Preparation of Hollow Calcium Silicate Microparticles by Simple Emulsion

• 作者: Eiichi Toorisaka Makoto Hirata Syotaro Nagamatsu Tadashi Hano Yasunobu Saruwatari
• 来源期刊: 封装与吸附期刊(英文)
• 学科: 化学
• 关键词: HOLLOW INORGANIC MICROPARTICLE Water-in-Oil EMULSION Solvent Extraction INTERFACIAL Reaction
• 年，卷（期）: 2014,（4）
• 页码范围: 114-121
• 页数: 8页
• 分类号: O6

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.