具有两亲性侧链的高接枝密度核壳瓶丛聚合物的合成与自组装

IF 4.5 3区 工程技术 Q1 CHEMISTRY, APPLIED
Jiawei Zhang , Xiaoyan Yuan , Zongquan Wu , Lixia Ren
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引用次数: 0

摘要

瓶丛聚合物的自组装在光子带隙材料、生物医学材料和不同结构的纳米材料中被广泛研究。本研究通过接枝法制备了高接枝密度瓶丛聚合物,其两亲性 QPDMA[FeCl4]-b-PS 侧链接枝在主链的每个碳原子上。设计并合成了用链转移剂(CTA)修饰的对位异氰酸酯单体,从而制备出在每个原子上都接枝了 CTA 的聚合物骨架。通过甲基丙烯酸二甲胺基乙酯和苯乙烯的顺序可逆加成-断裂链转移聚合,制备了核壳瓶丛嵌段共聚物。内核经过季铵化和离子交换形成水溶性 QPDMA[FeCl4] 磁性嵌段。由此得到的核壳底层磁性聚合物(PCN-g-[QPDMA[FeCl4]-b-PS])在壳选溶剂二氯甲烷中自组装成以磁性 QPDMA[FeCl4] 为核,以 PS 为冕的纳米线,纳米线的长度随自组装时间的延长而增加。纳米线的长度随着自组装时间的延长而增加,而在选芯水溶液中则自组装成纳米粒子簇。而且,自组装形态会影响热性能和磁性能。特别是制备的 PCN-g-[QPDMA[FeCl4]-b-PS]和纳米粒子团簇自组装是顺磁性的,而纳米线自组装是超顺磁性的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis and self-assembly of high grafting density core-shell bottlebrush polymer with amphiphilic side chain

Synthesis and self-assembly of high grafting density core-shell bottlebrush polymer with amphiphilic side chain

Self-assembly of bottlebrush polymers are widely studied in photonic bandgap materials, biomedical materials and nanomaterial with different structures. In this work, high grafting density bottlebrush polymer with amphiphilic QPDMA[FeCl4]-b-PS side chains grafting on every carbon atom of the backbone are prepared via grafting from approach. The para-isocyanobenzoate monomer modified with chain transfer agent (CTA) is designed and synthesized to prepared polymer backbones with CTA grafting on each atoms. The core-shell bottlebrush block copolymer is prepared by sequential reversible addition-fragmentation chain transfer polymerization of dimethylaminoethyl methacrylate and styrene. The inner core follows quaternization and ion exchange to form water soluble QPDMA[FeCl4] magnetic block. The resulting core-shell bottlebrush magnetic polymer (PCN-g-[QPDMA[FeCl4]-b-PS]) self-assembles into nanowires with magnetic QPDMA[FeCl4] as core and PS as corona in the shell selected solvent dichloromethane, the length of nanowires increases with self-assembly time. While it self-assembles into nanoparticle clusters in core selected aqueous solution. And, the thermal and magnetic properties are affected by the self-assembly morphology. Especially, the as prepared PCN-g-[QPDMA[FeCl4]-b-PS] and the nanoparticles cluster self-assembly are paramagnetic, but the nanowire self-assembly is superparamagnetic.

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来源期刊
Reactive & Functional Polymers
Reactive & Functional Polymers 工程技术-高分子科学
CiteScore
8.90
自引率
5.90%
发文量
259
审稿时长
27 days
期刊介绍: Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.
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