Controllable regulation of microdroplets size in W/O microemulsion with Cu(Ac)2-Zn(Ac)2 solution as aqueous phase
Microemulsions are commonly used for the preparation of nanomaterials.The controllable regulation of the size of microdroplets is crucial to the preparation of nanomaterials.When Cu(Ac)2-Zn(Ac)2 electrolyte aqueous solution was used as the aqueous phase,the variations of microdroplets sizes of W/O microemulsion system of Triton X-100 were studied systematically.The experimental results showed that the droplet size could be regulated in the range of 4-12nm by changing the water content in the microemulsion and the type of electrolyte solution.And within a certain range,the average size of microdroplets increased with the increase of water content in the system.The different forces between metal ions and water molecules in the electrolyte solution also led to different changes in the particle size distribution of the droplets.The addition of electrolyte did not change the appearance and stability of the microemulsion.In the microemulsion systems with chain alkanes as oil phase,the size distribution of microdroplets with Cu(Ac)2-Zn(Ac)2 electrolyte aqueous solution as water phase was more uniform.CuO-ZnO nanoparticles were successfully prepared by the proposed microemulsion method.The results were useful to provide a guide for the controllable regulation of microdroplet size and the preparation of nanomaterials.
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