Department of Chemical and Biological Engineering, Applied Surface Chemistry, Chalmers University of Technology, Göteborg, Sweden.
Langmuir. 2012 Mar 6;28(9):4047-50. doi: 10.1021/la300112t. Epub 2012 Feb 22.
Highly stable poly(methyl methacrylate) (PMMA) based microcapsule suspensions without excess dispersant are obtained via the solvent evaporation route using poly(methyl methacrylate)-block-poly(sodium methacrylate) or poly(methyl methacrylate)-block-poly(sodium acrylate) diblock copolymers as dispersant. The stable suspension is characterized by a high ζ-potential that does not change with time or after washing steps. It is indirectly proven on model PMMA surfaces using quartz crystal microbalance with dissipation monitoring that the PMMA block of the copolymer is embedded in the underlying PMMA microcapsule. Such anchoring of the dispersant is key for the good colloidal stability.
通过溶剂蒸发法，使用聚甲基丙烯酸甲酯-嵌段-聚（甲基丙烯酸钠）或聚甲基丙烯酸甲酯-嵌段-聚（丙烯酸钠）两嵌段共聚物作为分散剂，获得了具有高稳定性且无过量分散剂的聚甲基丙烯酸甲酯（PMMA）基微胶囊悬浮液。稳定的悬浮液具有高 ζ 电位，该电位不会随时间或洗涤步骤而变化。通过石英晶体微天平耗散监测间接证明，共聚物的 PMMA 嵌段嵌入到基础 PMMA 微胶囊中。这种分散剂的锚固是胶体稳定性良好的关键。
