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| 浊度法表征温敏性微凝胶体积的相转变行为 | |
| 引用本文： | 刘维俊,范娉萍,周丽绘,黄永民,彭昌军,刘洪来. 浊度法表征温敏性微凝胶体积的相转变行为[J]. 功能高分子学报, 2007, 20(4): 352-357,379 |
| 作者姓名： | 刘维俊 范娉萍 周丽绘 黄永民 彭昌军 刘洪来 |
| 作者单位： | 1. 华东理工大学化学系先进功能材料及其制备教育部重点实验室,上海,200237;上海应用技术学院化工系,上海,200235 2. 上海应用技术学院化工系,上海,200235 3. 华东理工大学化学系先进功能材料及其制备教育部重点实验室,上海,200237 |
| 基金项目： | 国家自然科学基金(20606010,20476025,20490200)，上海市教委资助项目(P1501) |
| 摘 要： | 以N-异丙基丙烯酰胺(NIPAM)、甲基丙烯酸(MAA)为单体,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,制备了温敏性聚(N-异丙基丙烯酰胺)(PNIPAM)和具有温度、pH敏感性的聚(N-异丙基丙烯酰胺-co-甲基丙烯酸)(PNIPAM-MAA)微凝胶。通过测定不同温度和pH条件下微凝胶浊度变化,表征微凝胶的温度及pH敏感性,描述了NaCl浓度和pH对微凝胶体积相转变温度的影响。同时,测定了微凝胶的临界聚沉浓度及临界絮凝温度,表征了微凝胶的稳定性,讨论了影响微凝胶的稳定性因素。 |
| 关 键 词： | N-异丙基丙烯酰胺 微凝胶 体积相转变 稳定性 |
| 文章编号： | 1008-9357（2007）04-0352-06 |
| 收稿时间： | 2007-05-21 |
| 修稿时间： | 2007-05-21 |
Volume Phase Transition Behavior and Stability of Temperature Sensitive Microgel by Turbidity Method |
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| LIU Wei-jun,FAN Ping-ping,ZHOU Li-hui,HUANG Yong-min,PENG Chang-jun,LIU Hong-lai. Volume Phase Transition Behavior and Stability of Temperature Sensitive Microgel by Turbidity Method[J]. Journal of Functional Polymers, 2007, 20(4): 352-357,379 | |
| Authors: | LIU Wei-jun FAN Ping-ping ZHOU Li-hui HUANG Yong-min PENG Chang-jun LIU Hong-lai |
| Abstract: | The thermo-sensitive and pH-responsive microgels were synthesized by soap-free polymerization,where N-isopropylacylamide and methacrylic acid as monomers,and N,N-methylenebisacrylamide as cross-linking agent.The thermoand pH-sensitivities of microgels were evaluated by measuring the relative turbidity of microgel aqueous dispersions under varying temperature and pH.Meanwhile,effects of salt concentration and pH value on the volume phase transition temperature of microgels were estimated.The colloidal stability of microgels was characterized by examining the critical coagulation concentration and the critical flocculation temperature.Factors about microgel stability were discussed. |
| Keywords: | N-isopropylacylamide microgel volume phase transition colloidal stability |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |