Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion


Hollow calcium silicate microparticles were prepared by mixing a water-in-oil (W/O) emulsion containing silicate ions in aqueous phase with an oil phase containing a calcium/di-2-ethylhexyl phosphoric acid (D2EHPA) complex. The inorganic precipitation reaction at the oil-water interface was accelerated by using a simple W/O emulsion. Hollow microparticles were obtained when the mole ratio of D2EHPA and calcium in the oil phase was nearly 2:1. The shell formation of the par-ticles depended on the acceleration of the precipitation reaction, which could be accomplished by controlling the concentrations of the calcium and silicate ions.

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Toorisaka, E. , Nagamatsu, S. , Saruwatari, Y. , Hirata, M. and Hano, T. (2014) Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion. Journal of Encapsulation and Adsorption Sciences, 4, 114-121. doi: 10.4236/jeas.2014.44012.

Conflicts of Interest

The authors declare no conflicts of interest.


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