Antibacterial compatilizer as well as preparation method and application thereof

Abstract

The invention provides an antibacterial compatilizer as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The antibacterial compatilizer is prepared from a polyolefin elastomer, an antibacterial agent, a first grafting monomer and an initiator through a cross-linking reaction; the antibacterial agent and the first grafting monomer are respectively grafted on a long chain of the polyolefin elastomer; the antibacterial agent is prepared by carrying out esterification reaction on a second grafting monomer and hydroxyl on the surface of the nano metal oxide coated polyphosphazene microsphere; the first grafting monomer is maleic anhydride or cis-1, 2, 3, 6-tetrahydrophthalic anhydride, and the second grafting monomer is maleic anhydride or cis-1, 2, 3, 6-tetrahydrophthalic anhydride. According to the invention, the nano metal oxide coated polyphosphazene microspheres are grafted with the grafting monomer, and then the grafted nano metal oxide coated polyphosphazene microspheres, the POE and the grafting monomer are subjected to a cross-linking reaction, so that the compatilizer and the antibacterial agent form an integral structure, the problem of poor compatibility of the antibacterial agent and a nylon material is solved, and the problem of short antibacterial time of the nylon material is solved; therefore, the nylon material has antibacterial performance in the whole service period.

Claims

1. An antimicrobial compatibilizer, characterized in that: The invention is prepared by cross-linking reaction of a polyolefin elastomer, a first antimicrobial agent, a first graft monomer and an initiator; The first antimicrobial agent and the first grafting monomer are respectively grafted onto the long chain of the polyolefin elastomer; The first grafting monomer is cis-1,2,3,6-tetrahydrophthalic anhydride; The second grafting monomer is maleic anhydride or cis-1,2,3,6-tetrahydrophthalic anhydride.

2. The antimicrobial compatibilizer according to claim 1, characterized in that The amount of the first grafting monomer added is 2.5-5wt% of the polyolefin elastomer; And / or, the initiator is at least one selected from dicumyl peroxide, di-tert-butyl peroxide, benzoyl peroxide, tert-butyl perbenzoate, and diisopropyl peroxydicarbonate; and / or, the amount of the first antimicrobial agent added is 2.5-5wt% of the polyolefin elastomer; The first antibacterial agent is grafted modified nano metal oxide@polyphosphazene microspheres.

3. The antimicrobial compatibilizer according to claim 2, characterized in that The first antibacterial agent is prepared by an esterification reaction between the second grafting monomer and the hydroxyl groups on the surface of nano-metal oxide@polyphosphazene microspheres.

4. The antimicrobial compatibilizer according to any one of claims 1 to 3, characterized in that The preparation method of the first antibacterial agent specifically comprises: S1. Hexachlorocyclotriphosphazene, resveratrol and a second antibacterial agent are added to an organic solvent and uniformly dispersed by ultrasonic cleaning to obtain a mixed solution; S2. An acid binding agent was slowly added to the mixed solution, and a polyphosphazene microsphere solution was obtained under elevated temperature and ultrasonic conditions; S3. Add the second grafting monomer and the catalyst to the polyphosphazene microsphere solution and heat to carry out a catalytic reaction to obtain a reaction product. After washing and drying, the final purified product is obtained, namely, polyphosphazene microspheres grafted with the second grafting monomer having a core-shell structure, which is the first antibacterial agent.

5. The antimicrobial compatibilizer according to claim 4, characterized in that In S1, the mass ratio of hexachlorocyclotriphosphazene, resveratrol and the second antibacterial agent is 1:(1-3):(1-3); The organic solvent is selected from the group consisting of one or more of tetrahydrofuran, methanol, acetonitrile, ethanol, acetone, N,N-dimethylformamide and N,N-dimethylacetamide; The second antibacterial agent is nano metal oxide; And / or, the nano metal oxide is any one or more of nano MgO, nano CuO, nano ZnO, and nano TiO2; And / or, in S2, the acidifying agent is selected from one or more of triethylamine, pyridine, N,N-diisopropylethylamine, 4-dimethylaminopyridine, triethanolamine, tetrabutylammonium bromide, potassium carbonate, ammonium carbonate and sodium carbonate. and / or, in S3, the second grafting monomer is maleic anhydride or cis-1,2,3,6-tetrahydrophthalic anhydride; The catalyst is phthalic acid.

6. A method for preparing the antimicrobial compatibilizer according to any one of claims 1 to 5, characterized in that: The polyolefin elastomer, the first antimicrobial agent, the first grafting monomer, and the initiator are added to a high-speed mixer and mixed evenly; then the materials are fed to a twin-screw extruder, reaction conditions are set for reaction and extrusion; the extrudate is cooled and pelletized to obtain a POE grafted antimicrobial agent product, which is an antimicrobial compatibilizer.

7. The method for preparing the antimicrobial compatibilizer according to claim 6, wherein: The raw material components are as follows, in parts by mass: 100 parts of polyolefin elastomer, 2.5 to 5 parts of the first antibacterial agent, 2.5 to 5 parts of the first grafting monomer, and 0.5 to 1 part of the initiator; The reaction conditions include a reaction temperature of 200-220°C; a screw speed of 200-300 rpm; The feeding speed is 10-20 rpm.

8. Use of the antibacterial compatibilizer according to any one of claims 1 to 5 in the preparation of antibacterial nylon materials.

9. An antibacterial nylon material, characterized in that: The composition comprises at least the antimicrobial compatibilizer according to any one of claims 1 to 4, nylon and a toughening agent; the toughening agent is glass fiber.

10. The antibacterial nylon material according to claim 9, characterized in that: The antibacterial nylon material comprises, by weight, 50 to 70 parts of nylon, 25 to 40 parts of toughening agent, 3 to 9 parts of antibacterial compatibilizer, and 0.2 to 0.4 parts of antioxidant. The nylon is nylon 6 or nylon 66; the antioxidant is antioxidant 1098.

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