ABC triblock copolymer hamburger-like micelles, segmented cylinders, and Janus particles
ABC triblock copolymer hamburger-like micelles, segmented cylinders, and Janus particles
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DOI：
10.1039/c0sm00044b
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发表时间：
2010-01-01
期刊：
影响因子：
3.4
通讯作者：
Liu, Guojun
中科院分区：
文献类型：
--
作者：
Dupont, John;Liu, Guojun
合成了一种末端含羧基C嵌段、中间可光交联B嵌段的ABC型线性三嵌段共聚物。在B嵌段较差的溶剂和二胺(-)-sparteine存在的情况下，三嵌段共聚物与C嵌段络合，使其不溶，自组装成汉堡包状胶束聚集体和分段圆柱体。在“汉堡包”中，“面包”是由B块构成的，馅料是由络合的C块构成的，可溶性的a链从面包表面伸展到溶剂相。分段圆柱的主体由B和C桩交替堆叠而成。这些圆柱体通过从B存根表面伸出的A链分散在溶剂中。通过光交联和透析去除(-)-sparteine后，我们能够分离汉堡的圆面包，产生大概是Janus粒子。
An ABC linear triblock copolymer with a carboxyl-containing terminal C block and a photocrosslinkable middle B block was synthesized and characterized. In a poor solvent for the B block and in the presence of a diamine, (-)-sparteine, which complexed with the C block and made it insoluble, the triblock copolymer self-assembled into hamburger-like micellar aggregates and segmented cylinders. In a "hamburger", the "buns" were made of the B block, the filling was made of the complexed C block, and the soluble A chains stretched out from the bun surface into the solvent phase. The main body of the segmented cylinders was made of stacking alternating B and C stubs. The cylinders were dispersed in solvent by the A chains stretching out from the surfaces of the B stubs. After the photocrosslinking of the buns of the hamburgers and the removal of (-)-sparteine by dialysis, we were able to separate the buns of the hamburgers to yield presumably Janus particles.