Multicompartment micelles from ABC miktoarm stars in water
Multicompartment micelles from ABC miktoarm stars in water
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DOI：
10.1126/science.1103350
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发表时间：
2004-10-01
期刊：
影响因子：
56.9
通讯作者：
Lodge, TP
中科院分区：
文献类型：
--
作者：
Li, ZB;Kesselman, E;Lodge, TP
通过将三个互不相容的聚合物组分组合在一个混合臂星形嵌段三元共聚物结构中，我们观察到在稀水溶液中形成了一类以前未知的多隔室胶束。水溶性聚环氧乙烷与两个疏水但不相容的组分(聚合烃和全氟聚醚)在同一交界处连接，在分散在水溶液中时会导致分子受挫。不相容的疏水嵌段形成的核心由聚氧乙烷嵌段保护，但由于链结构的原因，两者都被迫与聚环氧乙烷接触。出现的结构取决于嵌段的相对长度，并且可以从离散的多隔室胶束到具有分段核心的扩展蠕虫状结构进行调整。
By combining three mutually immiscible polymeric components in a mixed-arm star block terpolymer architecture, we have observed the formation of a previously unknown class of multicompartment micelles in dilute aqueous solution. Connection of water-soluble poly(ethylene oxide) and two hydrophobic but immiscible components (a polymeric hydrocarbon and a perfluorinated polyether) at a common junction leads to molecular frustration when dispersed in aqueous solution. The incompatible hydrophobic blocks form cores that are protected from the water by the poly(ethylene oxide) blocks, but both are forced to make contact with the poly(ethylene oxide) by virtue of the chain architecture. The structures that emerge depend on the relative lengths of the blocks and can be tuned from discrete multicompartment micelles to extended wormlike structures with segmented cores.