Snowman-shaped Janus particles and preparation method thereof

A particle and snowman technology, applied in the field of snowman-shaped Janus particles and its preparation, can solve the problems of poor comprehensive performance such as weather resistance, water resistance, oil resistance, strength, etc., and achieve the effects of narrow particle size distribution, simple operation and high production efficiency

Active Publication Date: 2020-10-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the preparation methods of Janus materials are too numerous to enumerate, how to realize the fine control of the structure of Janus materials, strict chemical partitioning and batch preparation is still one of the difficulties in the field of Janus. The existing Janus materials have good weather resistance, water resistance and oil resistance , strength and other comprehensive properties are poor

Method used

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  • Snowman-shaped Janus particles and preparation method thereof

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preparation example Construction

[0037]The present invention also provides a kind of preparation method of snowman shape Janus particle, comprises the following steps:

[0038] S1, preparing polybutylacrylate / polyethylene glycol dimethacrylate (PBA / PEGDMA) seed emulsion;

[0039] S2. Heat the PBA / PEGDMA seed emulsion to 65-75°C, and slowly add the silane coupling agent monomer emulsion to the PBA / PEGDMA seed emulsion at a constant temperature and stirring speed of 100-800r / min, and react at a constant temperature for 18- 24h;

[0040] S3. After the constant temperature reaction is finished, centrifuge to obtain the product, and first use ethanol to wash centrifugally, then after centrifugally wash with water, freeze-dry to obtain organic / inorganic composite snowman-shaped Janus particles, the hydrophilic end of organic / inorganic composite snowman-shaped Janus particles is two Silicon oxide with hydrophobic ends ethylene glycol dimethacrylate / polybutyl acrylate.

[0041] Specifically, in the above S1, the st...

Embodiment 1

[0062] The present embodiment provides a kind of snowman shape Janus particle, and the preparation method is as follows:

[0063] 240 g of secondary water was added to 20 g of linear polybutylacrylate seed emulsion with a solid content of 37.5 wt.%, and ultrasonically dispersed to obtain a uniform seed emulsion. 4.5g crosslinking agent ethylene glycol dimethacrylate (EGDMA), 0.045g oily initiator azobisisobutyronitrile (AIBN), 0.072g surfactant sodium dodecyl sulfate (SDS) and 30g secondary Water, after mixing, ultrasonically emulsify to obtain a monomer emulsion. Add the homogeneously dispersed monomer emulsion into the seed emulsion and ultrasonically disperse it uniformly, stir and swell at 25°C and 300r / min for 8h, then raise the temperature to 70°C, and react at constant temperature for 12h to obtain EGDMA cross-linked PBA / PEGDMA seed emulsion with good solvent resistance.

[0064] Take 49.2 g of the above-mentioned cross-linked PBA / PEGDMA hollow emulsion as seed emuls...

Embodiment 2

[0067] The present embodiment provides a kind of snowman shape Janus particle, and the preparation method is as follows:

[0068]240 g of secondary water was added to 20 g of linear polybutylacrylate seed emulsion with a solid content of 37.5 wt.%, and ultrasonically dispersed to obtain a uniform seed emulsion. 4.5g crosslinking agent ethylene glycol dimethacrylate (EGDMA), 0.045g oily initiator azobisisobutyronitrile (AIBN), 0.072g surfactant sodium dodecyl sulfate (SDS) and 30g secondary Water, after mixing, ultrasonically emulsify to obtain a monomer emulsion. Add the homogeneously dispersed monomer emulsion into the seed emulsion and ultrasonically disperse it uniformly, stir and swell at 25°C and 300r / min for 8h, then raise the temperature to 70°C, and react at constant temperature for 12h to obtain EGDMA cross-linked PBA / PEGDMA seed emulsion with good solvent resistance.

[0069] Take 49.2 g of the above-mentioned cross-linked PBA / PEGDMA hollow emulsion as seed emulsi...

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Abstract

The invention discloses snowman-shaped Janus particles and a preparation method thereof, belongs to the technical field of Janus particles, and solves the problems of non-strict chemical partition andpoor strength and toughness of a Janus material in the prior art. The snowman-shaped Janus particles are organic / inorganic composite snowman-shaped Janus particles, the hydrophilic ends of the organic / inorganic composite snowman-shaped Janus particles are silicon dioxide, and the hydrophobic ends of the organic / inorganic composite snowman-shaped Janus particles are ethylene glycol dimethacrylate / polybutyl acrylate. The preparation method of the snowman-shaped Janus particles comprises the following steps of: preparing a polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion; slowly dropwise adding a silane coupling agent monomer emulsion into the polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion, and carrying out a constant-temperature reaction for 18-24 h;centrifuging to obtain a product, centrifugally washing the product, and freeze-drying the product to obtain the organic / inorganic composite snowman-shaped Janus particles. The snowman-shaped Janus particles are uniform in particle size, high in strength and toughness and good in oil resistance and chemical resistance.

Description

technical field [0001] The invention relates to the technical field of Janus granules, in particular to a snowman-shaped Janus granule and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the demand for diversified materials is increasing, and the traditional materials with simple composition, single structure and function are becoming more and more difficult to meet the needs of human beings. Finding a new type of material that can satisfy multiple compositions and functions on the same material surface has become the research direction of many scientific researchers, so Janus material came into being. In the past ten years, the preparation methods, properties and applications of Janus materials have been developed rapidly. It has broad application prospects. [0003] Janus materials refer to two relative or opposite properties (such as hydrophilic / hydrophobic, polar / nonpolar, magnetic / nonmagnetic, positive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F230/08C08F265/06C08F222/14
CPCC08F265/06C08F285/00C08F230/08C08F222/102
Inventor 杜德明梁福鑫邱东杨振忠
Owner INST OF CHEM CHINESE ACAD OF SCI
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