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 involve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] (1) 45 g of water and 3 g of methacryloyloxyethyl dodecyl dimethyl bromide were added to a 150 mL four-neck reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet pipe, and a thermometer. ammonium, then heated up to 40 °C and dissolved with stirring at a speed of 400 r / min, then added 30 g of methyl methacrylate and stirred at a speed of 1000 r / min for emulsification and dispersion, while deoxygenating by nitrogen bubbling. After 45 min, the temperature was raised to 60 °C, then 5 mL of an aqueous solution containing 0.3 g of azodiisobutylamidine hydrochloride was added, and the stirring speed was maintained at 65 °C and 450 r / min under nitrogen protection, and the average particle size was obtained after the reaction for 3 h. 78nm polymer emulsion.

[0044] (2) Degassing the above nano-polymer emulsion for 5 h, a nano-polymer antibacterial emulsion with a solid content of 58% is obtained.

[0045] Weigh 0.1 g of the nano-poly...

Example Embodiment

[0047] Example 2

[0048] (1) Add 45 g of water and 3 g of methacryloyloxyethyltetradecyldimethyl bromide to a 150mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer, respectively. 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 emulsified and dispersed at a speed of 1100 r / min. oxygen. After 60 min, the temperature was raised to 70 °C, then 5 mL of an aqueous solution containing 0.3 g of azodiisobutylamidine hydrochloride was added, and the stirring speed was maintained at 70 °C and 500 r / min under nitrogen protection, and the reaction was performed for 2.5 h to obtain an average particle size. A polymer emulsion with a diameter of 43 nm.

[0049] (2) The emulsion is diluted to a solid content of 10%, and then spray-dried to obtain nano-polymer antibacterial powder.

[0050] Weigh 50 mg of the particulate org...

Example Embodiment

[0052] Example 3

[0053] (1) Add 45 g of water and 3 g of methacryloyloxyethylhexadecyldimethyl bromide to a 150mL four-necked reaction flask equipped with a reflux condenser, a stirrer, a nitrogen inlet tube, and a thermometer, respectively. Ammonium was then heated to 60 °C and dissolved with stirring at a speed of 600 r / min. Then, 12 g of styrene was added and emulsified and dispersed at a speed of 1200 r / min. At the same time, nitrogen bubbling was used to remove oxygen. After 60 min, the temperature was raised to 75 °C, and then 5 mL of an aqueous solution containing 0.2 g of ammonium persulfate was added. Under nitrogen protection, the stirring speed was maintained at 75 °C and 650 r / min. After the reaction for 2 h, a polymer emulsion with an average particle size of 65 nm was obtained.

[0054] (2) The emulsion is diluted to a solid content of 5%, and then freeze-dried to obtain nano-polymer antibacterial powder.

[0055] Weigh 45 mg of the particulate organic antib...

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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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