| Interaction between dodecyl oxypropyl β-hydroxyltrimethylammonium bromide and Xanthan: MesoDyn simulation and binding isotherm measurements |
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| 作者姓名： | LI YiMing XU GuiYing CHEN AiMin DONG ShuLi YUAN ShiLing |
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| 作者单位： | Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100, China |
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| 基金项目： | the National “10th 5-year Plans” Project of China (Grant No. 2004BA313B20) |
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| 摘 要： | MesoDyn density functional simulation method is used to study the interactions between dodecyl oxypropyl β-hydroxyltrimethylammonium bromide (C12NBr) and Xanthan (XC). The micro dynamic process of aggregate formation and the aggregate morphology are reported. Interaction between XC and nonyphenyloxypropyl β-hydroxyltrimethylammonium bromide (C9phNBr) is compared with that between XC and C12NBr. Simulation results show that the aggregate morphology of XC/C12NBr and XC/C9phNBr is of rod-like shape with helix characteristic. The binding of C9phNBr to XC is more difficult than that of C12NBr to XC. In addition, three stages for the dynamic evolution of surfactant binding to XC are observed. The simulation results agree with binding isotherms of C9phNBr (C12NBr) to XC obtained via the potentiometric titration method, which shows a typical cooperative binding between C9phNBr (C12NBr) and XC.
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| 关 键 词： | 十二烷基 溴化物 黄原胶 等温线 相互作用 表面活性剂 |
| 收稿时间： | 10 May 2007 |
| 修稿时间： | 2007-05-10 |
Interaction between dodecyl oxypropyl <Emphasis Type="Italic">β</Emphasis>-hydroxyltrimethylammonium bromide and Xanthan: MesoDyn simulation and binding isotherm measurements |
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| LI YiMing XU GuiYing CHEN AiMin DONG ShuLi YUAN ShiLing.Interaction between dodecyl oxypropyl β-hydroxyltrimethylammonium bromide and Xanthan: MesoDyn simulation and binding isotherm measurements[J].Chinese Science Bulletin,2007,52(19):2605-2611. |
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| Authors: | Li Yiming Xu GuiYing Chen AiMin Dong ShuLi Yuan ShiLing |
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| Institution: | (1) Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, Shandong University, Jinan, 250100, China |
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| Abstract: | MesoDyn density functional simulation method is used to study the interactions between dodecyl oxypropyl β-hydroxyltrimethylammonium bromide (C12NBr) and Xanthan (XC). The micro dynamic process of aggregate formation and the aggregate morphology are reported. Interaction
between XC and nonyphenyloxypropyl β-hydroxyltrimethylammonium bromide (C9phNBr) is compared with that between XC and C12NBr. Simulation results show that the aggregate morphology of XC/C12NBr and XC/C9phNBr is of rod-like shape with helix characteristic. The binding of C9phNBr to XC is more difficult than that of C12NBr to XC. In addition, three stages for the dynamic evolution of surfactant binding to XC are observed. The simulation results
agree with binding isotherms of C9phNBr (C12NBr) to XC obtained via the potentiometric titration method, which shows a typical cooperative binding between C9phNBr (C12NBr) and XC.
Supported by the National “10th 5-year Plans” Project of China (Grant No. 2004BA313B20) |
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| Keywords: | surfactant xanthan binding MesoDyn simulation binding isotherms |
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