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Nano-silver/polystyrene hollow composite microspheres and preparation method thereof

A technology of polystyrene and composite microspheres, which is applied to the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., can solve the problems of large specific surface area of ​​nano-silver, influence on antibacterial properties of materials, and large number of surface atoms. Good monodispersity, easy implementation, and simple polymerization process

Active Publication Date: 2014-11-19
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the large specific surface area of ​​nano silver, large number of surface atoms, high surface energy, and a large number of surface defects, the agglomeration between particles is very easy to occur. After agglomeration, it is difficult to depolymerize it by mechanical means, which will greatly affect the material. antibacterial properties

Method used

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  • Nano-silver/polystyrene hollow composite microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of silica / polystyrene microspheres includes the following raw materials:

[0039] 8 parts styrene

[0040] 0.6 parts of γ-methacryloxypropyltrimethoxysilane

[0041] Tetraethyl silicate 5 parts

[0042] 0.6 parts of divinylbenzene

[0043] Hexadecane 0.8 parts

[0044] Azobisisobutyronitrile 0.15 parts

[0045] Methacrylic acid 1.6

[0046] 1 part acrylonitrile

[0047] Sodium dodecyl diphenyl ether disulfonate 0.01 parts

[0048] 95 parts of water

[0049] Ammonia water 1.5 parts (mass fraction 28%)

[0050] The specific preparation method is as follows:

[0051] Weigh styrene, hexadecane, γ-methacryloxypropyltrimethoxysilane, tetraethyl orthosilicate, divinylbenzene, methacrylic acid, and azobisisobutyronitrile as the oil phase, and weigh Dissolve sodium dodecylsulfonate in water as the water phase, slowly add the oil phase to the water phase after stirring and mixing evenly, and pre-emulsify with magnetic stirring at room temperature for 30 minu...

Embodiment 2

[0059]Preparation of silica / polystyrene microspheres includes the following raw materials:

[0060] 8 parts styrene

[0061] 0.8 parts of γ-methacryloxypropyltrimethoxysilane

[0062] Tetraethyl silicate 5 parts

[0063] 0.6 parts of divinylbenzene

[0064] Hexadecane 0.8 parts

[0065] Azobisisobutyronitrile 0.15 parts

[0066] Methacrylic acid 1.6

[0067] 1 part acrylonitrile

[0068] Sodium dodecyl diphenyl ether disulfonate 0.01 parts

[0069] 95 parts of water

[0070] Ammonia water 1.5 parts (mass fraction 28%)

[0071] The specific preparation method is as follows:

[0072] (with embodiment 1)

[0073] The raw material and concrete preparation method of preparing nano-silver / polystyrene hollow composite microspheres are as follows

[0074] (with embodiment 1)

Embodiment 3

[0076] Preparation of silica / polystyrene microspheres includes the following raw materials:

[0077] 8 parts styrene

[0078] 0.6 parts of γ-methacryloxypropyltrimethoxysilane

[0079] Tetraethyl silicate 5 parts

[0080] 0.6 parts of divinylbenzene

[0081] Hexadecane 0.8 parts

[0082] Azobisisobutyronitrile 0.15 parts

[0083] Methacrylic acid 1.6

[0084] Acrylonitrile 0 parts

[0085] Sodium dodecyl diphenyl ether disulfonate 0.01 parts

[0086] 95 parts of water

[0087] Ammonia water 1.5 parts (mass fraction 28%)

[0088] The specific preparation method is as follows:

[0089] (with embodiment 1)

[0090] The raw material and concrete preparation method of preparing nano-silver / polystyrene hollow composite microspheres are as follows

[0091] (with embodiment 1)

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Abstract

The invention discloses nano-silver / polystyrene hollow composite microspheres and a preparation method thereof. The preparation method comprises the following steps: by taking acrylic acid and acrylonitrile as functional monomers, preparing polystyrene microspheres of which the surfaces are jointly modified by carboxyl and nitrile groups by adopting a dual-in-situ miniemulsion polymerization process, preparing hollow polystyrene microspheres taking silicon dioxide as cores by utilizing the growing phase separation effect of polystyrene and tetraethyl orthosilicate, in-situ hydrolysis of tetraethyl orthosilicate and in-situ polymerization of styrene, then dropping silver nitrate, adsorbing silver ions by static electricity, and preparing the nano-silver / polystyrene hollow composite microspheres under the reduction action of hydrazine hydrate. The method provided by the invention has the advantages of simple process, mild conditions and easiness in control, the obtained microspheres are uniformly coated with nano-silver, and the coating rate is high.

Description

technical field [0001] The invention belongs to the field of inorganic / polymer composite materials, and in particular relates to nanometer silver / polystyrene hollow composite microspheres and a preparation method thereof. Background technique [0002] Antibacterial products are recognized as environmentally friendly and healthy products by countries all over the world. They are in great demand in domestic and foreign markets and are widely used in plastics, fibers, medical, construction, chemical and other fields; their use fundamentally eliminates the Cross-infection between people, people and things, things and things. At present, antibacterial materials are developing towards nano-antibacterial technology and inorganic / polymer nano-antibacterial materials. Nano-scale antibacterial materials refer to the preparation of nano-scale antibacterial agents through certain methods and technologies, and then compound them with antibacterial carriers to prepare materials with anti...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F230/08C08F212/36C08F220/06C08F220/46C01B33/12B01J13/14B01J13/00
Inventor 杨建军吴庆云张建安吴明元王云云
Owner ANHUI UNIVERSITY
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