Light-Triggered Reversible Slimming of Azobenzene-Containing Wormlike Nanoparticles Synthesized by Polymerization-Induced Self-Assembly for Nanofiltration Switches
Light-Triggered Reversible Slimming of Azobenzene-Containing Wormlike Nanoparticles Synthesized by Polymerization-Induced Self-Assembly for Nanofiltration Switches
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DOI：
10.1021/acsmacrolett.9b00146
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发表时间：
2019-04-01
影响因子：
7.015
通讯作者：
Chen, Aihua
中科院分区：
文献类型：
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作者：
Guan, Song;Deng, Zichao;Chen, Aihua
光响应性蠕虫状嵌段共聚物纳米粒子（NPs）在多种领域具有潜在的应用，但其制备方法存在蠕虫相区域狭窄和繁琐的方法。在这项工作中，基于聚（甲基丙烯酸）-b-聚（4-（（4-丁基苯基）二氮烯基）苯基甲基丙烯酸酯）的含偶氮苯的蠕虫状纳米颗粒是通过在乙醇中高固体浓度下聚合诱导的自组装来制备的。由于核心形成块的刚性性质，纯蠕虫状纳米颗粒在形态相图中占据了非常广泛的区域。这些蠕虫状纳米粒子在紫外线照射下通过反式-顺式转化而膨胀，并在可见光照射下细长到接近原始状态。蜗杆的直径及其变化幅度随着成芯块链长的增加而增大。此外，组装了罗丹明 B 的纳滤开关，以说明其通过光远程触发的潜在应用之一。
Photoresponsive wormlike block copolymer nanoparticles (NPs) have potential applications in versatile fields, but their preparation suffers from narrow worm phase region and tedious approaches. In this work, azobenzene-containing wormlike NPs based on poly(methylacrylic acid)-b-poly(4-((4-butylphenyl)diazenyl)phenyl methacrylate) are prepared via polymerization induced self-assembly at high solids concentration in ethanol. The pure wormlike NPs occupy a remarkably broad region in the morphological phase diagram because of the rigid nature of the core-forming block. These wormlike NPs expand resulting from trans-cis transformation upon UV irradiation, and slim near to the original state via visible light irradiation. The diameter and its variation amplitude of worms increase with the chain length of core-forming block. Moreover, a nanofiltration switch for rhodamine B is assembled to illustrate one of its potential applications by remote trigger using light.