A slow-release antibacterial molecular cluster resin and its preparation method and application

A molecular cluster and slow-release technology, applied in the field of antibacterial materials, can solve the problems of high cost, achieve long life, strong controllable slow-release, and inhibit bacterial reproduction

Active Publication Date: 2021-12-31
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For ozone sterilization, the cost is higher

Method used

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  • A slow-release antibacterial molecular cluster resin and its preparation method and application
  • A slow-release antibacterial molecular cluster resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of polystyrene microspheres: Take 40 mL of styrene monomer that has been eluted by pretreatment, weigh 0.42 g of free radical initiator azobisisobutyronitrile, and 1.68 g of dispersant polyvinylpyrrolidone, Add to 180mL absolute ethanol and 20mL deionized water, stir at 300r / min, and react at 70°C for 8h under nitrogen. After the reaction, the reaction product was centrifuged / washed with ethanol (three cycles), and then vacuum-dried for 24 hours (60° C.) to obtain PS microspheres.

[0033] (2) Preparation of molecular cluster resin: add dry PS microspheres to a mixed solution consisting of concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 2:3, stir at 400r / min, and react at 40°C for 2h . The product was filtered, centrifuged, and dried for 24 hours (50°C) to obtain light yellow nitropolystyrene microspheres (PS-NO 2 ). Then add 30mL 0.2mol / L NaOH aqueous solution and 2g Na 2 S 2 o 4 , stirred at 400r / min at 75°C for 4h, a...

Embodiment 2

[0036] (1) Preparation of polystyrene microspheres: Take 40 mL of styrene monomer that has been eluted by pretreatment, weigh 0.38 g of free radical initiator azobisisobutyronitrile, and 1.42 g of dispersant polyvinylpyrrolidone, Add it into 160mL of absolute ethanol and 40mL of deionized water, stir at 500r / min, and react at 70°C for 8h under nitrogen. After the reaction, the reaction product was centrifuged / washed with ethanol (three cycles), and then vacuum-dried for 24 hours (60° C.) to obtain PS microspheres.

[0037] (2) Preparation of molecular cluster resin: add dry PS microspheres to a mixed solution consisting of concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 2:3, stir at 400r / min at a stirring speed of 40°C for 3h . The product was filtered, centrifuged, and dried for 24 hours (50°C) to obtain light yellow nitropolystyrene microspheres (PS-NO 2 ). Then add 40mL of 0.2mol / L NaOH aqueous solution and 3g Na 2 S 2 o 4 , stirred at 4...

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Abstract

The invention belongs to the field of antibacterial materials, and discloses a slow-release antibacterial molecular cluster resin, a preparation method and application thereof. Add aminopolystyrene microspheres and polyacrylic acid to ethanol solution, stir and reflux reaction under inert atmosphere, the product is washed and dried to obtain PS-PAA molecular cluster resin; then mixed with silver nitrate solution, adding reducing agent to react, the The silver that has been grafted on the PS-PAA molecular cluster resin is reduced to obtain nano-silver, and a slow-release antibacterial molecular cluster resin is obtained. According to the invention, the dendritic active group in the molecular cluster resin is closely combined with the nanometer silver, and the obtained product has excellent antibacterial properties and slow-release properties, and can be used for antibacterial in drinking water.

Description

technical field [0001] The invention belongs to the field of antibacterial materials, and in particular relates to a slow-release antibacterial molecular cluster resin and its preparation method and application. Background technique [0002] With the improvement of people's living standards, the requirements for drinking water are also getting higher and higher. At present, people's drinking water is generally tap water or bottled water. Although tap water and bottled water have been sterilized, during the long-term transportation and filling process, if the sterilization and disinfection are not thorough in the early stage, bacteria will still grow. endanger human health. [0003] At present, the commonly used drinking water disinfection methods can be divided into physical methods and chemical methods. The physical method is mainly through ultraviolet irradiation, and the chemical method can be divided into chlorine sterilization and ozone sterilization according to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00A01N37/10A01N59/00A01P1/00A01P3/00
CPCC08G83/001A01N37/10A01N59/00
Inventor 肖凯军张雨涵银玉容
Owner SOUTH CHINA UNIV OF TECH
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