A kind of nano polymer antibacterial agent and preparation method thereof

A nanopolymer and antibacterial agent technology, applied in the field of nanopolymer antibacterial agent and its preparation, can solve the problems of difficult to obtain products in large quantities, high equipment requirements, large particle size, etc., and achieve narrow particle size distribution range and huge ratio Surface, easily dispersed effect

Inactive Publication Date: 2016-01-13
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 45g of water and 3g of methacryloyloxyethyl dodecyl dimethyl ammonium bromide to a 150mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer. Immediately raise the temperature to 40°C and stir to dissolve at a speed of 400r / min, then add 30g of methyl methacrylate and stir at a speed of 1000r / min to emulsify and disperse, while nitrogen bubbling is used to remove oxygen. After 45 minutes, heat up to 60°C, then add 5mL of an aqueous solution containing 0.3g of azobisisobutylamidine hydrochloride, maintain 65°C and a stirring speed of 450r / min under the protection of nitrogen, and react for 3 hours to obtain an average particle size of 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 t...

Embodiment 2

[0047] (1) Add 45g of water and 3g of methacryloyloxyethyltetradecyldimethylammonium bromide to a 150mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet pipe, and a thermometer. Immediately raise the temperature to 45°C and stir to dissolve at a speed of 450r / min, then add 10g of methyl methacrylate and 10g of acrylonitrile and stir at a speed of 1100r / min to emulsify and disperse, while nitrogen bubbling is used to remove oxygen. After 60 minutes, heat up to 70°C, then add 5mL of an aqueous solution containing 0.3g of azobisisobutylamidine hydrochloride, maintain 70°C and a stirring speed of 500r / min under nitrogen protection, and react for 2.5h to obtain an average particle size of 43nm polymer emulsion.

[0048] (2) Dilute the emulsion to a solid content of 10%, and then spray dry to obtain nano-polymer antibacterial agent powder.

[0049] Take by weighing 50mg of this particulate state organic antibacterial agent powder, add in the ...

Embodiment 3

[0051] (1) Add 45g of water and 3g of methacryloyloxyethylhexadecyldimethylammonium bromide to a 150mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet pipe, and a thermometer. Immediately raise the temperature to 60°C and stir to dissolve at a speed of 600r / min, then add 12g of styrene and stir to emulsify and disperse at a speed of 1200r / min, while nitrogen bubbling method is used to remove oxygen. After 60 minutes, the temperature was raised to 75°C, and then 5 mL of an aqueous solution containing 0.2 g of ammonium persulfate was added, 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.

[0052] (2) Dilute the emulsion to a solid content of 5%, and then freeze-dry to obtain nano-polymer antibacterial agent powder.

[0053] Take by weighing 45mg of this particulate state organic antibacterial agent powder, add in th...

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Abstract

The invention discloses a nanometer polymer antibacterial agent and a preparation method thereof. The invention utilizes the organic nanotechnology of emulsion polymerization to directly obtain the nanometer macromolecule product with antibacterial function through a one-step process. The particle size of the obtained product is in the range of 40-90nm, with large specific surface area and high utilization rate. At the same time, the surface of the antibacterial agent is positively charged, which can firmly capture and absorb harmful microorganisms and interfere with their physiological processes; The puncture damage will cause its death, realize the broad-spectrum and high-efficiency antibacterial effect, and have the characteristics of contact sterilization. In addition, the product of the invention has a stable structure, is not easy to migrate, is easy to disperse, has good compatibility with polymer materials, has a wide range of applications, and is low in cost.

Description

Technical field [0001] The present invention is a fine -functional high -molecular field, which involves a nanoconal polymer antibacterial agent and its preparation method. The antibacterial agent has an efficient inhibitory or killing effect on a variety of microorganisms. Background technique [0002] Because some harmful microorganisms in nature have great harm to humans, animals, and plants, affect their health, and even life -threatening.These harmful microorganisms can also cause the decomposition, deterioration and corruption of materials, which will bring major economic losses.Therefore, materials with antibacterial and sterilization functions have attracted more and more attention. The production of antibacterial materials has become an emerging industry. Antibacterial materials have been widely used in many fields such as children's toys, medical care, and home supplies.The key role in antibacterial materials is antibacterial agents. The antibacterial agent has the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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