He Qiang, Song Weixing, Möhwald Helmuth, Li Junbai
Beijing National Laboratory for molecular Sciences, Chinese Academy of Sciences, Beijing 100080, China.
Langmuir. 2008 May 20;24(10):5508-13. doi: 10.1021/la703738m. Epub 2008 Apr 10.
The assembled polyelectrolyte nanotubes composed of poly(styrenesulfonate) and poly(allylamine hydrochloride) multilayers by using the layer-by-layer assembly combined with the porous template method can be transformed into capsules by a high-temperature treatment. Scanning electron microscopy and confocal laser scanning microscopy images revealed the whole transition process. The structure transformation of polyelectrolyte multilayers after annealing can be initiated by the input of thermal energy which leads to a breakage of ion pairs between oppositely charged polyelectrolyte groups. The transition process from tubes to capsules is supposed to be driven by the Raleigh instability and leads to the generated polyelectrolyte capsules with different sizes.
通过层层组装结合多孔模板法制备的由聚（苯乙烯磺酸盐）和聚（烯丙胺盐酸盐）多层组成的聚电解质纳米管，经高温处理可转化为胶囊。扫描电子显微镜和共聚焦激光扫描显微镜图像揭示了整个转变过程。退火后聚电解质多层的结构转变可由热能输入引发，这导致带相反电荷的聚电解质基团之间的离子对断裂。从管到胶囊的转变过程被认为是由瑞利不稳定性驱动的，并导致生成不同尺寸的聚电解质胶囊。
