Rheological and swelling behavior of semi-interpenetrating networks of polyacrylamide and scleroglucan
Rheological and swelling behavior of semi-interpenetrating networks of polyacrylamide and scleroglucan
复制标题
DOI：
10.1002/pat.1369
复制
发表时间：
2009-12-01
影响因子：
3.4
通讯作者：
Vasheghani-Farahani, Ebrahim
中科院分区：
文献类型：
--
作者：
Aalaie, Jamal;Rahmatpour, Ali;Vasheghani-Farahani, Ebrahim
以三醋酸铬交联的硬葡聚糖溶液和部分水解聚丙烯酰胺（HPAM）为原料，制备了新型半互穿聚合物网络（semi-IPN）水凝胶。采用动态流变仪和溶胀实验分别研究了硬葡聚糖浓度对合成水凝胶成胶过程和在不同介质中溶胀行为的影响。振荡剪切流变学表明，半互穿网络凝胶的极限储能模量随硬葡聚糖浓度的增加而增加。结果还发现，半互穿网络凝胶的粘性能量耗散性能的凝胶化体系的交联剂浓度的增加而下降。此外，通过增加硬葡聚糖含量，损耗因子略微降低，表明该胶凝体系的粘性性质比其弹性性质降低更多。溶胀实验表明，半互穿网络的平衡溶胀比（ESR）随着硬葡聚糖含量的增加而降低，这是由于交联水凝胶中离子基团的减少。然而，与HPAM凝胶相比，半互穿网络凝胶在合成油藏水中显示出较低的盐敏感性。因此，这些半IPN水凝胶可以被认为是用于提高石油采收率（EOR）应用的潜在良好候选物。版权所有（C）2009约翰威利父子有限公司
Preparation and characterization of novel semi-interpenetrating polymer network (semi-IPN) hydrogels based on partially hydrolyzed polyacrylamide (HPAM) and scleroglucan solution crosslinked with chromium triacetate are described. Effects of scleroglucan concentration on the gelation process and swelling behavior of synthesized hydrogels in different media were investigated using dynamic rheometery and swelling tests, respectively. Oscillatory shear rheology showed that the limiting storage modulus of the semi-IPN gels increased with increase in scleroglucan concentration. It was also found that the viscous energy dissipating properties of the semi-IPN gels decreased with increase in the crosslinker concentration of the gelation system. In addition, the loss factor slightly decreased by increasing the scleroglucan content, indicating that the viscous properties of this gelling system decreased more than its elastic properties. The swelling tests showed that the equilibrium swelling ratio (ESR) of the semi-IPN networks decreased with increase in scleroglucan content, due to the decrease of ionic groups of polyelectrolyte hydrogel. However, the semi-IPN gels showed lower salt sensitivity in synthetic oil reservoir water as compared with HPAM gels. Therefore, these semi-IPN hydrogels may be considered potentially good candidates for enhanced oil recovery (EOR) applications. Copyright (C) 2009 John Wiley & Sons, Ltd.