| 李莎,韩梦,叶梦真,张骞,刘杰.化学通报,2018,81(8):753-758. |
| Aerosol-OT在水和聚乙二醇-200混合溶液中有序结构转变及影响因素研究 |
| Effects of Temperature and Surfactant Concentration on the Aggregation of Aerosol-OT in PEG-200 and Water Mixed Solvent |
| 投稿时间：2018-03-14 修订日期：2018-04-03 |
| DOI： |
| 中文关键词: 电导法 流变 温度 AOT PEG-200 |
| 英文关键词:Conductivity, Rheology, Temperature, AOT, PEG-200 |
| 基金项目:聊城大学博士基金(318051327)及聊城大学科技创新基金(201710447031, 201710447032)资助 |
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| 中文摘要: |
| 对表面活性剂双(2-乙基己基)琥珀酸酯磺酸钠 (Aerosol-OT或AOT)、水和聚乙二醇-200 (PEG-200)的体系，用电导、流变学方法等研究了温度和表面活性剂浓度对其有序结构的形成和转变的影响。结果发现在室温下，高AOT浓度溶液中出现凝胶结构。当AOT的浓度固定到400mmol/kg以上时，随着温度的升高，观察到体系外观从透明粘稠到稍浑浊再到透明黏度小的过程，结合AOT的双链结构并通过流变实验验证了网络结构的形成，推测该体系在微观上经历了从凝胶到囊泡再到胶束的转变过程；而当AOT的浓度在200到400mmol/kg之间时，随着温度的升高，出现了凝胶和胶束混合体系到胶束体系的转变过程。 |
| 英文摘要: |
| Conductivity and rheological properties of aggregated behaviors of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) in polyethylene glycol 200 (PEG 200) and water mixed solvent media are studied as a function of temperature and AOT concentration. The results show that the system appears network structure of gel at higher AOT concentration and at room temperature. For the system of AOT concentration over 400 mmol/kg, the solution is colorless, transparent and syrupy with no polarized behavior at low temperature, supposed the formation of gel; Then the solution changes a little turbid accompanied by the rapid increase of conductivity with increasing the temperature, indicating the appearance of vesicles; Temperature continues to rise, the solution changes transparent again. So, the AOT solution changes from gel to vesicles, and finally micelles as the temperature increases, and the process is reversible. While for the system of AOT concentration between 200 and 400 mmol/kg, the solution transforms from the coexisting system of gel-micelles to pure micelles system. |
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