vinyl alcohol) (PVA) and monomer, N-isopropylacrylamide (NIPAAm), diallyldimethylammonium. chloride (DADMAC), or methacrylic acid (MAA) were prepared by using the sequential-IPN method. The equilibrium swelling ratios of PVA/NIPAAm (VANP), PVA/DADMAC (VADC), and PVA/MAA (VAMA) are 412, 370, and 297 at 25degreesC, respectively. VANP had the highest swelling ratio in time-dependent swelling behavior, whereas the swelling ratio of VAMA had the lowest. The n values of VANP, VADC, and VAMA are 0.72, 0.81, and 0.96, respectively. Transport of all IPN hydrogels is anomalous and their transport mechanisms are dominated by a combination of diffusion-controlled and relaxation-controlled systems. VAMA has the highest activation energy and VANP has the lowest activation energy. The values of all IPN hydrogels are from 4.66 to 16.49 kJ/mol, which proves that all IPN hydrogels are hydrophilic. (C) 2003 Wiley Periodicals, Inc.
引用
收藏
页码：3310 / 3313
页数：4
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