Expanding the Scope of Polymerization-Induced Self-Assembly: Z-RAFT-Mediated Photoinitiated Dispersion Polymerization
Expanding the Scope of Polymerization-Induced Self-Assembly: Z-RAFT-Mediated Photoinitiated Dispersion Polymerization
复制标题
扩大聚合诱导自组装的范围：Z-RAFT 介导的光引发分散聚合
DOI：
10.1021/acsmacrolett.8b00035
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发表时间：
2018
影响因子：
5.8
通讯作者：
Zhang Li
中科院分区：
文献类型：
--
作者：
Tan Jianbo;Li Xueliang;Zeng Ruiming;Liu Dongdong;Xu Qin;He Jun;Zhang Yuxuan;Dai Xiaocong;Yu Liangliang;Zeng Zhaohua;Zhang Li
在本通讯中，我们开发了第一个良好控制的Z-RAFT（RAFT =可逆加成-断裂链转移）介导的聚合诱导自组装（比萨）配方的基础上光引发RAFT分散聚合的丙烯酸叔丁酯（tBA）在乙醇/水（60/40，w/w）在室温下使用Z型大分子链转移剂（macro-CTA）。通过暴露于可见光照射（405 nm，0.45 mW/cm 2）快速进行聚合，在1小时内实现高单体转化率（>95%）。通过该Z-RAFT介导的比萨制剂制备了具有窄摩尔质量分布的各种聚合物纳米物体（球体、蠕虫和囊泡）。通过原位还原法将泡囊负载在银纳米粒子上，可用于NaBH 4存在下亚甲基蓝（MB）的还原。最后，凝胶渗透色谱（GPC）分析表明，电晕块和核形成块可以通过处理过量的引发剂裂解。这种新的比萨公式将大大扩展比萨的范围，并提供更多的机制见解的比萨研究。
In this communication, we developed the first well-controlled Z-RAFT (RAFT = reversible addition–fragmentation chain transfer) mediated polymerization-induced self-assembly (PISA) formulation based on photoinitiated RAFT dispersion polymerization oftert-butyl acrylate (tBA) in ethanol/water (60/40, w/w) at room temperature using a Z-type macromolecular chain transfer agent (macro-CTA). Polymerizations proceeded rapidly via the exposure of visible-light irradiation (405 nm, 0.45 mW/cm2) with high monomer conversion (>95%) being achieved within 1 h. A variety of polymer nano-objects (spheres, worms, and vesicles) with narrow molar mass distributions were prepared by this Z-RAFT mediated PISA formulation. Silver nanoparticles were loaded with the vesicles via in situ reduction, which can be used as a catalyst for the reduction of methylene blue (MB) in the presence of NaBH4. Finally, gel permeation chromatography (GPC) analysis demonstrated that the corona block and the core-forming block could be cleaved by treating with excess initiator. This novel PISA formulation will greatly expand the scope of PISA and provide more mechanistic insights into the PISA research.