| 在NaCl溶液中以海藻酸钠为致孔剂制备快速温度响应型多孔聚(N-异丙基丙烯酰胺)水凝胶 |
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| 引用本文： | 张高奇,查刘生,梁伯润.在NaCl溶液中以海藻酸钠为致孔剂制备快速温度响应型多孔聚(N-异丙基丙烯酰胺)水凝胶[J].高分子学报,2009,0(7):633-637. |
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| 作者姓名： | 张高奇 查刘生 梁伯润 |
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| 作者单位： | 1. 浙江传化股份有限公司技术中心,杭州,311215
2. 东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海200051 |
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| 摘 要： | 用海藻酸钠为致孔剂,在NaCl水溶液中制备了多孔聚(N-异丙基丙烯酰胺)(PNIPAAm)水凝胶,分别用扫描电镜(SEM)和小角X光散射(SAXS)对PNIPAAm水凝胶的多孔结构进行了表征.结果发现,PNIPAAm水凝胶网络中的孔洞相互贯通,随着反应介质中NaCl浓度的增加,孔洞尺寸逐渐增大,孔洞排列越来越有序.相应地,PNIPAAm水凝胶的消溶胀速率随着反应介质中NaCl浓度的增加而提高.当NaCl浓度为0.6 mol/L时制备的PNIPAAm水凝胶,从室温处于平衡溶胀状态快速转移到45℃水介质中,1 min后凝胶的水保留率不足15%,4 min后消溶胀就达到平衡状态.
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| 关 键 词： | 聚(N-异丙基丙烯酰胺) 海藻酸钠 温敏性水凝胶 快速响应 多孔结构 |
| 收稿时间： | 2008-09-16 |
PREPARATION OF FAST TEMPERATURE RESPONSIVE POROUS POLY(N-ISOPROPYLACRYLAMIDE) HYDROGELS USING SODIUM ALGINATE AS PORE-MAKING AGENT IN SODIUM CHLORIDE SOLUTIONS |
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| ZHANG Gaoqi,ZHA Liusheng,LIANG Borun.PREPARATION OF FAST TEMPERATURE RESPONSIVE POROUS POLY(N-ISOPROPYLACRYLAMIDE) HYDROGELS USING SODIUM ALGINATE AS PORE-MAKING AGENT IN SODIUM CHLORIDE SOLUTIONS[J].Acta Polymerica Sinica,2009,0(7):633-637. |
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| Authors: | ZHANG Gaoqi ZHA Liusheng LIANG Borun |
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| Institution: | Zhejiang Transfar Co., Ltd, Technology Center, Hangzhou 311215, College of Material Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 200051 |
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| Abstract: | Porous poly(N-isopropylacrylamide)(PNIPAAm) hydrogels were prepared using sodium alginate(SA) as pore-making agent in aqueous NaCl solutions.The porous structure of the PNIPAAm hydrogels was confirmed by SEM and SAXS,and the results showed that the pores in the hydrogels were interconnected and their pore sizes were increased with the NaCl concentrations used in the polymerization media.Accordingly,the deswelling rates of the porous hydrogels were enhanced with the NaCl concentrations.The water retention ra... |
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| Keywords: | Poly(N-isopropylamide) Sodium alginate Temperature-sensitive hydrogel Fast response Porous structure |
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