DPD Simulation on the Transformation and Stability of O/W and W/O Microemulsions |
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| Authors: | Menghua Li Haixia Zhang Zongxu Wu Zhenxing Zhu Xinlei Jia |
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| Affiliation: | 1.Department of Chemical Engineering and Safety, Binzhou University, Binzhou 256603, China;2.Binzhou Dayou New Energy Development Company Limited, Binzhou 256600, China;3.Binzhou City Building and Design Institute, Binzhou 256600, China; |
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| Abstract: | The dissipative particle dynamics simulation method is adopted to investigate the microemulsion systems prepared with surfactant (H1T1), oil (O) and water (W), which are expressed by coarse-grained models. Two topologies of O/W and W/O microemulsions are simulated with various oil and water ratios. Inverse W/O microemulsion transform to O/W microemulsion by decreasing the ratio of oil-water from 3:1 to 1:3. The stability of O/W and W/O microemulsion is controlled by shear rate, inorganic salt and the temperature, and the corresponding results are analyzed by the translucent three-dimensional structure, the mean interfacial tension and end-to-end distance of H1T1. The results show that W/O microemulsion is more stable than O/W microemulsion to resist higher inorganic salt concentration, shear rate and temperature. This investigation provides a powerful tool to predict the structure and the stability of various microemulsion systems, which is of great importance to developing new multifunctional microemulsions for multiple applications. |
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| Keywords: | microemulsion interfacial tension end to end distance dissipative particle dynamics (DPD) simulation |
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