writer：Changxu Liu, Ming Wu, Lijie Duan, Nan Yan, Wei Jiang
keywords：分级胶体体, 嵌段共聚物胶束, 乳液界面受限, 中空结构, pH响应
source：期刊
specific source：Nanotechnology, 2022, 33(4), 045603
Issue time：2022年

摘要：将聚合物构筑单元分级自组装成高级胶体体，不仅有利于设计新颖纳米结构，也有利于跨多个长度尺度制造具有多功能性的复杂人造材料。尽管在分级胶体体设计方面已取得很大进展，但由嵌段共聚物（BCP）胶体纳米粒子自组装的聚合物胶体体制造仍具挑战。本文报道了通过水包1-丁醇乳液体系构建的乳液界面受限，由聚苯乙烯-b-聚2-乙烯基吡啶（PS-b-P2VP）BCP球形胶束自组装制备具有典型中空内部结构的分级聚合物胶体体。此外，分级胶体体可在酸性水溶液中解组装回原始均匀球形胶束，表明胶体体具有良好的pH刺激响应性。最后，通过交联原始球形胶束的P2VP冠层可大幅提高胶体体稳定性，为构建多功能材料提供有效模板。

Abstract：Hierarchical self-assembly of polymeric building blocks into high-level colloidosomes is desirable to not only design novel nanostructures but also fabricate the complex artificial materials across many length scales with multifunctionality. Although great progress has been made in designing the hierarchical colloidosomes, the fabrication of polymeric colloidosomes self-assembled from block copolymer (BCP) colloidal nanoparticles still remains challenge. Here, we report the fabrication of the hierarchical polymeric colloidosomes with typical hollow internal structures self-assembled from the polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) BCP spherical micelles through the emulsion interfacial confinement, which is constructed through the water-in-1-butanol emulsion system. Moreover, the hierarchical colloidosomes can disassemble into the original uniform spherical micelles under the acid aqueous solution, indicating that the colloidosomes possess good pH stimuli-responsibility. Finally, the stability of the colloidosomes can be greatly improved by cross-linking the P2VP corona of original spherical micelles, offering the effective templates for construction of the multifunctional materials.

论文链接：https://doi.org/10.1088/1361-6528/ac30f0