| 黄原胶存在时十四烷基甜菜碱的聚集行为 |
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| 引用本文： | 陈爱民,徐桂英,杨延莲,张莉,沈强. 黄原胶存在时十四烷基甜菜碱的聚集行为[J]. 日用化学工业, 2001, 31(1): 1-4 |
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| 作者姓名： | 陈爱民 徐桂英 杨延莲 张莉 沈强 |
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| 作者单位： | 山东大学胶体与界面化学教育部重点实验室, |
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| 基金项目： | 国家自然科学基金资助项目(29973023) |
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| 摘 要： | 通过表面张力和稳态荧光光谱的测定 ,探讨了黄原胶 (XC)存在时十四烷基甜菜碱 (C14 BE)的聚集作用。结果表明 ,少量XC存在时 ,有利于C14 BE在溶液表面上聚集 ,从而提高了C14 BE降低水表面张力的效率。XC含量较大时 ,C14 BE与XC在 [C14 BE]
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| 关 键 词： | 黄原胶 十四烷基甜菜碱 疏水因子 平均聚集数 临界聚集浓度 两性表面活性剂 |
| 文章编号： | 1001-1803(2001)01-0001-04 |
| 修稿时间： | 2000-06-15 |
The Aggregation Behavior of Tetradecylbetane in the Presence of Xanthan |
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| CHEN Ai-min,XIU Gui-ying,YANG Yan-lian,ZHANG Li,SHEN Qiang. The Aggregation Behavior of Tetradecylbetane in the Presence of Xanthan[J]. China Surfactant Detergent & Cosmetics, 2001, 31(1): 1-4 |
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| Authors: | CHEN Ai-min XIU Gui-ying YANG Yan-lian ZHANG Li SHEN Qiang |
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| Affiliation: | CHEN Ai-Min Xiu Gui-ying~ YANG Yan-Lian ZHANG Li SHEN Qiang |
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| Abstract: | The aggregation behavior of tetradecylbetane (C14 BE) in the presence of Xanthan (XC) has been investigated by methods of surface tension and fluorescentce probe techniques. The results indicate that the surface activity was enhanced in the presence of XC when the [C14BE] ＜ cmc. But the mean aggregation number N of C14BE micelles decreases when the concentration of XC increased and the” hydrophobic index”, I1/I3, was not decreased when the [ C14BE] = 0.01 mol· dm-3. This most likely due to the interaction between the molecules of XC and C14 BE. The C14 BE - XC aggregates are formed at a critical aggregation concentration (cac), which is lower than the cmc of C14BE solution. It is shown that the aggregation of C14BE molecules is easier in the presence of XC. |
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| Keywords: | XC(Xanthan) C_14BE(tetradecylbetane) hydrophobic index mean aggregation number critical aggregation concentration |
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