Primary Formation Kinetics of Water-rich Non-ionic Microemulsions
Non-equilibrium properties of microemulsions, like the primary microstructure formation mechanism has hardly been investigated. In our previous experiments (9-10-1272), an oil-rich non-ionic microemulsion system of the type D2O - cyclohexane - C10E5 has been studied using the ultra-fast stopped-flow device BioLogic SFM300 at the D33 with a custom made highly temperature stable head piece designed and supplied by us. Here, an unstructured binary solution of cyclohexane/C10E5 and D2O were mixed at different contrasts leading to an oil-rich w/o-microemulsion. The primary formation process of the internal interface was found to be faster than 20 ms and the interfacial composition remains constant over the experimental time course. Throughout the following 180 s the final water-uptake can be resolved and is accompanied by a structural reorganisation. Introducing amphiphilic polymers to the system the reorganisation kinetics are significantly slowed down while speeding up the water-uptake. Nevertheless, no complementary study has been done on the water-rich side. Here a different mixing approach will be chosen in order to achieve a better resolution of the process.
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HARBAUER Carola; GRILLO Isabelle; KLEMMER Helge; PUETZ Yvonne; STREY Reinhard and YANG Ji Yoon. (2014). Primary Formation Kinetics of Water-rich Non-ionic Microemulsions. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1387
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