| Location of ethanol in sodium dodecyl sulfate aggregates |
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| 作者姓名： | 刘天晴 于卫里 郭荣 |
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| 作者单位： | Department of Chemistry，College of Science，Yangzhou University，Yangzhou，Jiangsu 225002，China，Department of Chemistry，College of Science，Yangzhou University，Yangzhou，Jiangsu 225002，China，Department of Chemistry，College of Science，Yangzhou University，Yangzhou，Jiangsu 225002，China |
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| 基金项目： | Project (No. 29733110) suppored by the National Natural Science Foundation of China. |
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| 摘 要： | The hexagonal liquid crystalline phase of SDS (Sodium dode-cyl sulfate)/H2O system changes into lamellar liquid crystal and the effective length of surfactant molecule d0/2 in the lamellar liquid crystal decreases with the addition of ethanol. The micellar aggregation number N of SDS decreases and the micellar diffusion coefficient increases with the added ethanol. Under a constant concentration of SDS, the molecule number ratio of ethanol to SDS in the micelle increases with the concentration of ethanol and even exceeds 10 when ethanol concentration is 1. 085 mol/L. All these results show that ethanol, even though a short chain alcohol and soluble in water, can partly exist in the interphase of the amphiphilic aggregates showing some properties of co-surfactant.
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Location of ethanol in sodium dodecyl sulfate aggregates |
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| LIU,Tian-Qing YU,Wei-Li GUO,Rong.Location of ethanol in sodium dodecyl sulfate aggregates[J].Chinese Journal of Chemistry,2000,18(1):18-24. |
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| Authors: | LIU Tian-Qing YU Wei-Li GUO Rong |
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| Institution: | LIU,Tian-Qing YU,Wei-Li GUO,RongDepartment of Chemistry,College of Science,Yangzhou University,Yangzhou,Jiangsu 225002,China |
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| Abstract: | The hexagonal liquid crystalline phase of SDS (Sodium dode-cyl sulfate)/H2O system changes into lamellar liquid crystal and the effective length of surfactant molecule d0/2 in the lamellar liquid crystal decreases with the addition of ethanol. The micellar aggregation number N of SDS decreases and the micellar diffusion coefficient increases with the added ethanol. Under a constant concentration of SDS, the molecule number ratio of ethanol to SDS in the micelle increases with the concentration of ethanol and even exceeds 10 when ethanol concentration is 1. 085 mol/L. All these results show that ethanol, even though a short chain alcohol and soluble in water, can partly exist in the interphase of the amphiphilic aggregates showing some properties of co-surfactant. |
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| Keywords: | Ethanol hexagonal liquid crystal lamellar liquid crystal micelle aggregation number diffusion coefficient |
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