Prediction of Swelling Behavior of AT-Isopropylacrylamide Hydrogels in Aqueous Solution of Sodium Ch

• 作 者: 许小平 李忠琴 黄兴华 王绪绪 付贤智 HütherAndreas MaurerGerd
• 机 构: Department of Chemical Engineering, Fuzhou University, Fuzhou 350002, China,Department of Chemical E
• 出 处: Chinese Journal of Chemical Engineering
• 发表日期: 2004年03期
• 关键词: Prediction swelling polymerization partition solute coexisting Sodium behaviour

In this paper, a model is presented to correlate and predict the swelling behavior of hydrogels in aqueous solutions of electrolytes. The model is a combination of VERS-model, “phantom network” theory and “free-volume” contribution. The VERS-model is used to calculate Gibbs excess energy; “phantom network” theory to describe the elastic properties of polymer network, and “free-volume” contribution to account for additional difference in the size of the species. To test the model, a series of N-isopropylacrylamide based hydrogels are synthesized by free radical polymerization in oxygen-free, deionized water at 25℃ under nitrogen atmosphere. Then, the degree of swelling of all investigated gels as well as the partition of the solute between the gel phase and the surrounding coexisting liquid phase are measured in aqueous solution of sodium chloride. The model test demonstrates that the swelling behavior correlated and predicted by the model agrees with the experimental data within the experimental uncert

In this paper, a model is presented to correlate and predict the swelling behavior of hydrogels in aqueous solutions of electrolytes. The model is a combination of VERS-model, “phantom network ” theory and “free-volume ” contribution. The VERS-model is used to calculate Gibbs excess energy; “phantom network ” theory to describe the elastic properties of polymer network, and “free-volume ” contribution to account for additional difference in the size of the species. To test the model, a series of N-isopropylacrylamide based hydrogels were synthesized by free radical polymerization in oxygen-free, deionized water at 25 ° C under nitrogen atmosphere. Then, the degree of swelling of all investigated gels as well as the partition of the solute between the gel phase and the surrounding coexisting liquid phase are measured in aqueous solution of sodium chloride. The model test demonstrates that the swelling behavior correlated and predicted by the model agrees with the experimental data wit hin the experimental uncert