| Microstructure and Phase Behavior of Cationic Gemini/Anionic Polyelectrolyte/Water Ternary System |
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| 作者姓名： | 皮瑛瑛 尚亚卓 彭昌军 刘洪来 |
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| 作者单位： | Dept. Chemistry and State Key Lab. Chem. Eng., East China Univ, Sci. ＆ Technol., Shanghai 200237, China |
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| 基金项目： | 中国科学院资助项目
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国家博士研究项目 |
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| 摘 要： | The microstructure of cationic gemini surfactant 1,6-bis(dodecyldimethylammonium) hexane dibromide C12H25(CH3)2N-(CH2)6-N(CH3)2C12H25×2Br] (12-6-12×2Br-) and oppositely charged polyelectrolyte poly(acrylic acid, sodium salt) (NaPA) in aqueous solution has been studied by using fluorescence, conductivity measurement, freeze-etching and TEM. The data obtained from fluorescence and conductivity measurement show that micelle-like or complex can form between the gemini surfactant (12-6-12×2Br-) and polyelectrolyte NaPA due to the static electric interaction and hydrophobic forces. Through freeze-etching and TEM, the microstructure of the mixture solution has been studied, which is consistent with the result from micropolarity. Comparing the fluorescence spectrum of system of dodecyltrimethylammonium bromide (DTAB) and NaPA with that of system of gemini surfactant (12-6-12×2Br-) and NaPA, it can be found that the interaction between gemini surfactant (12-6-12×2Br-) and NaPA is stronger than that between DTAB and NaPA. And the phase behavior of (12-6-12×2Br-) and NaPA in aqueous solution has also been detected. It can be shown that the precipitate will transform into gel in higher NaPA concentration.
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| 关 键 词： | gemini surfactant polyelectrolyte molecular interaction micropolarity micelle |
| 文章编号： | 1009-606X(2006)02-0296-06 |
| 修稿时间： | 2005年10月11 |
Microstructure and Phase Behavior of Cationic Gemini/Anionic Polyelectrolyte/Water Ternary System |
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| PI Ying-ying,SHANG Ya-zhuo,PENG Chang-jun,LIU Hong-lai.Microstructure and Phase Behavior of Cationic Gemini/Anionic Polyelectrolyte/Water Ternary System[J].Chinese Journal of Process Engineering,2006,6(2):296-301. |
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| Authors: | PI Ying-ying SHANG Ya-zhuo PENG Chang-jun LIU Hong-lai |
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| Abstract: | The microstructure of cationic gemini surfactant 1,6-bis(dodecyldimethylammonium) hexane dibromide C12H25(CH3)2N-(CH2)6-N(CH3)2C12H25·2Br] (12-6-12·2Br-) and oppositely charged polyelectrolyte poly(acrylic acid,sodium salt) (NaPA) in aqueous solution has been studied by using fluorescence, conductivity measurement, freeze-etching and TEM. The data obtained from fluorescence and conductivity measurement show that micelle-like or complex can form between the gemini surfactant (12-6-12.2Br-) and polyelectrolyte NaPA due to the static electric interaction and hydrophobic forces. Through freeze-etching and TEM, the microstructure of the mixture solution has been studied, which is consistent with the result from micropolarity. Comparing the fluorescence spectrum of system of dodecyltrimethylammonium bromide (DTAB) and NaPA with that of system of gemini surfactant (12-6-12.2Br-) and NaPA, it can be found that the interaction of (12-6-12.2Br-) and NaPA in aqueous solution has also been detected. It can be shown that the precipitate will transform into gel in higher NaPA concentration. |
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| Keywords: | gemini surfactant polyelectrolyte molecular interaction micropolarity micelle |
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