Swelling behavior of semi‐interpenetrating polymer network hydrogels composed of poly(vinyl alcohol) and poly(acrylamide‐co‐sodium methacrylate)
Swelling behavior of semi‐interpenetrating polymer network hydrogels composed of poly(vinyl alcohol) and poly(acrylamide‐co‐sodium methacrylate)
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DOI：
10.1002/app.21849
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发表时间：
2005-10
影响因子：
3
通讯作者：
Y. M. Mohan;P. Murthy;J. Sreeramulu;K. Raju
中科院分区：
文献类型：
--
作者：
Y. M. Mohan;P. Murthy;J. Sreeramulu;K. Raju
采用半互穿网络法制备了聚乙烯醇(PVA)和丙烯酰胺-甲基丙烯酸钠共聚物(AAm-co-SMA)互穿网络水凝胶。以过硫酸铵/N，N，N1，N1-四甲基乙二胺(APS/TMEDA)为引发剂，N，N1-亚甲基双丙烯酰胺(MBA)为交联剂，在主体聚合物聚乙烯醇存在下，由丙烯酰胺和甲基丙烯酸钠的水溶液聚合制备了IPN水凝胶。详细考察了PVA、甲基丙烯酸钠、交联剂、引发剂、反应温度等反应条件对IPN溶胀行为的影响。结果表明，IPN水凝胶在不同反应条件下表现出不同的溶胀行为。为了验证IPN水凝胶的结构差异，用扫描电子显微镜(SEM)研究了交联剂浓度变化对IPN形态的影响。除了MBA，另外两种交联剂也被用于IPN的制备，以说明它们的溶胀现象的不同。研究了各IPN水凝胶的溶胀动力学、平衡水含量和水分传输机理。IPN水凝胶本质上是离子性质的，其溶胀行为受到环境条件的显著影响，如温度、离子强度和溶胀介质的pH。此外，还考察了它们在不同生理生物液中的溶胀行为。©2005威利期刊公司，应用理工学院杂志98：302-314,2005
Interpenetrating polymer network (IPN) hydrogels based on poly(vinyl alcohol) (PVA) and poly(acrylamide-co-sodium methacrylate) poly(AAm-co-SMA) were prepared by the semi IPN method. These IPN hydrogels were prepared by polymerizing aqueous solution of acrylamide and sodium methacrylate, using ammonium persulphate/N,N,N1,N1-tetramethylethylenediamine (APS/TMEDA) initiating system and N,N1-methylene-bisacrylamide (MBA) as a crosslinker in the presence of a host polymer, poly(vinyl alcohol). The influence of reaction conditions, such as the concentration of PVA, sodium methacrylate, crosslinker, initiator, and reaction temperature, on the swelling behavior of these IPNs was investigated in detail. The results showed that the IPN hydrogels exhibited different swelling behavior as the reaction conditions varied. To verify the structural difference in the IPN hydrogels, scanning electron microscopy (SEM) was used to identify the morphological changes in the IPN as the concentration of crosslinker varied. In addition to MBA, two other crosslinkers were also employed in the preparation of IPNs to illustrate the difference in their swelling phenomena. The swelling kinetics, equilibrium water content, and water transport mechanism of all the IPN hydrogels were investigated. IPN hydrogels being ionic in nature, the swelling behavior was significantly affected by environmental conditions, such as temperature, ionic strength, and pH of the swelling medium. Further, their swelling behavior was also examined in different physiological bio-fluids. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 302–314, 2005