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

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-03-17 DOI:10.1021/acs.macromol.5c0006410.1021/acs.macromol.5c00064

Kyuhyung Jo, Juyoung Lee, Jinhyeok Cho and Kang Hee Ku*,

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引用次数: 0

Abstract

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 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.