Composite material of Nano grains of silver and carriers of polymer microballons, and preparation method

A technology of silver nanoparticles and composite materials, applied in the field of nanomaterials and composite materials, can solve problems such as reducing the application range of materials, and achieve the effects of deodorizing part of ultraviolet rays, mild reaction, and improving load rate

Inactive Publication Date: 2007-12-26
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many current preparation methods of metal nano/polymer composites, the energy is concentrated on the preparation of metal nanoparticles, and the selec

Method used

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  • Composite material of Nano grains of silver and carriers of polymer microballons, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1: Add 0.039 mmol (162 mg) of styrene-terminated poly-N-isopropylacrylamide, 0.9 mmol (96 mg) of styrene, 3 mmol (159 mg) of acrylonitrile, and azobis Isobutyronitrile 0.039mmol (7mg), ethanol / water (volume ratio 7 / 3) mixed medium 5ml, ultrasonic vibration to make it fully dissolved, the mixed solution was refrigerated vacuum, thawing repeated three times or continue to pass high-purity nitrogen for 30min , and then seal the stoppered test tube, place it in a constant temperature shaking water bath at 60° C. with a vibration frequency of 160 r / min, and react for a predetermined time (20 hours). Take out the stoppered test tube, first centrifuge the reaction solution, redisperse it in the water medium, and further dialysis and purify it in the cellulose dialysis membrane for 5 days to remove impurities such as unreacted monomers, freeze-dry to obtain a polymer with a special shape on the surface Microspheres.

[0016] Second step: take by weighing the special form ...

Embodiment 2

[0018] Take by weighing 0.025mmol (460mg) of special form polymer microspheres obtained in the first step in Example 1, measure ethanol 28ml, water 12ml, add in a 100ml three-necked flask, stir and mix evenly, weigh silver nitrate 0.03~0.4mmol ( 5.1 ~ 68 mg), into the three-necked flask, after fully stirring for 2 hours, put the three-necked flask in a 65°C oil bath, react until the predetermined time (8 ~ 10 hours), take out the three-necked flask, cool naturally, take out the product after 7000r Centrifuge at 1 / min to remove the upper liquid, dissolve it in water, and centrifuge three times to obtain a stable dispersed silver nanoparticle / polymer microsphere composite material with a special shape. The particle size of the silver nanoparticle is about 10-50nm.

Embodiment 3

[0020] Step 1: Add 0.0234 mmol (196 mg) of styrene-terminated poly-N-vinylacetamide, 0.6 mmol (64 mg) of styrene, 3.3 mmol (175 mg) of acrylonitrile, and azobis Isobutyronitrile 0.039mmol (7mg), ethanol as the reaction medium 5ml, ultrasonic vibration to make it fully dissolved, the mixed solution was subjected to freezing vacuum, thawing and repeating three cycles or continuous high-purity nitrogen gas for 30min, and then sealed the stoppered test tube. Place the stoppered test tube in a constant temperature shaking water bath at 70°C with a vibration frequency of 120r / min, and react for a predetermined time (8 hours). Take out the stoppered test tube, first centrifuge the reaction solution, redisperse it in the water medium, and further dialysis and purify it in the cellulose dialysis membrane for 5 days to remove impurities such as unreacted monomers, freeze-dry to obtain a polymer with a special shape on the surface Microspheres.

[0021] The second step: Weigh 0.025mmol ...

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Abstract

The invention relates to compound materials of silver nano particles and the polymer microballoons carrier and its preparation method, and belongs to the nano materials and compound materials technology area. The invention takes the propylene nitrile and the styrene as the first, second monomer, takes the polyamide hydrophilicity macromonomer of the styrene sealed end as the disperses stabilizer, synthesizes the polyamide hydrophilicity macromonomer graft acrylonitrile/ styrene microsphere whose surface has the special form through the dispersion copolymerization method; takes the obtained microballoons as the carrier, in mellow or mellow aqueous medium used mellowly is the reducing agent, the soluble silver salt as the silver source, the silver ion coordinates with the amide groups of the macro-molecule chain side group on the microballoons surface, and reduces to the silver atom, and grows to form the compound materials of stable silver nano particles and the polymer microballoons carrier, the silver nano particles particle size is unceasingly 2-50nm, the distribution is homogeneous, the preparation method is easy and feasible, the response condition is temperate. The compound materials have the good Laman spectrum reinforcement and antibacterial, and may be used as the photosensitive material, the antibacterial material and the catalyzed material and so on.

Description

technical field [0001] The invention discloses a composite material of silver nanoparticles and polymer microsphere carrier and a preparation method thereof, belonging to the technical field of nanometer materials and composite materials. Background technique [0002] Silver nanoparticles can be widely used in photosensitive materials, electromagnetic materials, catalyst materials, antibacterial materials, and medical materials. However, due to the large specific surface area of ​​silver nanoparticles, they have high activity and are easily oxidized and agglomerated. The application value and application range of silver nanoparticles are reduced. The combination of polymer and metal nanomaterials can effectively prevent the oxidation and agglomeration of metal nanoparticles. At present, many preparation methods of metal nano / polymer composites focus on the preparation of metal nanoparticles, and the selected polymer is only for the use of its basic processing and forming pr...

Claims

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Application Information

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IPC IPC(8): B01J13/14B01J13/20B22F9/24B22F1/00
Inventor 陈明清范丽恒倪忠斌刘晓亚熊万斌王红艳王珂
Owner JIANGNAN UNIV
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