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首页> 外文期刊>ACS Macro Letters >Synthesis of Hydrogen-Bonded Pore-Switchable Cylindrical Vesicles via Visible-Light-Mediated RAFT Room-Temperature Aqueous Dispersion Polymerization
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Synthesis of Hydrogen-Bonded Pore-Switchable Cylindrical Vesicles via Visible-Light-Mediated RAFT Room-Temperature Aqueous Dispersion Polymerization

机译:可见光介导的RAFT室温水分散聚合法合成氢键结合的孔可转换圆柱泡

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摘要

Analogous to cellulose, polymers whose monomer units possess both hydrogen donators and acceptors are generally insoluble in ambient water because of hydrogen bonding (HB). Herein we present stimuli-responsive long aqueous cylindrical vesicles (nanotubes) synthesized directly using HB-driven polymerization-induced self-assembly (PISA) under visible-light-mediated RAFT aqueous dispersion polymerization at 25 degrees C. The PISA undergoes an unprecedented film/silk-to-ribbon-to-vesicle transition and films/silks/ribbons formed at low DPs (similar to 25-85) of core-forming block in free flowing aqueous solution. Pore-switchable nanotubes are synthesized by electrostatic repulsive perturbation of the HB association in anisotropic vesicular membranes via inserting minor ionized monomer units into the core-forming block. These nanotubes are synthesized at >35% solids, and tubular membranes are more sensitive than spherical counterparts in response to aqueous surroundings. This facile, robust, and general strategy paves a new avenue toward scale-up production of advanced intelligent nanomaterials.
机译:类似于纤维素,由于氢键(HB),其单体单元同时具有氢供体和受体的聚合物通常不溶于环境水中。本文中,我们介绍了在25摄氏度下在可见光介导的RAFT水分散体聚合下,使用HB驱动的聚合诱导的自组装(PISA)直接合成的刺激响应性长圆柱状囊泡(纳米管)。PISA经历了前所未有的膜/在自由流动的水溶液中,在核心形成嵌段的低DPs(类似于25-85)下,从丝到色带到囊泡的转变以及形成的薄膜/丝/丝带。通过将各向异性的水泡膜中的HB缔合静电排斥,将少量离子化的单体单元插入成核嵌段中,可以合成孔隙可转换的纳米管。这些纳米管以> 35%的固体含量合成,并且管状膜对球形水溶液的反应对水性环境敏感。这种简便,可靠且通用的策略为先进的智能纳米材料的大规模生产铺平了道路。

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