中科院化学所的刘冰课题组近日通过框架导向合成了一类聚合物胶体圆盘。2021年1月20日，国际知名学术期刊《美国化学会杂志》发表了这一成果。

在该文中，研究团队报告了一种新的策略，该策略用基于框架引导的液滴收缩来合成聚合物圆盘。这一策略是通过创造一个框架/液体的核/壳环，并利用液体环的收缩不稳定性实现的。通过该策略合成的圆盘的形状参数是可调的。

该方法具有普适性，并不局限于特定的聚合物、溶剂和框架，因此该方法有潜力制作一系列聚合物圆盘。课题组人员还演示了通过表面引发的聚合反应来调节圆盘表面化学性质的可能性。这种框架诱导的液滴收缩法为设计和制造盘状粒子打开新的途径。

据介绍，各向异性的胶体颗粒是自组装研究的重要组成部分，它们为基础研究提供了可视化的模型，并可以用来制造有结构的材料。胶体圆盘是最典型的各向异性胶体之一，但合成具有特定形状的单分散胶体圆盘尚存在许多挑战。

附：英文原文

Title: Frame-Guided Synthesis of Polymeric Colloidal Discs

Author: Na Qu, Zhang Luo, Shuping Zhao, Bing Liu

Issue&Volume: January 20, 2021

Abstract: Anisotropic colloidal particles are important building blocks for the studies of self-assembly, which are visualized models for basic research and can be used to construct structured materials. Discs are one of the most typical anisotropic colloids; however, the synthesis of monodisperse colloidal discs with well-defined shape remains a challenge. Here we report a novel strategy for synthesizing polymeric discs based on frame-guided droplet shrinkage. This was realized by creating frame/liquid core/shell rings and utilizing the shrinking instability of the liquid rings. The resulting disc’s shape parameters are tunable. The method is general, is not limited to specific polymers, solvents, and frames, and therefore has the potential to afford a variety of polymer discs. We also demonstrate the possibility of tuning the surface chemistry of the discs through surface-initiated polymerization. The frame-guided droplet shrinkage method opens up a new way to design and fabricate colloidal particles.

DOI: 10.1021/jacs.0c08627

Source: https://pubs.acs.org/doi/10.1021/jacs.0c08627