粒子与聚合物协同稳定高内相Pickering乳液

Synergistic Stabilization of High Internal Phase Pickering Emulsions by a Mixture of Nanoparticle and Polymer

选用二氧化硅纳米粒子(H30)和聚(乳酸-羟基乙酸)共聚物(PLGA)为复合稳定剂,成功制备出内相体积分数高达90%的高内相Pickering乳液.对照实验表明:单独用H30粒子作稳定剂,内相体积分数上限为75%;单独用PLGA作稳定剂,发生严重相分离,不能形成乳液.无机纳米粒子与聚合物之间的协同作用在制备高内相乳液的过程中起到了关键作用.因此,使用无机粒子和聚合物作为混合稳定剂制备高内相乳液是一种新型而有效的方法.

In this paper,we have prepared high internal phase Pickering emulsions（Pickering HIPEs） with internal phase volume fraction 90% which are stabilized by a mixture of silica nanoparticles（H30） and poly（L-lactide-co-glycolide）（PLGA）.HIPEs with an internal phase volume not more than 75% could be prepared solely by H30 nanoparticles.Using PLGA as stabilizer,phase separation takes place and stable emulsions are not formed.Synergistic interaction between H30 particles and PLGA molecules plays an im-portant part in preparation of HIPEs.Using inorganic particles and polymer as co-stabilizer will be a new and effective method to prepare HIPEs.