Research ArticleOpen AccessGoogle Scholar indexed
Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion
Department of Environmental Science and Engineering, Yamaguchi University, Yamaguchi, Japan
Department of Applied Chemistry, Oita University, Oita, Japan
Department of Applied Chemistry, Oita University, Oita, Japan
Department of Applied Chemistry, Oita University, Oita, Japan
Department of Applied Chemistry, Oita University, Oita, Japan
- 1 Department of Environmental Science and Engineering, Yamaguchi University, Yamaguchi, Japan
- 2 Department of Applied Chemistry, Oita University, Oita, Japan
- 3 Department of Applied Chemistry, Oita University, Oita, Japan
- 4 Department of Applied Chemistry, Oita University, Oita, Japan
- 5 Department of Applied Chemistry, Oita University, Oita, Japan
Journal of Encapsulation and Adsorption Sciences·Volume 04 (2014)·Pages 114–121·Published 7 November 2014·DOI10.4236/jeas.2014.44012
Copy link · social · email
Abstract
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.
KeywordsHollow Inorganic MicroparticleWater-in-Oil EmulsionSolvent ExtractionInterfacial Reaction
- Caruso, F. (2000) Hollow Capsule Processing through Colloidal Templating and Self-Assembly. Chemistry—A European Journal, 6, 413-419. http://dx.doi.org/10.1002/(SICI)1521-3765(20000204)6:3 3.0.CO;2-9
- Sarti, S. and Bordi, F. (2013) Polymeric Hollow Micro and Nanospheres for Biotechnological Applications: A focused Review. Materials Letters, 10, 134-139. http://dx.doi.org/10.1016/j.matlet.2013.07.003
- Brun-Graeppi, A.K.A.S., Richard, C., Bessodes, M., Scherman, D. and Merten, O.W. (2011) Cell Microcarriers and Microcapsules of Stimuli-Responsive Polymers. Journal of Controlled Release, 149, 209-224. http://dx.doi.org/10.1016/j.jconrel.2010.09.023
- Lensen, D., Vriezema, D.M. and van Hest, C.M. (2008) Polymeric Microcapsules for Synthetic Applications. Macromolecular Bioscience, 8, 991-1005. http://dx.doi.org/10.1002/mabi.200800112
- Hu, J., Chen, M., Fang, X. and Wu, L. (2011) Fabrication and Application of Inorganic Hollow Spheres. Chemical Society Reviews, 40, 5471-5491. http://dx.doi.org/10.1039/c1cs15103g
- Bertling, J., Blömer, J. and Kümmel, R. (2004) Hollow Microsphere. Chemical Engineering & Technology, 27, 829-837. http://dx.doi.org/10.1002/ceat.200406138
- Morishige, I., Hirata, M., Toorisaka, E., Ohtakem, T. and Hano, T. (2005) Preparation of Various Metal-Silicate Microballoons Using W/O/W Emulsion. Journal of Microencapsulation, 22, 291-301. http://dx.doi.org/10.1080/02652040500100527
- Toorisaka, E., Morishige, I., Hirata, M. and Hano, T. (2010) Effect of Preparation Conditions on Calcium-Silicate Microcapsule Formation Using a Liquid Surfactant Membrane. ITE-IBA Letters on Batteries, New Technology & Medicine, 3, 36-40.
- Toorisaka, E., Morishige, I., Hirata M. and Hano, T. (2010) Preparation of Multiple Metal-Silicate Microcapsules with Emulsified Liquid Membrane. ITE-IBA Letters on Batteries, New Technology & Medicine, 3, 46-52.
- Fujiwara, M., Shiokawa, K., Tanaka, Y. and Nakahara, Y. (2004) Preparation and Formation Mechanism of Silica Microcapsules (Hollow Sphere) by Water/Oil/Water Interfacial Reaction. Chemistry of Materials, 16, 5420-5426. http://dx.doi.org/10.1021/cm048804r
- Fujiwara, M., Shiokawa, K., Sakakura, I. and Nakahara, Y. (2010) Preparation of Hierarchical Architectures of Silica Particles with Hollow Structure and Nanoparticles Shells: A Material for the High Reflectivity of UV and Visible Light. Langmuir, 26, 6561-6567. http://dx.doi.org/10.1021/la9043396