Cubosomes from hierarchical self-assembly of poly(ionic liquid) block copolymers.
Cubosomes from hierarchical self-assembly of poly(ionic liquid) block copolymers.
复制标题
DOI：
10.1038/ncomms14057
复制
发表时间：
2017-01-16
影响因子：
16.6
通讯作者：
Matyjaszewski K
中科院分区：
文献类型：
--
作者：
He H;Rahimi K;Zhong M;Mourran A;Luebke DR;Nulwala HB;Möller M;Matyjaszewski K
立方体是具有双连续立方两相结构的微米和纳米颗粒，被报道用于低分子表面活性剂的自组装，例如脂类，但很少由聚合物形成。这些物体具有最大的连续界面和高的界面体积比，这使得它们在高效吸附剂和主客体应用方面具有广阔的应用前景。在这里，我们展示了在优化的条件下，两亲聚(离子液体)两嵌段共聚物聚(丙烯酸)-聚(4-乙烯基苄基)-3-丁基咪唑双(三氟甲基磺酰亚胺)在四氢呋喃和水的混合物中自组装成具有双连续立方结构的纳米立方体粒子。结构决定参数包括聚合物组成和浓度、温度和溶剂混合物的变化。立方体的形成可以用组成成分的层级相互作用来解释。嵌段共聚物的晶格结构可以转变为颗粒的形状，这在原子和分子小平面晶体中是常见的。通常，立方体是由脂类等表面活性物质自组装而成，可用作吸附剂或用于主客体应用。在这里，作者已经证明了两亲性嵌段共聚物可以形成具有双连续立方相的纳米立方体粒子。
Cubosomes are micro- and nanoparticles with a bicontinuous cubic two-phase structure, reported for the self-assembly of low molecular weight surfactants, for example, lipids, but rarely formed by polymers. These objects are characterized by a maximum continuous interface and high interface to volume ratio, which makes them promising candidates for efficient adsorbents and host-guest applications. Here we demonstrate self-assembly to nanoscale cuboidal particles with a bicontinuous cubic structure by amphiphilic poly(ionic liquid) diblock copolymers, poly(acrylic acid)-block-poly(4-vinylbenzyl)-3-butyl imidazolium bis(trifluoromethylsulfonyl)imide, in a mixture of tetrahydrofuran and water under optimized conditions. Structure determining parameters include polymer composition and concentration, temperature, and the variation of the solvent mixture. The formation of the cubosomes can be explained by the hierarchical interactions of the constituent components. The lattice structure of the block copolymers can be transferred to the shape of the particle as it is common for atomic and molecular faceted crystals. Generally cubosomes are formed by the self-assembly of surfactants such as lipids and are used as adsorbents or in host-guest applications. Here the authors have shown that an amphiphilic block copolymer can form nanoscale cuboidal particles with a bicontinuous cubic phase.