From the 2-dimensional unstable polyelectrolyte multilayer to the 3-dimensional stable dry polyelectrolyte capsules.
From the 2-dimensional unstable polyelectrolyte multilayer to the 3-dimensional stable dry polyelectrolyte capsules.
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DOI：
10.1016/j.jcis.2011.07.034
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发表时间：
2011-11
影响因子：
9.9
通讯作者：
Xiaodong Li;Jianxiang Zhang;Qiaoling Hu;Xiaohui Li
中科院分区：
文献类型：
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作者：
Xiaodong Li;Jianxiang Zhang;Qiaoling Hu;Xiaohui Li
研究发现聚苯乙烯-聚丙烯酸/聚烯丙胺盐酸盐多层膜在纯水中不稳定且易于重构。通过在聚苯乙烯-聚丙烯酸杂化CaCO3模板上沉积聚苯乙烯-聚丙烯酸/聚(盐酸烯丙胺)多层，在去除模板后可以制备新型聚电解质胶囊。所得胶囊在室温干燥后可以保持其三维（3D）球形形状，这与基于逐层程序的非混合模板的传统聚电解质胶囊显着不同。不稳定的聚电解质多层、混合模板和组装周期被证明是形成此类 3D 稳定胶囊的三个不可或缺的因素。本研究还讨论了其形成机制。
Polystyrene–poly(acrylic acid)/poly(allylamine hydrochloride) polyelectrolyte multilayer was found to be instable and apt to reconstruct in the pure water. By depositing polystyrene–poly(acrylic acid)/poly(allylamine hydrochloride) multilayer on the polystyrene–poly(acrylic acid) hybrid CaCO3templates, novel polyelectrolyte capsules could be prepared after the removal of the templates. The resultant capsules could keep their three-dimensional (3D) spherical shape after being dried at room temperature, dramatically different from the conventional polyelectrolyte capsules based on nonhybrid templates by layer-by-layer procedure. The instable polyelectrolyte multilayer, hybrid templates, and assembly cycles were demonstrated to be three indispensable factors responsible for the formation of this type of 3D stable capsules. The formation mechanism was also discussed in this study.