Halozan David, Déjugnat Christophe, Brumen Milan, Sukhorukov Gleb B
Department of Physics, University of Maribor, Koroska c. 160, 2000 Maribor, Slovenia.
J Chem Inf Model. 2005 Nov-Dec;45(6):1589-92. doi: 10.1021/ci050192n.
An approach for the entrapment of a polyanion by polyelectrolyte microcapsules is reported. It is based on a reversal changing of microcapsule wall permeability from neutral to basic pH. Polyelectrolyte microcapsules were templated on latex (polystyrene) particles by the layer-by-layer adsorption of oppositely charged polymers of sodium poly(styrene sulfonate) and poly(allylamine hydrochloride), followed by core removal using tetrahydrofuran. In alkaline conditions, the microcapsules swell and become permeable for polymers. During encapsulation, the addition of salt ions increases the amount of the polymer encapsulated and contributes to its protonation because of redistribution of H+ ions across a semipermeable microcapsule wall. The redistribution of small ions across the microcapsule wall was tuned by adding salt according to the Donnan equilibrium and was characterized by H+ sensitive dyes.
报道了一种通过聚电解质微胶囊包封聚阴离子的方法。它基于微胶囊壁通透性从中性pH到碱性pH的反向变化。通过聚（苯乙烯磺酸钠）和聚（烯丙胺盐酸盐）等带相反电荷的聚合物的逐层吸附，以乳胶（聚苯乙烯）颗粒为模板制备聚电解质微胶囊，随后用四氢呋喃去除核心。在碱性条件下，微胶囊膨胀并对聚合物变得可渗透。在包封过程中，盐离子的添加增加了包封的聚合物量，并由于H⁺离子跨半透性微胶囊壁的重新分布而有助于其质子化。根据唐南平衡通过添加盐来调节小离子跨微胶囊壁的重新分布，并用对H⁺敏感的染料进行表征。
