Amphiphilic polymer/ Ag nano composite microsphere preparation method

Abstract

The invention belongs to the preparation field of organic inorganic nano composite materials, and mainly relates to an amphiphilic polymer / Ag nano composite microsphere preparation method. According to the method, polymer microspheres with surface silicon hydroxyl can be prepared by copolymerization of vinyl monomer and organic siloxane by miniemulsion polymerization, a silver salt compound is added for in situ production of nano Ag on the surface of polysiloxane microspheres by virtue of self reduction of polysiloxane to realize polymer / Ag nano composite microsphere preparation. The prepared polymer / Ag nano composite microsphere overcomes the problems that nano Ag is easy to agglomerate and difficult to disperse, and polymer is poor in compatibility and the like, and can be widely used in the fields of antibacterial materials, photocatalytic materials and the like.

Description

technical field

[0001] The invention belongs to the field of preparation of organic-inorganic nano composite materials, mainly relates to a preparation method of polymer / Ag nano composite microspheres, and belongs to the field of preparation of nano composite microspheres. Background technique

[0002] Nano-silver has excellent electrical conductivity, heat transfer, surface activity, catalytic and antibacterial properties, etc., and has a wide range of applications in the fields of optics, catalysis, microelectronics, biosensing, and antibacterial. In recent years, the preparation technology of nano-silver has developed rapidly, and the preparation methods are various. According to the reaction conditions, they can be divided into chemical reduction method, microemulsion method, reverse micelle method, thermal decomposition method, template method and so on. However, due to the large specific surface area and high specific surface energy of nano-silver particles, oxidation ...

Examples

Embodiment 1

[0029] Weigh 0.25g SDS, 0.15g sodium bicarbonate, 0.15g sodium dihydrogen phosphate, dilute with 100g deionized water, and transfer to a 250ml four-necked bottle equipped with a stirring device, a thermometer and a reflux condensing device (component A); Take 10.0g of styrene (St) monomer, 0.5g of HD, 0.1g of AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-necked flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5 hours, and prepare blank polystyrene microspheres.

[0030] Take out 5g of the above-mentioned styrene emulsion, dilute it with 50g deionized water, and transfer it to a 250ml four-necked bottle equipped with a stirrin...

Embodiment 2

[0032] Weigh 0.25g SDS, 0.15g sodium bicarbonate (NaHCO3), 0.1g sodium dihydrogen phosphate (NaHCO 2 PO4), diluted with 100g of deionized water, transferred to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device (component A); weigh 10.0g of 3-methacryloxypropyltrimethoxysilane (MEMO), 0.5gHD, 0.1g AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5h, and prepare PS-MEMO microspheres with reductive surface silylation.

[0033] Take out 5g of the above-mentioned copolymerized emulsion, dilute it with 50g deionized water, transf...

Embodiment 3

[0035] Weigh 0.25g SDS, 0.15g sodium bicarbonate (NaHCO3), 0.1g sodium dihydrogen phosphate (NaHCO 2 PO4), diluted with 100g of deionized water, transferred to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device (component A); weigh 10.0g of 3-methacryloxypropyltrimethoxy Silane (MEMO), 0.5g HD, 0.1g AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5h, and prepare PS-MEMO microspheres with reductive surface silylation.

[0036] Take out 5g of the above-mentioned copolymerized emulsion, dilute it with 50g deionized water, tran...

technical field

[0001] The invention belongs to the field of preparation of organic-inorganic nano composite materials, mainly relates to a preparation method of polymer / Ag nano composite microspheres, and belongs to the field of preparation of nano composite microspheres. Background technique

[0002] Nano-silver has excellent electrical conductivity, heat transfer, surface activity, catalytic and antibacterial properties, etc., and has a wide range of applications in the fields of optics, catalysis, microelectronics, biosensing, and antibacterial. In recent years, the preparation technology of nano-silver has developed rapidly, and the preparation methods are various. According to the reaction conditions, they can be divided into chemical reduction method, microemulsion method, reverse micelle method, thermal decomposition method, template method and so on. However, due to the large specific surface area and high specific surface energy of nano-silver particles, oxidation ...

Examples

Embodiment 1

[0029] Weigh 0.25g SDS, 0.15g sodium bicarbonate, 0.15g sodium dihydrogen phosphate, dilute with 100g deionized water, and transfer to a 250ml four-necked bottle equipped with a stirring device, a thermometer and a reflux condensing device (component A); Take 10.0g of styrene (St) monomer, 0.5g of HD, 0.1g of AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-necked flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5 hours, and prepare blank polystyrene microspheres.

[0030] Take out 5g of the above-mentioned styrene emulsion, dilute it with 50g deionized water, and transfer it to a 250ml four-necked bottle equipped with a stirrin...

Embodiment 2

[0032] Weigh 0.25g SDS, 0.15g sodium bicarbonate (NaHCO3), 0.1g sodium dihydrogen phosphate (NaHCO 2 PO4), diluted with 100g of deionized water, transferred to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device (component A); weigh 10.0g of 3-methacryloxypropyltrimethoxysilane (MEMO), 0.5gHD, 0.1g AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5h, and prepare PS-MEMO microspheres with reductive surface silylation.

[0033] Take out 5g of the above-mentioned copolymerized emulsion, dilute it with 50g deionized water, transf...

Embodiment 3

[0035] Weigh 0.25g SDS, 0.15g sodium bicarbonate (NaHCO3), 0.1g sodium dihydrogen phosphate (NaHCO 2 PO4), diluted with 100g of deionized water, transferred to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device (component A); weigh 10.0g of 3-methacryloxypropyltrimethoxy Silane (MEMO), 0.5g HD, 0.1g AIBN (component B), stir well and transfer to the dropping funnel. Slowly add component B to component A dropwise at room temperature, and continue to stir for 0.5h to emulsify after the addition. Take out the above mixed components and ultrasonically fine emulsify for 10min. Continue to transfer to a 250ml four-neck flask equipped with a stirring device, a thermometer and a reflux condensing device, slowly raise the temperature to 70°C, polymerize for 5h, and prepare PS-MEMO microspheres with reductive surface silylation.

[0036] Take out 5g of the above-mentioned copolymerized emulsion, dilute it with 50g deionized water, tran...

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