Controllable batch preparation method of organic/inorganic hybrid janus particles

Abstract

The invention discloses a method for preparing organic / inorganic hybrid Janus particles. The method comprises the following steps: 1) dispersing polymer hollow spherical particles in water to obtain a seed emulsion; 2) adding a silane coupling agent emulsion to the seed emulsion, performing polymerization reaction under mechanical stirring, and producing phase separation to obtain Janus particle emulsion; the silane coupling agent emulsion includes a silane coupling agent monomer and a polymerization initiator. 3) The Janus particle emulsion obtained in step 2) is spray-dried or freeze-dried to obtain Janus particles separated from organic and inorganic parts. The Janus granule structure prepared by the method of the invention can be precisely controlled, the ratio of the organic part and the inorganic part can be adjusted, the reaction is simple, and it can be produced in batches.

Description

technical field [0001] The invention relates to a preparation method of organic / inorganic hybrid Janus particles, in particular to a controllable batch preparation method of organic / inorganic hybrid Janus particles. Background technique [0002] The development of human society has always been marked by materials, and new materials play a vital role in promoting social progress. Janus materials are a class of new materials with special microstructure and functional properties. In recent years, due to their unique structure, dual properties and wide application prospects, they have become a new research hotspot in the field of materials. Janus materials refer to special new materials with a Janus structure. In a broad sense, as long as there is an asymmetric center, the particles can be called Janus particles, not only the asymmetry in the structure and morphology, but also the asymmetry in the composition. Based on this special property, Janus particles provide an ideal sci...

AI Technical Summary

Problems solved by technology

[0005] Janus materials with special microstructures have become a research hotspot in the field of materials science because they realize the integration and unification of two different or even opposite properties on a single particle. However, the complex structure determines the particularity of its preparation methods. Various Although many preparation methods have been reported, there are still problems in the existing methods for preparing Janus materials

For example, although the most commonly used interface protection method can achieve precise control of the structure of Janus materials, it is difficult to produce in batches; the composition of Janus materials prepared by the microfluidic method is strictly partitioned and has various shapes, but the size is large, and it is impossible to obtain submicron or even nanoscale materials. Materials; the process of template method is complicated and the preparation efficiency is low

The current methods that are easy to mass-produce are phase separation and interfacial nucleation, but it is difficult to achieve strict partitioning of chemical composition and fine control of microstructure in the prepared Janus materials.

Therefore, there is still a serious lack of fine-tuning methods for the strict partitioning and microstructure of Janus particle composition, morphology and chemical composition, and the large-scale preparation of Janus particles is still the biggest bottleneck restricting its wide application.

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