Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion

作     者：Eiichi Toorisaka Syotaro Nagamatsu Yasunobu Saruwatari Makoto Hirata Tadashi Hano 

作者机构：Department of Environmental Science and Engineering Yamaguchi University Yamaguchi Japan Department of Applied Chemistry Oita University Oita Japan 

出 版 物：《Journal of Encapsulation and Adsorption Sciences》 (封装与吸附期刊（英文）)

年 卷 期：2014年第4卷第4期

页      面：114-121页

学科分类：07[理学] 0703[理学-化学] 

主　　题：Hollow Inorganic Microparticle Water-in-Oil Emulsion Solvent Extraction Interfacial Reaction 

摘      要：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.