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Nano-polymer antibacterial agent and preparation method thereof

A nano-polymer and antibacterial agent technology, which is applied in the field of nano-polymer antibacterial agent and its preparation, can solve the problems of difficult to obtain products in large quantities, large particle size, high equipment requirements, etc., and achieve narrow particle size distribution range and huge specific surface area , the effect of a wide range of applications

Inactive Publication Date: 2014-04-02
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently reported antibacterial polymers are obtained through solution polymerization, radiation polymerization or surface modification of polymers, and they all have some insurmountable deficiencies, such as solution polymerization often involves a difficult and energy-intensive post-treatment process to remove solvents , the particle size obtained by radiation polymerization is large and requires high equipment, and it is difficult to obtain products in large quantities through polymer modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Add 45 g of water and 3 g of methacryloyloxyethyl dodecyl dimethyl bromide to a 150 mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer Ammonium was then heated to 40°C and stirred at a speed of 400 r / min to dissolve, then 30 g of methyl methacrylate was added and stirred at a speed of 1000 r / min to emulsify and disperse, while nitrogen bubbling was used to remove oxygen. After 45 minutes, heat up to 60°C, then add 5 mL of aqueous solution containing 0.3 g of azobisisobutylamidine hydrochloride, maintain 65°C and a stirring speed of 450 r / min under nitrogen protection, and react for 3 hours to obtain the average particle size 78nm polymer emulsion.

[0044] (2) The nanopolymer emulsion was degassed for 5 hours to obtain a nanopolymer antibacterial emulsion with a solid content of 58%.

[0045] Take by weighing 0.1g of this nanometer polymer antibacterial emulsion, add in the Erlenmeyer flask that 50mL ...

Embodiment 2

[0048] (1) Add 45 g of water and 3 g of methacryloyloxyethyl tetradecyl dimethyl bromide to a 150 mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer ammonium, then heated to 45°C and stirred at a speed of 450 r / min to dissolve, then added 10 g of methyl methacrylate and 10 g of acrylonitrile and stirred at a speed of 1100 r / min to emulsify and disperse. oxygen. After 60 min, heat up to 70°C, then add 5 mL of aqueous solution containing 0.3 g of azobisisobutylamidine hydrochloride, maintain 70°C and a stirring speed of 500 r / min under nitrogen protection, and react for 2.5 hours to obtain the average particle size A polymer emulsion with a diameter of 43 nm.

[0049] (2) Dilute the emulsion to a solid content of 10%, and then spray dry to obtain nano-polymer antibacterial agent powder.

[0050] Take by weighing 50mg of this particulate organic antiseptic powder, add in the Erlenmeyer flask that 50mL sterile wate...

Embodiment 3

[0053] (1) Add 45 g of water and 3 g of methacryloyloxyethyl hexadecyl dimethyl bromide to a 150 mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer Ammonium was then heated to 60°C and stirred at a speed of 600 r / min to dissolve, then 12 g of styrene was added and stirred at a speed of 1200 r / min to emulsify and disperse, while nitrogen bubbling was used to remove oxygen. After 60 min, the temperature was raised to 75°C, then 5 mL of an aqueous solution containing 0.2 g of ammonium persulfate was added, and the mixture was maintained at 75°C and a stirring speed of 650 r / min under nitrogen protection, and reacted for 2 hours to obtain a polymer emulsion with an average particle size of 65 nm.

[0054] (2) Dilute the emulsion to a solid content of 5%, and then freeze-dry to obtain nano-polymer antibacterial agent powder.

[0055] Take by weighing 45mg of this particulate state organic antiseptic powder, add in the...

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PUM

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Abstract

The invention discloses a nano-polymer antibacterial agent and a preparation method thereof. A nano polymer product with an antibacterial function is directly obtained by using an organic nano technology of emulsion polymerization via a one-step process. The obtained product has large specific surface area and high utilization rate, the particle size of the obtained product is within the range of 40-90nm; meanwhile, the antibacterial agent contains positive charges at the surface; harmful microbe can be firmly captured; the physiological process is interfered; a long fatty chain at the surface of the antibacterial agent punctures and destroys a cell wall, thereby resulting in death. Thus, the broad-spectrum efficient antibacterial effect is achieved, and the nano-polymer antibacterial agent has the characteristic of contact sterilization. In addition, the product disclosed by the invention is stable in structure, not easy to migrate, easy to disperse, good in compatibility with a polymer material, wide in application range and low in cost.

Description

technical field [0001] The invention belongs to the field of fine functional polymers, and in particular relates to a nanometer polymer antibacterial agent and a preparation method thereof. The antibacterial agent has efficient inhibitory or killing effects on various microorganisms. Background technique [0002] Because some harmful microorganisms in nature are very harmful to people, animals and plants, affecting their health and even life-threatening. These harmful microorganisms can also cause decomposition, deterioration and spoilage of materials, resulting in significant economic losses. Therefore, materials with antibacterial and bactericidal functions have attracted more and more attention. The production of antibacterial materials has become a new industry. Antibacterial materials have been widely used in many fields such as children's toys, medical and health care, and household products. Antibacterial agents play a key role in antibacterial materials. Antibacteri...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/44C08F212/08C08F220/18C08F220/34C08F2/28A01N37/12A01P1/00C09D5/14C08L101/00C08L33/12C08L33/20C08L25/14
Inventor 王正辉温青杨乐敏肖先森
Owner SOUTH CHINA AGRI UNIV
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