Synthesis of Hydrogen-Bonded Pore-Switchable Cylindrical Vesicles via Visible-Light-Mediated RAFT Room-Temperature Aqueous Dispersion Polymerization
Synthesis of Hydrogen-Bonded Pore-Switchable Cylindrical Vesicles via Visible-Light-Mediated RAFT Room-Temperature Aqueous Dispersion Polymerization
复制标题
通过可见光介导的 RAFT 室温水分散聚合合成氢键孔可切换的圆柱形囊泡
DOI：
10.1021/acsmacrolett.6b00796
复制
发表时间：
2016-12-01
影响因子：
7.015
通讯作者：
Cai, Yuanli
中科院分区：
文献类型：
--
作者：
Gao, Pan;Cao, Hui;Cai, Yuanli
与纤维素类似，其单体单元同时具有氢供体和受体的聚合物由于氢键（HB）通常不溶于环境水。在此，我们提出了在 25 摄氏度下，在可见光介导的 RAFT 水分散聚合下，使用 HB 驱动的聚合诱导自组装 (PISA) 直接合成的刺激响应性长水性圆柱形囊泡（纳米管）。PISA 经历了前所未有的薄膜/丝到带到囊泡的转变，并在核心形成的低 DP（类似于 25-85）下形成薄膜/丝/带阻止自由流动的水溶液。通过将少量电离单体单元插入到核心形成块中，对各向异性囊泡膜中的 HB 缔合进行静电排斥扰动，从而合成了孔可切换纳米管。这些纳米管的合成固体含量>35%，管状膜比球形膜对水环境的响应更敏感。这种简便、稳健和通用的策略为先进智能纳米材料的规模化生产铺平了一条新途径。
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.