A controllable batch preparation method of organic/inorganic hybrid Janus particles

Abstract

A controllable batch preparation method of organic / inorganic hybrid Janus particles is disclosed. The method includes 1) dispersing polymer hollow sphere particles into water to obtain a seed emulsion, 2) adding a silane coupling agent emulsion into the seed emulsion, polymerizing under mechanical stirring, and performing phase separation to obtain a Janus-particle emulsion, with the silane coupling agent emulsion comprising a silane coupling agent monomer and a polymerization initiator, and 3) preparing the Janus-particle emulsion obtained in the step 2) into the Janus particles with separated organic and inorganic parts by a spray drying manner or a freeze drying manner. The structure of the Janus particles prepared by the method can be accurately controlled, and the ratio of the organic part to the inorganic part is adjustable. The method is simple in reaction and can be applied to mass production.

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...

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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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