I have prepared the stable water-in-oil Pickering emulsion by using stearic acid-modified CaCO3 nanoparticles. The oil phase is toluene and the dispersed phase is deionized water. I want to use this approach to make the microcapsule containing molten salt. Will an addition of salt (NaCl, NaNO3,....) destabilize the water-in-oil Pickering emulsion system above? I just need a small amount of molten salt to be encapsulated.
Thank you so much.
Pham The Sang
The formation of the sodium salt of stearic acid will destabilize the emulsion.
Yuri Mirgorod
Thank you so much for your answer. I conducted the experiment and I found that the more salt concentration, the more fracture of colloidal capsule which indeed indicates the destabilize of the emulsion. However, I found that the solution containing salt concentration of 0.1 wt.% seemed to show negligible fractures that may be acceptable. But if I want to add more salt into the core, do you have any suggestion for me? Thank you and looking forward to your response.
Pham The Sang
It is possible that a large amount of stearic acid and salt will contribute to the usual stabilization of the emulsion by means of a surfactant (stearic soap).
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