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Comparison of aggregation behaviors between branched and linear block polyethers: MesoDyn simulation study |
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| Authors: | Houjian Gong Guiying Xu Xiaofeng Shi Teng Liu Zhiwei Sun |
| Institution: | 1. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, People’s Republic of China 2. Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China 3. National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China |
| Abstract: | The comparison of aggregation behaviors between the branched block polyether T1107 (polyether A) and linear polyether (EO)60(PO)40(EO)60 (polyether B) in aqueous solution are investigated by the MesoDyn simulation. Polyether A forms micelles at lower concentration and has a smaller aggregation number than B. Both the polyethers show the time-dependent micellar growth behaviors. The spherical micelles appear and then change to rod-like micelles with time evolution in the 10 vol% solution of polyether A. The micellar cluster appears and changes to pseudo-spherical micelles with time evolution in the 20 vol% solution of polyether A. However, the spherical micelles appear and change to micellar cluster with time evolution in the 20 vol% polyether B solution. The shear can induce the micellar transition of both block polyethers. When the shear rate is 1?×?105 s?1, the shear can induce the sphere-to-rod transition of both polyethers at the concentration of 10 and 20 vol%. When the shear rate is lower than 1?×?105 s?1, the huge micelles and micellar clusters can be formed in the 10 and 20 vol% polyether A systems under the shear, while the huge micelles are formed and then disaggregated with the time evolution in the 20 vol% polyether B system. |
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