Gelation and swelling behavior of semi-Interpenetrating Polymer Network hydrogels based on polyacrylamide and poly(vinyl alcohol)
Gelation and swelling behavior of semi-Interpenetrating Polymer Network hydrogels based on polyacrylamide and poly(vinyl alcohol)
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DOI：
10.1080/00222340802219412
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发表时间：
2008-01-01
影响因子：
1.4
通讯作者：
Rahmatpour, Ali
中科院分区：
文献类型：
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作者：
Aalaie, Jamal;Vasheghani-Farahani, Ebrahim;Rahmatpour, Ali
使用三乙酸铬通过溶液交联制备基于部分水解聚丙烯酰胺（HPAM）和聚（乙烯醇）（PVA）的新型半互穿聚合物网络（半IPN）水凝胶。研究了PVA含量对自来水和不同电解质溶液中凝胶过程和溶胀行为的影响。使用动态流变仪对凝胶行为的研究表明，半互穿网络凝胶的极限储能模量随着 PVA 含量的增加而降低。还发现增加 PVA 含量会增加损耗因子，表明该胶凝系统的粘性性能比弹性性能增加得更强烈。半互穿网络凝胶在自来水中的溶胀率随着PVA浓度的增加而降低。然而，与 HPAM 凝胶相比，半 IPN 凝胶在合成油藏水中表现出较低的盐敏感性系数。因此，它们是提高石油采收率应用的潜在良好候选者。
Novel semi-Interpenetrating Polymer Network (semi-IPN) hydrogels based on partially Hydrolyzed Polyacrylamide (HPAM) and Poly(Vinyl Alcohol) (PVA) were prepared by solution crosslinking using chromium triacetate. Effects of PVA content on the gelation process and swelling behavior in tap water and different electrolyte solutions were investigated. Study of the gelation behavior using dynamic rheometery showed that the limiting storage modulus of the semi-IPN gels decreased with increasing PVA content. It was also found that increasing the PVA content increases the loss factor, indicating that the viscous properties of this gelling system increase more strongly than the elastic properties. The swelling ratio of the semi-IPN gels in tap water decreased as the concentration of the PVA increased. However, the semi-IPN gels showed lower salt sensitivity factor in synthetic oil reservoir water as compared with HPAM gels. Therefore, they are potentially good candidates for enhanced oil recovery applications.