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

A particle-inorganic technology, applied in the field of controllable batch preparation of organic/inorganic hybrid Janus particles, can solve the problem of difficult to achieve strict division of chemical composition and fine control of microstructure, inability to obtain sub-micron or even nano-scale materials, lack of Janus particle fine control method, etc., to achieve high industrial application potential, realize batch industrial production, and facilitate multi-functionalization.

Inactive Publication Date: 2016-03-30
INST OF CHEM CHINESE ACAD OF 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 h

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

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preparation example Construction

[0050] Based on the present invention, the present invention provides organic / inorganic hybrid Janus particles with separated organic and inorganic parts and methods for their preparation, such as figure 1 As shown, it is a schematic diagram of the preparation process of organic / inorganic hybrid Janus particles prepared by the present invention. The organic / inorganic hybrid Janus particles provided by the present invention are prepared by emulsion polymerization. The method comprises the steps of:

[0051] 1) dispersing polymer hollow spherical particles in water to obtain seed emulsion;

[0052] 2) Add the silane coupling agent emulsion to the seed emulsion, carry out the polymerization reaction under mechanical stirring, and produce phase separation to obtain the Janus particle emulsion; the silane coupling agent emulsion includes the silane coupling agent monomer and the polymerization initiator .

[0053] 3) The Janus particle emulsion obtained in step 2) is spray-dried ...

Embodiment 1

[0057] Add 20 g of deionized water to 2.667 g of linear polystyrene (PS) hollow sphere emulsion with a solid content of 37.5%, and mechanically stir to form a uniform seed sphere emulsion (with a solid content of 4.41%). Adopt 2.0g oil-soluble silane coupling agent monomer (3-(methacryloxy) propyltrimethoxysilane (MPS)), initiator (1% potassium persulfate solution (KPS)) 2.0g, 0.02g Surfactant (sodium dodecyl sulfate (SDS)) and 10g deionized water ultrasonically form a homogeneous silane coupling agent monomer emulsion (silane coupling agent monomer 14.2%, initiator 1.42‰; surfactant 1.42‰, The balance is water). The rotation speed is 400rpm and mechanical stirring is performed, the seed emulsion is heated to 70°C, and the above-mentioned silane coupling agent monomer emulsion is added to the seed ball emulsion at a speed of 2.5rpm with a mechanical peristaltic pump. Under continuous mechanical stirring, the whole system was polymerized at 70° C. for 24 hours. At the beginni...

Embodiment 2

[0059] Add 10 g of deionized water to 2.667 g of linear polystyrene (PS) hollow sphere emulsion with a solid content of 37.5%, and mechanically stir to form a uniform seed sphere emulsion (with a solid content of 4.41%). Adopt 1.0g oil-soluble silane coupling agent monomer (3-(methacryloyloxy) propyltrimethoxysilane (MPS)), initiator (1% potassium persulfate solution (KPS)) 2.0g, surface activity Agent (sodium dodecyl sulfate (SDS)) 0.02g and 10g deionized water ultrasonically form a homogeneous monomer emulsion (silane coupling agent monomer 14.2%, initiator 1.42‰; surfactant 1.42‰, the balance is water ). The rotation speed is 400rpm and mechanical stirring is performed, the seed emulsion is heated to 70° C., and the silane coupling agent monomer emulsion is added to the seed ball emulsion at a speed of 2.5 rpm with a mechanical peristaltic pump. Under continuous mechanical stirring, the whole system was polymerized at 70° C. for 24 hours to obtain a silica / polystyrene Janu...

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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...

Claims

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Application Information

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IPC IPC(8): C08F257/02C08F230/08C08F285/00C08F212/36C08F222/16C08F2/26C08F8/12B01F17/52C09K23/52
CPCC08F212/36C08F2/26C08F222/16C08F257/02C08F8/12C08F285/00C08F230/085
Inventor 孙怡菁张成亮杨振忠
Owner INST OF CHEM CHINESE ACAD OF SCI
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