Preparation method of nano silver antibacterial mother liquor through two-step polymerization

A technology of antibacterial mother and nano-silver, which is applied in the field of preparation of nano-silver antibacterial mother liquid, can solve problems such as complicated process and insufficient utilization of nano-silver, and achieve the effects of low preparation cost, low price and wide application range

Inactive Publication Date: 2011-08-31
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insufficient utilization of nano silver
In addition, during the preparation process, the emulsion was prepared many times, and nitrogen protection was performed, and the process was complicated.

Method used

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  • Preparation method of nano silver antibacterial mother liquor through two-step polymerization
  • Preparation method of nano silver antibacterial mother liquor through two-step polymerization
  • Preparation method of nano silver antibacterial mother liquor through two-step polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 450 mL of deionized water into a 1000 mL three-neck flask, add 2.5 g of sodium dodecylsulfonate (SDS), and start the stirrer to dissolve. Mix 46mL of styrene (PS) and 1mL of divinylbenzene (DVB), dissolve 0.5g of azobisisobutyronitrile (AIBN) in it, and add it into a three-necked flask after fully dissolved, the stirrer rotates at 400r / min, Emulsify for 10min. The temperature was raised to 120°C to initiate polymerization.

[0033] 2.5 hours after the reaction started, 3 mL of the second monomer N-vinylpyrrolidone (NVP) was added to the three-necked flask, and the polymerization was continued for 1 hour to obtain a polymer emulsion containing latex particles with a core-shell structure.

[0034] Dilute the polymer emulsion ten times to obtain a dilute emulsion with a monomer content of 1%. Take 900mL and put it in a beaker, add 50mL of silver nitrate solution with a concentration of 0.2mol / L to it, stir for 30min, and stir at room temperature and the speed of the s...

Embodiment 2

[0036] Add 453mL of deionized water into a 1000mL three-neck flask, add 2.0g of sodium dodecylsulfonate (SDS), and start the stirrer to dissolve. Dissolve 1.0 g of benzoyl peroxide (BPO) in 44 mL of methyl acrylate (MA), add it into a three-necked flask after fully dissolving, and emulsify for 10 min at a stirrer speed of 400 r / min. The temperature was raised to 100°C to initiate polymerization.

[0037] 3 hours after the reaction started, 3 mL of the second monomer 4-vinylpyridine (4VP) was added to the three-necked flask, and the polymerization was continued for 2.0 hours to obtain a polymer emulsion containing latex particles with a core-shell structure.

[0038] Dilute the polymer emulsion ten times to obtain a dilute emulsion with a monomer content of 0.94%. Take 900mL and put it into a beaker, add 50mL of silver nitrate solution with a concentration of 0.2mol / L to it, and stir for 30min. Add 50ml of sodium borohydride solution with a concentration of 0.5mol / L dropwise int...

Embodiment 3

[0040] Add 455mL of deionized water into a 1000mL three-neck flask, add 2.0g of sodium dodecylsulfonate (SDS), and start the stirrer to dissolve. Dissolve 1.0 g of azobisisobutyronitrile (AIBN) in 42 mL of methyl methacrylate (MMA), add it into a three-necked flask after fully dissolving, and emulsify for 10 min at a stirrer speed of 400 r / min. The temperature was raised to 80°C to initiate polymerization.

[0041] 2.0 h after the reaction started, 3 mL of the second monomer acrylic acid (AAC) was added to the three-necked flask, and the polymerization was continued for 1.2 h to obtain a polymer emulsion containing latex particles with a core-shell structure.

[0042] Dilute the polymer emulsion ten times to obtain a dilute emulsion with a monomer content of 0.9%. Take 900mL and put it into a beaker, add 50mL of silver nitrate solution with a concentration of 0.2mol / L to it, stir for 30min, and place it at 80°C with a stirrer 50 mL of sodium citrate solution with a concentrat...

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Abstract

The invention discloses a preparation method of a nano silver antibacterial mother liquor through two-step polymerization, belonging to the field of nano materials. The preparation method comprises the steps of: firstly initiating oil-soluble monomers to polymerize in an aqueous solution by using an oil-soluble initiator to obtain a polymer core; then adding water-soluble monomers to polymerize into a polymer shell; and adding silver nitrate and then reducing to finally obtain the nano silver antibacterial mother liquor with good antibiotic property. The nano silver antibacterial mother liquor uses core-shell-structure polymer latex particles as the carrier so that the mother liquor has good stability. The preparation method of the nano silver antibacterial mother liquor through two-step polymerization has low preparation cost and a simple production process; the silver nano particles are not easy to agglomerate and can exist stably for a long time; the latex cannot be deteriorated and can be stored for a long time; and meanwhile, the nano silver antibacterial mother liquor is not sensitive to pH and temperature, has a good antibacterial effect and a wide range for later-stage application. The nano silver antibacterial mother liquor is mixed with a commonly used commercial water-based paint so that the paint without an antibacterial effect has good antibacterial property; and meanwhile, the diluted nano silver antibacterial mother liquor is coated on the wall surface of the water-based paint so that the same extremely good antibacterial effect is detected.

Description

Technical field: [0001] The invention belongs to the field of nanometer materials and relates to a preparation method of nanometer silver antibacterial mother liquor. Background technique: [0002] Because inorganic nano-antibacterial agents have the characteristics of low dosage, durability and high efficiency, the development of environmentally friendly inorganic nano-antibacterial agents has attracted great attention from the business community and governments of various countries. Inorganic antibacterial materials have formed a considerable industrial scale at home and abroad, but compared with the rapidly developing industry, relevant basic research lags behind, especially the antibacterial mechanism and persistence of inorganic antibacterial materials, human body and environmental safety, microbial genetics Variation and key basic scientific issues such as how to prepare and use inorganic antibacterial materials in a targeted and selective manner need to be further stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00C08F212/08C08F212/36C08F226/10C08F220/14C08F226/06C08F220/06C23C18/44C09D7/12C09D5/14C08K3/08D01F1/10C09J11/04
Inventor 史林启李忠熊德安赵丽芝刘小俊刘赣安英丽马如江
Owner NANKAI UNIV
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