In Situ Synthesis of Coil–Coil Diblock Copolymer Nanotubes and Tubular Ag/Polymer Nanocomposites by RAFT Dispersion Polymerization in Poly(ethylene glycol),Macromolecules

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In Situ Synthesis of Coil–Coil Diblock Copolymer Nanotubes and Tubular Ag/Polymer Nanocomposites by RAFT Dispersion Polymerization in Poly(ethylene glycol)
Macromolecules ( IF 5.1 ) Pub Date : 2017-09-27 00:00:00 , DOI: 10.1021/acs.macromol.7b01363
Zhonglin Ding , Mingdu Ding , Chengqiang Gao , Cyrille Boyer ₁ , Wangqing Zhang

Affiliation

Hollow polymeric nanotubes have the potential to be employed as advanced nanomaterials in a variety of applications; however, their synthesis from the assembly of coil–coil diblock copolymers (DBCPs) has typically been limited. Herein, we report a novel method for synthesis of coil–coil DBCP nanotubes by implementing RAFT dispersion polymerization in low molecular weight poly(ethylene glycol) (PEG). This method for the in situ synthesis of coil–coil DBCP nanotubes is particularly versatile and can be achieved with a range of block copolymers including poly(N-isopropylacrylamide)-block-polystyrene (PNIPAM-b-PS), poly(4-vinylpyridine)-block-polystyrene (P4VP-b-PS), and poly(methyl methacrylate)-block-polystyrene (PMMA-b-PS). Using this approach, several interesting coil–coil DBCP tubular morphologies are observed, including single-wall nanotubes, multiwall nanotubes, and porous nanotubes. Furthermore, RAFT dispersion polymerization conducted in the presence of Ag nanoparticles can be used to yield complex tubular nanocomposites. The structure of these nanotubes such as the wall thickness and surface roughness can be tuned by varying the degree of polymerization (DP) of the solvophobic polystyrene block and/or the Ag fraction in the Ag/DBCP nanocomposites.

中文翻译：

聚乙二醇中RAFT分散聚合原位合成卷材-线圈二嵌段共聚物纳米管和管状Ag /聚合物纳米复合材料

空心聚合物纳米管有潜力在各种应用中用作先进的纳米材料。但是，它们通常是由线圈-线圈二嵌段共聚物（DBCP）组装而成的。在这里，我们报告了一种通过在低分子量聚乙二醇（PEG）中实施RAFT分散聚合反应来合成线圈-线圈DBCP纳米管的新方法。这种原位合成线圈螺旋DBCP纳米管的方法特别通用，可以通过一系列嵌段共聚物实现，包括聚（N-异丙基丙烯酰胺）-嵌段-聚苯乙烯（PNIPAM- b -PS），聚（4-乙烯基吡啶））-嵌段-聚苯乙烯（P4VP- b -PS）和聚（甲基丙烯酸甲酯）-嵌段-聚苯乙烯（PMMA- b -PS）。使用这种方法，观察到了几种有趣的线圈-线圈DBCP管状形态，包括单壁纳米管，多壁纳米管和多孔纳米管。此外，在银纳米颗粒存在下进行的RAFT分散聚合可用于产生复杂的管状纳米复合材料。这些纳米管的结构，例如壁厚和表面粗糙度，可以通过改变疏溶剂性聚苯乙烯嵌段和/或Ag / DBCP纳米复合材料中的Ag组分的聚合度（DP）来调整。

更新日期：2017-09-27

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