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One-Pot Synthesis of Cross-linked Block Copolymer Nanowires via Polymerization-Induced Hierarchical Self-Assembly and Photodimerization
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-12-11 , DOI: 10.1021/acsmacrolett.9b00868
Song Guan 1 , Aihua Chen 1
Affiliation  

Block copolymer (BCP) nanowires are crucially important in diversified fields. However, their applications typically suffer from a tedious fabrication process, heterogeneous morphology, and degradation. Herein, we propose a facile and robust approach to synthesize stilbene-containing BCP nanowires in homogeneous morphology with high stability at high solid content (5%–20% w/w) in one pot. It is realized by the polymerization-induced hierarchical self-assembly and subsequent photodimerization cross-linking under UV irradiation of stilbene mesogens in the core-forming block in the later stage of polymerization. Because of the strong liquid crystalline ordering and photodimerization of stilbene, the cross-linked nanowires can be obtained over a broad BCP composition, which show robust morphological stability when exposed to solvent dissolution tests and water dispersion stability tests. This efficient approach to stabilized nanowires with homogeneous morphology via in situ cross-linking would be useful in various fields, such as nanomedicine and Pickering emulsifiers.

中文翻译:

通过聚合诱导分层自组装和光二聚化一锅法合成交联嵌段共聚物纳米线

嵌段共聚物(BCP)纳米线在多元化领域中至关重要。然而,它们的应用通常受到繁琐的制造过程、异质形态和退化的影响。在此,我们提出了一种简便而稳健的方法,可以在一锅中合成具有均匀形态的含芪 BCP 纳米线,在高固含量(5%–20% w/w)下具有高稳定性。它是通过聚合诱导的分级自组装和随后的聚合后期在成核块中的二苯乙烯介晶在紫外线照射下的光二聚化交联来实现的。由于二苯乙烯的强液晶有序和光二聚化,可以在广泛的 BCP 组成上获得交联的纳米线,当暴露于溶剂溶解测试和水分散稳定性测试时,它们显示出强大的形态稳定性。这种通过原位交联稳定具有均匀形态的纳米线的有效方法将可用于各个领域,例如纳米医学和皮克林乳化剂。
更新日期:2019-12-11
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