Use of water-in-oil microemulsion technique for continuous flow synthesis of iron oxide nanoparticles
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| Year of publication | 2019 |
| Type | Conference abstract |
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| Description | The production of nanoparticles in larger scale requires a continuous production process. This contradicts with outputs of basic research that uses predominantly batch synthesis. A continuous production of nanoparticles may fail when the size, shape and distribution of nanoparticles depend on nucleation way and/or intensity of mixing and diffusion. This can be improved by turbulent flow, ultrasound apply, or other techniques. However, such continuous synthesis improvements may not be sufficient. The use of microemulsion techniques is therefore promising. The synthesis of iron oxide nanoparticles was chosen as a model case for the assessment of the microemulsion synthesis in continuous flow. A water-sodium dodecyl sulphate (SDS)-cyclohexene system has been chosen as the microemulsion system for dissolving mixtures of iron II and III, ammonia, and stabilizing ligands. Microemulsion solutions of starting materials were prepared and subsequently mixed in a ultrasound flow reactor under various conditions (concentration, flow rate, temperature). The product was purified and transferred to the aqueous phase. The result was colloid solution of iron oxide nanoparticles in water of 5-200 nm in size with a zeta potential ranging -25 to -57mV. The final product was characterized by UV VIS, powder XRD, dynamic light scattering, electron microscopy, electron diffraction. The results showed that use of water-in-oil microemulsions is a perspective method of nanoparticle synthesis to obtain product in larger quantities. |
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