Disk-Like Micelles with a Highly Ordered Pattern from Molecular Bottlebrushes.
Disk-Like Micelles with a Highly Ordered Pattern from Molecular Bottlebrushes.
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DOI：
10.1021/mz400619g
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发表时间：
2014-01
影响因子：
5.8
通讯作者：
Yi Shi;Wen-xiang Zhu;D. Yao;Meiling Long;Bo Peng;Ke Zhang;Yongming Chen
中科院分区：
文献类型：
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作者：
Yi Shi;Wen-xiang Zhu;D. Yao;Meiling Long;Bo Peng;Ke Zhang;Yongming Chen
将无定形大分子自组装成具有高度有序内部结构和特定形状的纳米粒子一直是一个巨大的挑战。本文报道了由六方堆积的AbBA两亲性三嵌段共聚物形成的软盘状胶束，其bB嵌段是具有密集接枝的聚（丙烯酸叔丁酯）-b-聚苯乙烯（PBA-b-PS）支链的分子瓶刷，A嵌段是聚（N-（2-甲基丙烯酰氧乙基）吡咯烷酮）（PNMEP）。在A链段的选择性溶剂中，发现具有刚性中间块的AbBA分子瓶刷二维自组装成厚度约33 nm、直径数百nm的均匀圆盘.通过选择性染色刷的PS壳，用TEM观察到垂直于盘平面排列的分子瓶刷的六边形图案，其周期性间距为9 nm。从染色的TEM图像直接计数每个盘中AbBA分子瓶刷的聚集数。
Self-assembling amorphous macromolecules into nanoparticles with a highly ordered internal structure and a defined shape is always a big challenge. Herein we present formation of soft disk-like micelles by hexagonally packing AbBA amphiphilic triblock copolymers, whose bB block is the molecular bottlebrush with densely grafted poly(t-butyl acrylate)-b-polystyrene (PBA-b-PS) branches and A block is poly(N-(2-methacryloyloxyethyl)pyrrolidone) (PNMEP). In a selective solvent of A segment, it was found that the AbBA molecular bottlebrushes with stiffened middle blocks self-assembled two-dimensionally into disks with a uniform thickness of about 33 nm and a diameter of hundreds of nanometers. A hexagonal pattern of molecular bottlebrushes aligned perpendicularly to the disk plane with a periodic spacing of 9 nm was visualized by TEM through selective staining the PS shells of brushes. The aggregation number of AbBA molecular bottlebrushes in each disk was counted directly from the stained TEM image.