均聚物对非混相液体多室嵌段共聚物胶体相分离动力学的影响

IF 5.2 1区 化学 Q1 POLYMER SCIENCE
Kyuhyung Jo, Juyoung Lee, Jinhyeok Cho and Kang Hee Ku*, 
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引用次数: 0

摘要

多室复合胶体提供了具有各向异性特性的新型结构,这些特性源于不同组分之间的相互作用及其空间组织。将均聚物纳入嵌段共聚物(BCP)颗粒中,可以精确调整形状和相分离动力学,特别是在混合液-固体系中。本研究提出了一个由对称聚苯乙烯-b-2-乙烯基吡啶(PS-b-P2VP) bcp及其组成的均聚物和一种不混相油组成的复杂胶体的综合文库。通过系统地调整每个均聚物的体积分数、分子量和比例,我们实现了不同的颗粒形态,包括液体融合的细长子弹、球形圆顶、Janus结构和高尔夫球状多相构型。油和聚合物之间的强偏析,加上宿主域内较高的相容性,有利于层状层的轴向堆积成子弹状颗粒。精心平衡的均聚物的添加可以精确控制堆叠的畴尺寸,从而产生跨越整个可见光谱的结构颜色。相反,由于分子量和体积分数的增加,均聚物和bcp之间的强分离促进了多相硅油附着在颗粒表面。对颗粒演化的实时观察阐明了这些相分离的机制,为设计具有定制光学和结构特性的先进胶体结构铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of Homopolymers on Phase Separation Dynamics in Multicompartment Block Copolymer Colloids with Immiscible Liquids

Effect of Homopolymers on Phase Separation Dynamics in Multicompartment Block Copolymer Colloids with Immiscible Liquids

Multicompartment complex colloids offer novel architectures with anisotropic properties, which arise from the interplay between different components and their spatial organization. Incorporating homopolymers into block copolymer (BCP) particles allows for precise tuning of both shape and phase separation dynamics, particularly in mixed liquid–solid systems. This study presents a comprehensive library of complex colloids composed of symmetric poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) BCPs, their constituent homopolymers, and an immiscible oil. By systematically tuning the volume fraction, molecular weight, and ratio of each homopolymer, we achieve diverse particle morphologies, including liquid-merged elongated bullets, spherical domes, Janus structures, and golf-ball-like multiphase configurations. Strong segregation between oil and polymer, coupled with higher compatibilization within host domains, facilitates the axial stacking of lamellar layers into bullet-shaped particles. A carefully balanced addition of homopolymers enables precise control over the stacked domain sizes, resulting in structural colors that span the entire visible spectrum. In contrast, strong segregation between homopolymers and BCPs driven by increased molecular weight and volume fraction promotes multiphase silicone oils attached to the particle surface. Real-time observations of the particle evolution elucidate the mechanisms underlying these phase separations, paving the way for designing advanced colloidal architectures with tailored optical and structural properties.

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来源期刊
Macromolecules
Macromolecules 工程技术-高分子科学
CiteScore
9.30
自引率
16.40%
发文量
942
审稿时长
2 months
期刊介绍: Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.
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