为拓展SiO2气凝胶的应用范围,克服SiO2气凝胶微球制备技术中的不足,采用搅拌成球工艺以水玻璃为硅源在单一油相中制备了直径为2～1500μm的SiO2气凝胶微球,并研究了制备工艺条件对其粒径大小及均匀性的影响.研究结果表明,各个工艺条件之间互相关联和影响,成胶时间起着关键作用.当成胶时间适中或较长时,工艺条件中只有搅拌速度对粒径大小影响显著,同时所有工艺条件都对粒径的均匀性无明显影响;而成胶时间较短时,任一工艺条件的改变都会使粒径大小及均匀性发生变化.
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