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Antibacterial polycarbonate plastic

A polycarbonate plastic, plastic technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of long-term antibacterial, easy precipitation, high price, etc., to achieve safety and low toxicity Stability, large comparison area, low price effect

Inactive Publication Date: 2020-10-02
智科通用技术研究(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the patent number ZL200810220350.3 discloses "Antibacterial Polymer Material and Its Preparation Method", which is prepared by inserting different types of quaternary phosphonium salts into clay to form a composite antibacterial agent, which is then added to plastics, rubber, synthetic fibers, Antibacterial polymer materials have been prepared in polymers such as coatings, adhesives, and pulp. Although good antibacterial effects can be obtained, there is a problem that quaternary phosphonium salts cannot be long-term antibacterial due to their fast dissolution.
The Chinese patent with the patent number ZL200910039119.9 discloses "copper-rare earth composite antibacterial agent and its preparation method and application". The antibacterial agent contains three antibacterial active centers of copper ions, rare earth ions and negative ions that can produce synergistic effects, showing the characteristics of broad antibacterial spectrum and high antibacterial efficiency, but the active components of the loaded copper ions and rare earth ions are easy to precipitate and affect its long-term effect
The Chinese patent No. 202010111658 discloses "polyphosphazene composite antibacterial agent loaded with nano silver and its preparation method and application", and provides a polyphosphazene composite antibacterial agent loaded with nano silver. The appearance of the material is brownish yellow or Light yellow powder, has the advantages of low toxicity, good antibacterial activity, and excellent stability. The technical problem of this technology is that when the antibacterial agent is added to plastics, the mechanical properties will decline significantly, and because it is silver-loaded antibacterial agent, which has the problems of easy discoloration and high price
In addition, the above-mentioned antibacterial agents have technical problems that are difficult to disperse in organic materials

Method used

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  • Antibacterial polycarbonate plastic
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Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of embodiment 1 plastic antibacterial agent

[0031] Include the following steps:

[0032] S1. Dissolve 50g of polystyrene-butadiene copolymer and 30g of chloromethylstyrene in 200g of dichloromethane, add 1g of chloromethylmethyl ether and 5g of triethylamine, stir well, and the stirring speed is 1000r / min , blow nitrogen, add 0.1g of anhydrous zinc chloride, heat to 70°C, and ultrasonically stir for 8 hours to form solid microspheres;

[0033] S2. Add the solid microspheres obtained in step S1 into 100g ethanol-water mixed solution (water content is 55wt%), add 5gNaCl and 5g glycerol, fully stir under 1000r / min stirring speed, react for 2h, make it fully Pores, the obtained beads are sequentially washed with absolute ethanol and water, centrifuged and vacuum-dried to obtain porous beads;

[0034]S3. Configure the porous beads obtained in step S2 into a 0.5mg / mL aqueous suspension, then add 20g of 5wt% zinc chloride aqueous solution, and sonica...

Embodiment 2

[0035] The preparation method of embodiment 2 plastic antibacterial agent

[0036] Include the following steps:

[0037] S1. Dissolve 100g polystyrene butadiene copolymer and 50g chloromethylstyrene in 200g chloroform-acetonitrile mixed solvent (chloroform, acetonitrile volume ratio is 3:1), add 5g chloromethylform Ether and 10g of triethylamine, stir well and evenly, the stirring speed is 1500r / min, pass nitrogen gas, add 1g of ferric chloride, heat to 100°C, and ultrasonically stir for 10h to form solid microspheres;

[0038] S2. Add the solid microspheres obtained in step S1 into 100g tetrahydrofuran-water mixed solution (water content is 60wt%), add 10gNaCl and 15g glycerol, fully stir under 1500r / min stirring speed, react for 4h, make it fully Pores, the obtained beads are sequentially washed with absolute ethanol and water, centrifuged and vacuum-dried to obtain porous beads;

[0039] S3. Configure the porous beads obtained in step S2 into a 1mg / mL aqueous suspension, ...

Embodiment 3

[0040] The preparation method of embodiment 3 plastic antibacterial agent

[0041] Include the following steps:

[0042] S1. Dissolve 70g of polystyrene-butadiene copolymer and 40g of chloromethylstyrene in 200g of chloroform, add 3g of chloromethyl methyl ether and 7g of triethylamine, stir well, and the stirring speed is 1250r / min , nitrogen gas was introduced, 0.5 g of tin tetrachloride was added, heated to 85 ° C, and ultrasonically stirred for 9 h to obtain 108 g of solid microspheres;

[0043] S2. Add all the solid microspheres obtained in step S1 into 100g of acetone-water mixed solution (the water content of acetone is 45wt%, the water content is 55wt%), add 7gNaCl and 10g glycerol, stir at 1250r / min, react for 3h, Make it fully pore-forming, and obtain the beads, the beads are successively washed with absolute ethanol and water, centrifuged and vacuum-dried to obtain 102g of porous beads;

[0044] S3. Configure all the porous beads obtained in step S2 into a 0.75mg / ...

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Abstract

The invention provides an antibacterial polycarbonate plastic. The antibacterial polycarbonate plastic contains 0.2-5wt% of a plastic antibacterial agent, and the plastic antibacterial agent takes porous beads formed by pore-forming of beads formed after cross-linking reaction of a polystyrene-butadiene copolymer and chloromethyl styrene as a carrier, and takes loaded nano zinc oxide and nano titanium dioxide as active components. The polycarbonate plastic prepared by the invention has a long-acting antibacterial function.

Description

technical field [0001] The invention relates to an antibacterial polycarbonate plastic. Background technique [0002] Polycarbonate, referred to as PC in English, is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Due to the special structure of polycarbonate, it has become the fastest-growing general-purpose engineering plastic among the five major engineering plastics. [0003] The abuse of soluble disinfectants has seriously damaged the microbial balance of the human living environment, resulting in harmful microbial variants that pose a great threat to people's health, such as superbugs, so how to effectively control harmful microbial infections will become an issue in the current ecological environment. and an important research topic in the field of antibacterial. The Chinese patent with the patent number ZL200810...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L25/10C08K9/12C08K3/22C08J7/04C09D5/14C08J9/00
CPCC08J7/04C08J9/00C08J2325/10C08J2369/00C08J2425/10C08K2003/2241C08K2003/2296C08K2201/011C08L69/00C09D5/14C08L25/10C08K9/12C08K3/22
Inventor 不公告发明人
Owner 智科通用技术研究(广州)有限公司
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