| UNIQUAC法预报N-异丙基丙烯酰胺凝胶在乙醇水溶液中的溶胀行为 |
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| 引用本文： | 许小平,HüTHER Andreas,MAURER Gerd.UNIQUAC法预报N-异丙基丙烯酰胺凝胶在乙醇水溶液中的溶胀行为[J].计算机与应用化学,2003,20(6):783-788. |
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| 作者姓名： | 许小平 HüTHER Andreas MAURER Gerd |
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| 作者单位： | 1. 福州大学化学化工学院,福建,福州,350002
2. Lehrstuhl für Technische Thermodynamik, Universitat Kaiserslau-tern Postfach 3049, 67663 Kaiserslautern, Germany |
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| 基金项目： | 德国科学基金,国家教委留学人员启动基金(HX2001),福建省科技厅(2001Z046),福建省科技三项(K2001004),福州大学科技发展基金(XJY00-08),福州大学启动基金(XKJ(QD)-0111)资助项目 |
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| 摘 要： | 以N-异丙基丙烯酰胺(NIPAAm)为单体,合成了NIPAAm均聚凝胶。研究了25℃时它们在乙醇水溶液中的溶胀平衡。实验发现：当乙醇浓度约为12％时,少量乙醇的进一步加入将使溶涨的凝胶突然剧烈收缩,表明NIPAAm凝胶在乙醇水溶液中有不连续体积相变。随着乙醇不断加入,凝胶又重新溶涨。结合“自由体积”概念,利用UNIQUAC模型的关联和预报了NIPAAm凝胶在乙醇-水溶液中的这种溶涨行为。
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| 关 键 词： | UNIQUAC法 N-异丙基丙烯酰胺 凝胶 制备 乙醇水溶液 溶胀行为 |
| 文章编号： | 1001-4160(2003)06-783-788 |
| 修稿时间： | 2003年3月21日 |
Predicting the swelling behavior of N-isopropylacrylamide gels in ethanol-water mixtures with UNIQUAC |
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| MAURER Gerd.Predicting the swelling behavior of N-isopropylacrylamide gels in ethanol-water mixtures with UNIQUAC[J].Computers and Applied Chemistry,2003,20(6):783-788. |
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| Authors: | MAURER Gerd |
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| Abstract: | N - isopropylacrylamide ( NIPAAm) was used to synthesize NIPAAm homopolymer. The swelling behavior of gel
was investigated in aqueous solution of ethanol with concentration ranging from 0 to 100 mass-percentage at 25C. The results demonstrated that the swollen gel in water shrank first with the addition of a small amount of ethanol and then reswelled with further addition of ethanol showing the gel underwent a discontinuous volume phase transition in aqueous solution at ethanol. A thermodynamic model based on the UNIQUAC with the "free-volume" contribution was applied to correlate anr' predict the swelling behavior of the N - isopropylacrylamide gels in ethanol-water mixture. The results correlated and predicted by the model are consist good with the experimental data. |
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| Keywords: | hydrogel swelling poly( N - isopropylacrylamide) model |
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