Jingcheng Xu, Yulun Wu, Yu Xia, Rida Fatima, Yuesheng Li and Dong-Po Song*,
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引用次数: 0
摘要
之前通过有组织自发乳化(OSE)机制对两亲性瓶丛嵌段共聚物(BBCPs)的光子颜料进行的研究仅限于使用聚乙二醇(PEG)作为亲水侧链和甲苯作为有机相。本文以 PVP 为亲水嵌段,合成了一系列聚苯乙烯-嵌段-聚乙烯吡咯烷酮(PS-b-PVP)BBCPs。使用生物相容性和可持续发展的苯甲醚溶解所获得的 BBCP,然后将溶液乳化在水中。随后水包油乳液液滴的蒸发触发了 OSE 机制,通过 BBCPs 在水包油界面的组装,产生了热力学上稳定的水包油(w/o/w)多重乳液,其内部液滴阵列均匀且紧密。凝固后,光子微粒内部形成均匀的多孔结构,呈现出可见的结构颜色。通过改变 BBCP 的聚合度(69∼110),孔径可进行大范围调节(150∼314 nm),从而在整个可见光谱范围内形成可调节的颜色。这项工作提供了有用的知识,即 OSE 可普遍用于制造具有可调内部官能团的有序多孔材料,不仅可用于光子应用,还为催化、传感、分离、封装等提供了一个潜在的平台。
Photonic Pigments of Polystyrene-block-Polyvinylpyrrolidone Bottlebrush Block Copolymers via Sustainable Organized Spontaneous Emulsification
Prior studies on photonic pigments of amphiphilic bottlebrush block copolymers (BBCPs) through an organized spontaneous emulsification (OSE) mechanism have been limited to using polyethylene glycol (PEG) as the hydrophilic side chains and toluene as the organic phase. Herein, a family of polystyrene-block-polyvinylpyrrolidone (PS-b-PVP) BBCPs are synthesized with PVP as the hydrophilic block. Biocompatible and sustainable anisole is employed for dissolving the obtained BBCPs followed by emulsification of the solutions in water. Subsequent evaporation of oil-in-water emulsion droplets triggers the OSE mechanism, producing thermodynamically stable water-in-oil-in-water (w/o/w) multiple emulsions with uniform and closely packed internal droplet arrays through the assembly of the BBCPs at the w/o interface. Upon solidification, the homogeneous porous structures are formed within the photonic microparticles that exhibit visible structural colors. The pore diameter is widely tunable (150∼314 nm) by changing the degree of polymerization of BBCP (69∼110), resulting in tunable colors across the whole visible spectrum. This work demonstrates useful knowledge that OSE can be generally used in the fabrication of ordered porous materials with tunable internal functional groups, not only for photonic applications, but also offers a potential platform for catalysis, sensing, separation, encapsulation, etc.
期刊介绍:
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.