Antibacterial automobile foot mat and preparation method thereof

Abstract

The invention relates to the technical field of automobile foot mats, and particularly discloses an antibacterial automobile foot mat and a preparation method thereof.The antibacterial automobile foot mat is prepared from, by weight, 82-86 parts of polyvinyl chloride, 13-15 parts of chlorinated polyethylene, 9-12 parts of an active antibacterial component, 36-44 parts of a functional component, 3.9-4.5 parts of a heat stabilizer, 1.6-4.0 parts of a lubricant, 2.2-2.8 parts of an antioxidant and 3-4 parts of an ultraviolet light absorber; the active antibacterial component and the functional component are added, the active antibacterial component has a cardanol structure, a quaternary ammonium salt structure, pyridyl and amino, not only can be entangled with a polyvinyl chloride alkyl molecular chain to form a molecular interpenetrating network structure, but also has good antibacterial performance, and meanwhile, the active antibacterial component can generate hydrogen-bond interaction with the functional component, so that the antibacterial performance is improved. The antibacterial property, the ultraviolet aging resistance and the mechanical property of the automobile foot mat are improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile floor mats, and more specifically, to an antibacterial automobile floor mat and a preparation method thereof. Background Art

[0002] Car floor mats are an environmentally friendly car interior component that integrates five major functions: water absorption, dust absorption, dirt removal, sound insulation, and protection of the main body carpet. They are also a kind of decoration inside the car, which can play a role in aesthetics and comfort. Among them, PVC material is often used as the main base material of car floor mats because of its low price, easy cleaning, and good waterproof and wear resistance.

[0003] However, PVC materials contain polar chlorine atoms, and the monomer molecules are connected in various ways, which makes PVC materials brittle and poor in plasticizing properties. In order to improve the mechanical properties of PVC materials, existing studies often use carbon black, calcium carbonate, aluminum oxide and other materials as reinforcement systems to enhance and modify them. Although reinforcing materials such as carbon black can improve the density and mechanical properties of the rubber matrix to a certain extent through uniform dispersion and support, reinforcing materials cannot participate in the synthesis reaction of PVC materials, and are easy to migrate and precipitate, resulting in a decrease in the mechanical properties of car mats. In addition, existing PVC materials themselves do not have antibacterial properties, and their UV aging resistance is average.

[0004] Therefore, providing a car floor mat with good mechanical properties, good antibacterial properties and excellent resistance to ultraviolet aging is a technical problem that needs to be solved at present. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present application provides an antibacterial car floor mat and a preparation method thereof.

[0006] An antibacterial car mat comprises the following raw materials in parts by weight: 82-86 parts of polyvinyl chloride, 13-15 parts of chlorinated polyethylene, 9-12 parts of active antibacterial components, 36-44 parts of functional components, 3.9-4.5 parts of heat stabilizer, 1.6-4.0 parts of lubricant, 2.2-2.8 parts of antioxidant and 3-4 parts of ultraviolet absorber;

[0007] The preparation method of the antibacterial car mat comprises the following steps:

[0008] Add polyvinyl chloride into a high-speed mixer, add a heat stabilizer, a functional component, chlorinated polyethylene, a lubricant and an antioxidant, stir at 76-84° C. for 14-18 minutes, add an active antibacterial component and an ultraviolet absorber, raise the temperature to 158-166° C., stir for 9-13 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168-172° C. for 16-22 minutes, unload, crush and place in an injection molding machine for injection molding to obtain an antibacterial car mat.

[0009] Preferably, the process parameters for the twin-screw extrusion mixing are: zone 1 is 135-145°C, zone 2 is 155-165°C, zone 3 is 165-175°C, die head is 160-170°C, dwell time is 3-6 min, and pressure is 12-18 MPa.

[0010] Preferably, during the injection molding, the head temperature is 182-184° C., the injection pressure is 68-70 MPa, the extrusion rate is 1.2-1.4 g / s, the traction force is 6-6.2 N, and the moving speed is 0.3-0.35 m / min.

[0011] Preferably, the heat stabilizer is a calcium-zinc composite stabilizer.

[0012] Preferably, the lubricant is one or more of polyethylene wax, oxidized polyethylene wax and monoglyceride mixed in any proportion.

[0013] Preferably, the antioxidant is one or more of antioxidant 1076, antioxidant 168 and antioxidant 1010 mixed in any proportion.

[0014] Preferably, the ultraviolet absorber is one of ultraviolet absorber UV-531, ultraviolet absorber TBS and ultraviolet absorber UV-P.

[0015] Preferably, the active antibacterial component is prepared by the following steps:

[0016] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, raise the temperature to reflux while stirring, then add triethylamine and toluene, add epichlorohydrin dropwise, control the dripping within 10 minutes, complete the dripping, stir and react for 3-4 hours, after the reaction is completed, cool to room temperature, add alkali solution dropwise while stirring, control the dripping within 30 minutes, continue stirring for 0.5-1 hour, add alkali solution dropwise again, control the dripping within 20 minutes, continue stirring for 1.2-1.6 hours, filter under reduced pressure, wash, and dry to obtain a modified monomer, wherein cardanol, The mass ratio of anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 3-6:55-65:1-2:14-18:12-16:25-35, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 12-16%, and the mass of the alkali solution added twice is the same. In the above reaction process, anhydrous DMF is used as a solvent, triethylamine is used as a catalyst, and toluene is used as a dehydrating agent. The phenolic hydroxyl group on the cardanol reacts with epichlorohydrin, and then under the action of the base, the hydrogen chloride is removed by ring closing to obtain a modified monomer;

[0017] Step A2, adding the modified monomer to isopropanol, stirring evenly, raising the temperature to 68-74°C under nitrogen protection, dropping dimethyldiallyl ammonium chloride solution, stirring and reacting for 8-10 hours, adding ammonium persulfate and stirring and reacting for 1.6-2.4 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking with acetone for 1-2 hours, filtering, washing, and drying to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 2-4:62-74:16-22:20-24:26-30, the concentration of the dimethyldiallyl ammonium chloride solution is 0.6-0.8 g / mL, and the amount of ammonium persulfate is 1-2% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0018] Step A3, add the copolymer component to anhydrous DMF, stir evenly, heat to 45-55 ° C, adjust the pH to 9-10, and add a mixture of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30 minutes. After the dripping is completed, heat to 74-76 ° C, continue to stir and react for 5-7 hours, adjust the pH to neutral, rotary evaporate, wash and dry to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and the mixture a is 2.5-3.5 : 60-70: 22-26, in the mixed solution a, the mass ratio of 2,6-diaminopyridine and isopropanol is 20-22: 1.6-2.0, in the above reaction process, with anhydrous DMF as solvent, the epoxy group on the copolymer component and the amino group on 2,6-diaminopyridine undergo a ring-opening esterification reaction to obtain an active antibacterial component, and the amount of 2,6-diaminopyridine is controlled to be slightly higher than that of the copolymer component, so that after the reaction is completed, there are still remaining amino groups that can participate in the subsequent reaction process.

[0019] Preferably, the functional component is prepared by the following steps:

[0020] Step B1, drying the nano zinc oxide under vacuum conditions, then placing it in deionized water, heating it to 45-55°C, uniformly dispersing it by ultrasonication, adjusting the pH to 9-10, continuing to heat it to 85-90°C, dripping a sodium silicate solution, and controlling the dripping to be completed within 30 minutes. After the dripping is completed, adjusting the pH value to 8.4-8.6, aging for 2 hours, filtering, washing, and drying to obtain modified silicon dioxide, wherein the mass ratio of nano zinc oxide, deionized water, and sodium silicate solution is 4-6:62-68:8-16, and the concentration of the sodium silicate solution is 0.05-0.07M. After the above treatment, amorphous hydrated silicon oxide is firmly bonded to the surface of the nano zinc oxide in the form of hydroxyl groups to obtain modified silicon dioxide;

[0021] Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 are mixed uniformly, the temperature is raised to 64-76 ° C, the reaction is stirred at room temperature for 5.5-6.6 hours, centrifuged, the precipitate is washed and dried to obtain epoxy silica, the epoxy silica and anhydrous DMF are ultrasonically dispersed, tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF mixed solution b are added dropwise, and the dripping is controlled within 15 minutes. After the dripping is completed, the temperature is raised to 72-78 ° C and stirred for 3-4 hours. After the reaction is completed, the precipitate is washed and dried to obtain a functional component, wherein the modified silica, The dosage ratio of deionized water, anhydrous ethanol and KH-560 is 4:16-20:34-42:0.5-0.8, the mass ratio of epoxy silicon dioxide, anhydrous DMF and mixed liquid b is 3.6:42-56:16, and the mass ratio of tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF in the mixed liquid b is 0.1:1.6-2.2:14. The modified silicon dioxide is treated with KH-560 to obtain epoxy silicon dioxide, and then under the action of tetrabutylammonium bromide, the amino group of 6-aminocaproic acid and the epoxy group undergo a ring-opening reaction to obtain a functional component.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In order to improve the antibacterial properties, mechanical properties and UV aging resistance of the car mat, the present application starts from two aspects. First, an active antibacterial component is added. The surface of the active antibacterial component is chemically bonded with a cardanol structure, a quaternary ammonium salt structure, a pyridyl group and an amino group. The presence of the cardanol structure can not only entangle with the polyvinyl chloride alkyl molecular chain to form a mutually entangled molecular interpenetrating network structure, so that it has good compatibility with the polyvinyl chloride base material and enhances the mechanical properties of the car mat, but also the phenolic hydroxyl group and the unsaturated long alkane chain in the cardanol structure also give it antibacterial properties. The quaternary ammonium salt structure and the pyridyl group both have good antibacterial properties. At the same time, the pyridyl group and the amino group thereon can also produce hydrogen bonds with the hydroxyl group and the carboxyl group in the functional component, further improving the mechanical properties of the car mat. The first is the chemical properties of the car mats. The second is the addition of functional components. The functional components are composed of a core-shell structure. The outer layer is a chemically bonded structure of epoxy silica and 6-aminocaproic acid, and the inner core is nano zinc oxide. The existence of the epoxy silica structure, on the one hand, plays its own good chemical stability and nano zinc oxide with good UV resistance and antibacterial properties to improve the UV aging resistance and antibacterial properties of the car mats. At the same time, it can also form hydrogen bonds and physical entanglement with polyvinyl chloride chains, further improving the mechanical properties of the car mats. On the other hand, the 6-aminocaproic acid grafted on the surface of epoxy silica has a flexible chain structure and good flexibility. Introducing it into the functional component can synergize with the active antibacterial component to jointly improve the antibacterial properties, mechanical properties and UV aging resistance of the car mats. DETAILED DESCRIPTION

[0024] In order to make the implementation methods of the present application easier to understand, the present application will be described in detail below in conjunction with specific examples. These examples are only for illustration and are not limited to the scope of application of the present application.

[0025] The contents of the main raw materials and their components used in the examples and comparative examples are as follows:

[0026] The polyvinyl chloride is the standard polyvinyl chloride material of brand P-440 sold by Ningbo Maokai Plastic Chemical Co., Ltd.; the chlorinated polyethylene is the injection molding grade chlorinated polyethylene of brand Dow 7100 sold by Dongguan Yingxiang Plastic Raw Materials Co., Ltd.; the calcium-zinc composite stabilizer is the calcium-zinc composite stabilizer for plastics sold by Wuhan Xindongyi Chemical Co., Ltd.

[0027] The present application is further described in detail below in conjunction with embodiments and comparative examples.

[0028] Preparation Examples 1-3 and Comparative Preparation Examples 1-3 provide methods for preparing active antibacterial components.

[0029] Preparation Example 1

[0030] This preparation example provides an active antibacterial component, which is prepared by the following steps:

[0031] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, control the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, the ultrasonic treatment to 22min, control the speed to 600rpm, raise the temperature to reflux while stirring, then add triethylamine and toluene, drop epichlorohydrin, control the dripping to be completed within 10min, maintain the speed unchanged, stir and react for 3h, after the reaction is completed, cool to room temperature, drop alkali solution while stirring, control the dripping to be completed within 30min, continue stirring for 0.5h, drop alkali solution again, control the dripping to be completed within 20min, continue stirring for 1.2h, filter under reduced pressure, wash with anhydrous ethanol and deionized water 3 times in sequence, and dry at 60°C to constant weight to obtain a modified monomer, wherein the mass ratio of cardanol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 3:55:1:14:12:25, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 12%, and the mass of the alkali solution added twice is the same;

[0032] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 500 rpm for 20 minutes until uniform, heating to 68°C under nitrogen protection, adding dimethyldiallyl ammonium chloride solution dropwise, stirring and reacting for 8 hours, adding ammonium persulfate and stirring and reacting for 1.6 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking in acetone for 1 hour, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 55°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 2:62:16:20:26, the concentration of the dimethyldiallyl ammonium chloride solution is 0.6 g / mL, and the amount of ammonium persulfate is 1% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0033] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 550rpm for 21min until uniform, heat to 45°C, adjust the pH to 9 with 0.6M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30min. After the dripping is completed, heat to 74°C, continue to stir and react for 5h, then adjust the pH to neutral with 0.4M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 82°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water three times in sequence, and dry at 64°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 2.5:60:22, and the mass ratio of 2,6-diaminopyridine and isopropanol in the mixed solution a is 20:1.6.

[0034] Preparation Example 2

[0035] This preparation example provides an active antibacterial component, which is prepared by the following steps:

[0036] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, control the ultrasonic frequency to 40kHz, the ultrasonic power to 600w, the ultrasonic for 26min, control the speed to 650rpm, heat to reflux while stirring, then add triethylamine and toluene, add epichlorohydrin dropwise, control the dripping within 10min, after the dripping, maintain the speed unchanged, stir and react for 3.5h, after the reaction is completed, cool to room temperature, add alkali solution dropwise while stirring, control the dripping within 30min, and continue stirring 0.75h, add alkali solution again, control the dripping within 20min, continue stirring for 1.4h, filter under reduced pressure, wash with anhydrous ethanol and deionized water for 4 times in sequence, and dry at 65°C to constant weight to obtain a modified monomer, wherein the mass ratio of cardanol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 4.5:60:1.5:16:14:30, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 14%, and the mass of the alkali solution added twice is the same;

[0037] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 600 rpm for 22 minutes until uniform, heating to 71°C under nitrogen protection, adding dimethyldiallyl ammonium chloride solution dropwise, stirring and reacting for 9 hours, adding ammonium persulfate and stirring and reacting for 2.0 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking in acetone for 1.5 hours, filtering, washing with anhydrous ethanol and deionized water for 4 times in sequence, and drying at 60°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 3:68:19:22:28, the concentration of the dimethyldiallyl ammonium chloride solution is 0.7 g / mL, and the amount of ammonium persulfate is 1.5% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0038] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 600 rpm for 24 minutes until uniform, heat to 50°C, adjust the pH to 9.5 with 0.8M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30 minutes. After the dripping is completed, heat to 75°C, continue to stir and react for 6 hours, adjust the pH to neutral with 0.6M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 84°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water 4 times in sequence, and dry at 67°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 3.0:65:24, and the mass ratio of 2,6-diaminopyridine and isopropanol in the mixed solution a is 21:1.8.

[0039] Preparation Example 3

[0040] This preparation example provides an active antibacterial component, which is prepared by the following steps:

[0041] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, control the ultrasonic frequency to 45kHz, the ultrasonic power to 650w, the ultrasonic for 30min, control the speed to 700rpm, stir while heating to reflux, then add triethylamine and toluene, drop epichlorohydrin, control the dripping within 10min, after the dripping, maintain the speed unchanged, stir and react for 4h, after the reaction, cool to room temperature, stir while adding alkali solution, control the dripping within 30min, continue stirring for 1h, drop alkali solution again, control the dripping within 20min, continue stirring for 1.6h, filter under reduced pressure, wash with anhydrous ethanol and deionized water 5 times in sequence, and dry at 70°C to constant weight to obtain a modified monomer, wherein the mass ratio of cardanol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 6:65:2:18:16:35, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 16%, and the mass of the alkali solution added twice is the same;

[0042] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 700 rpm for 24 minutes until uniform, heating to 74°C under nitrogen protection, adding dimethyldiallyl ammonium chloride solution dropwise, stirring and reacting for 10 hours, adding ammonium persulfate and stirring and reacting for 2.4 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking in acetone for 2 hours, filtering, washing with anhydrous ethanol and deionized water for 5 times in sequence, and drying at 65°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 4:74:22:24:30, the concentration of the dimethyldiallyl ammonium chloride solution is 0.8 g / mL, and the amount of ammonium persulfate is 2% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0043] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 650rpm for 27min until uniform, heat to 55°C, adjust the pH to 10 with 1M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30min. After the dripping is completed, heat to 76°C, continue to stir and react for 7h, adjust the pH to neutral with 0.8M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 86°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water 5 times in sequence, and dry at 72°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 3.5:70:26, and the mass ratio of 2,6-diaminopyridine and isopropanol in the mixed solution a is 22:2.0.

[0044] Comparative Preparation Example 1

[0045] This comparative preparation example provides an active antibacterial component, which is prepared by the following steps:

[0046] Step A1, ultrasonically disperse 2-allylphenol in anhydrous ethanol, control the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, the ultrasonication for 22min, control the speed to 600rpm, raise the temperature to reflux while stirring, then add triethylamine and toluene, add epichlorohydrin dropwise, control the dripping within 10min, after the dripping, maintain the speed unchanged, stir and react for 3h, after the reaction is completed, cool to room temperature, add alkali solution dropwise while stirring, control the dripping within 30min, continue stirring Stir for 0.5h, add alkali solution again, control the dripping to be completed within 20min, continue stirring for 1.2h, filter under reduced pressure, wash with anhydrous ethanol and deionized water three times in sequence, and dry at 60°C to constant weight to obtain a modified monomer, wherein the mass ratio of 2-allylphenol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 3:55:1:14:12:25, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 12%, and the mass of the alkali solution added twice is the same;

[0047] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 500 rpm for 20 minutes until uniform, heating to 68°C under nitrogen protection, adding dimethyldiallyl ammonium chloride solution dropwise, stirring and reacting for 8 hours, adding ammonium persulfate and stirring and reacting for 1.6 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking in acetone for 1 hour, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 55°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 2:62:16:20:26, the concentration of the dimethyldiallyl ammonium chloride solution is 0.6 g / mL, and the amount of ammonium persulfate is 1% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0048] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 550rpm for 21min until uniform, heat to 45°C, adjust the pH to 9 with 0.6M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30min. After the dripping is completed, heat to 74°C, continue to stir and react for 5h, then adjust the pH to neutral with 0.4M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 82°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water three times in sequence, and dry at 64°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 2.5:60:22, and the mass ratio of 2,6-diaminopyridine and isopropanol in the mixed solution a is 20:1.6.

[0049] Comparative Preparation Example 2

[0050] This comparative preparation example provides an active antibacterial component, which is prepared by the following steps:

[0051] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, control the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, the ultrasonic treatment to 22min, control the speed to 600rpm, raise the temperature to reflux while stirring, then add triethylamine and toluene, drop epichlorohydrin, control the dripping to be completed within 10min, maintain the speed unchanged, stir and react for 3h, after the reaction is completed, cool to room temperature, drop alkali solution while stirring, control the dripping to be completed within 30min, continue stirring for 0.5h, drop alkali solution again, control the dripping to be completed within 20min, continue stirring for 1.2h, filter under reduced pressure, wash with anhydrous ethanol and deionized water 3 times in sequence, and dry at 60°C to constant weight to obtain a modified monomer, wherein the mass ratio of cardanol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 3:55:1:14:12:25, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 12%, and the mass of the alkali solution added twice is the same;

[0052] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 500 rpm for 20 minutes until uniform, heating to 68°C under nitrogen protection, dropping dimethyldiallyl ammonium chloride solution, stirring and reacting for 8 hours, adding ammonium persulfate and stirring and reacting for 1.6 hours, after the reaction, adding anhydrous ethanol, precipitating, filtering, and then soaking in acetone for 1 hour, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 55°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, diallylamine solution, anhydrous ethanol and acetone is 2:62:16:20:26, the concentration of the diallylamine solution is 0.6 g / mL, and the amount of ammonium persulfate is 1% of the total mass of the modified monomer and diallylamine;

[0053] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 550rpm for 21min until uniform, heat to 45°C, adjust the pH to 9 with 0.6M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30min. After the dripping is completed, heat to 74°C, continue to stir and react for 5h, then adjust the pH to neutral with 0.4M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 82°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water three times in sequence, and dry at 64°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 2.5:60:22, and the mass ratio of 2,6-diaminopyridine and isopropanol in the mixed solution a is 20:1.6.

[0054] Comparative Preparation Example 3

[0055] This comparative preparation example provides an active antibacterial component, which is prepared by the following steps:

[0056] Step A1, ultrasonically disperse cardanol in anhydrous ethanol, control the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, the ultrasonic treatment to 22min, control the speed to 600rpm, raise the temperature to reflux while stirring, then add triethylamine and toluene, drop epichlorohydrin, control the dripping to be completed within 10min, maintain the speed unchanged, stir and react for 3h, after the reaction is completed, cool to room temperature, drop alkali solution while stirring, control the dripping to be completed within 30min, continue stirring for 0.5h, drop alkali solution again, control the dripping to be completed within 20min, continue stirring for 1.2h, filter under reduced pressure, wash with anhydrous ethanol and deionized water 3 times in sequence, and dry at 60°C to constant weight to obtain a modified monomer, wherein the mass ratio of cardanol, anhydrous ethanol, triethylamine, toluene, epichlorohydrin and the total amount of alkali solution is 3:55:1:14:12:25, the alkali solution is a sodium hydroxide aqueous solution with a mass fraction of 12%, and the mass of the alkali solution added twice is the same;

[0057] Step A2, adding the modified monomer to isopropanol, stirring at a speed of 500 rpm for 20 minutes until uniform, heating to 68°C under nitrogen protection, adding dimethyldiallyl ammonium chloride solution dropwise, stirring and reacting for 8 hours, adding ammonium persulfate and stirring and reacting for 1.6 hours, adding anhydrous ethanol after the reaction, precipitating, filtering, and then soaking in acetone for 1 hour, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 55°C to constant weight to obtain a copolymer component, wherein the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 2:62:16:20:26, the concentration of the dimethyldiallyl ammonium chloride solution is 0.6 g / mL, and the amount of ammonium persulfate is 1% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride;

[0058] Step A3, add the copolymer component to anhydrous DMF, stir at a speed of 550rpm for 21min until uniform, heat to 45°C, adjust the pH to 9 with 0.6M sodium hydroxide aqueous solution, add a mixed solution a of 2,6-diaminotoluene and isopropanol dropwise while stirring, and control the dripping to be completed within 30min. After the dripping is completed, heat to 74°C, continue to stir and react for 5h, then adjust the pH to neutral with 0.4M hydrochloric acid aqueous solution, control the rotary evaporation temperature to 82°C, rotary evaporation to remove anhydrous DMF, wash with anhydrous ethanol and deionized water three times in sequence, and dry at 64°C to constant weight to obtain an active antibacterial component, wherein the mass ratio of the copolymer component, anhydrous DMF and mixed solution a is 2.5:60:22, and the mass ratio of 2,6-diaminotoluene and isopropanol in the mixed solution a is 20:1.6.

[0059] Preparation Examples 4-6 and Comparative Preparation Example 4 provide a functional component.

[0060] Preparation Example 4

[0061] This preparation example provides a functional component, which is prepared by the following steps:

[0062] Step B1, placing the nano zinc oxide at 76 ° C for 18 hours in vacuum drying, then placing it in deionized water, heating to 45 ° C, controlling the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, ultrasonic for 16 minutes, controlling the speed to 550rpm, stirring and adjusting the pH value to 9 with 0.06M sodium hydroxide aqueous solution, continuing to heat to 85 ° C, maintaining the speed unchanged, stirring and dripping sodium silicate solution, controlling the dripping within 30 minutes, and after the dripping, adjusting the pH to 8.4 with 0.04M hydrochloric acid aqueous solution, aging for 2 hours, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 85 ° C to constant weight to obtain modified silicon dioxide, wherein the mass ratio of nano zinc oxide, deionized water, and sodium silicate solution is 4:62:8, and the concentration of the sodium silicate solution is 0.05M;

[0063] Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 were stirred at a speed of 600 rpm for 30 min until uniform, the temperature was raised to 64 ° C, the reaction was stirred at room temperature for 5.5 h, centrifuged, precipitated, washed with anhydrous ethanol and deionized water three times in sequence, and dried at 50 ° C to constant weight to obtain epoxy silica, and the epoxy silica and anhydrous DMF were ultrasonically dispersed, the ultrasonic frequency was controlled to 40 kHz, the ultrasonic power was 600 w, the ultrasonic was ultrasonicated for 22 min, the speed was controlled to 620 rpm, and tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous D were added dropwise while stirring MF mixed solution b was controlled to be dropped within 15 minutes. After the dropping was completed, the temperature was raised to 72°C and stirred for 3 hours. After the reaction was completed, the precipitate was centrifuged and washed three times with anhydrous ethanol and deionized water in sequence. It was dried at 60°C to constant weight to obtain functional components, wherein the dosage ratio of modified silica, deionized water, anhydrous ethanol and KH-560 was 4:16:34:0.5, the mass ratio of epoxy silica, anhydrous DMF and mixed solution b was 3.6:42:16, and in the mixed solution b, the mass ratio of tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF was 0.1:1.6:14.

[0064] Preparation Example 5

[0065] This preparation example provides a functional component, which is prepared by the following steps:

[0066] Step B1, placing the nano zinc oxide under vacuum drying at 78°C for 21h, then placing it in deionized water, heating it to 50°C, controlling the ultrasonic frequency to 40kHz, the ultrasonic power to 600w, ultrasonic for 19min, controlling the speed to 600rpm, adjusting the pH value to 9.5 with 0.07M sodium hydroxide aqueous solution while stirring, continuing to heat to 88°C, maintaining the speed unchanged, stirring and dripping sodium silicate solution, controlling the dripping to be completed within 30min, and after the dripping is completed, adjusting the pH to 8.5 with 0.05M hydrochloric acid aqueous solution, aging for 2h, filtering, washing with anhydrous ethanol and deionized water for 4 times in sequence, and drying at 90°C to constant weight to obtain modified silicon dioxide, wherein the mass ratio of nano zinc oxide, deionized water, and sodium silicate solution is 5:65:12, and the concentration of the sodium silicate solution is 0.06M;

[0067] Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 were stirred at a speed of 700 rpm for 35 minutes until uniform, the temperature was raised to 70 ° C, the reaction was stirred at room temperature for 6.0 hours, centrifuged, precipitated, washed with anhydrous ethanol and deionized water 4 times in sequence, and dried at 55 ° C to constant weight to obtain epoxy silica, the epoxy silica and anhydrous DMF were ultrasonically dispersed, tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF mixed solution b were added dropwise, and the dripping was controlled within 15 minutes. After the dripping was completed, the temperature was raised to 75 ° C and stirred for 3.5 hours. After the reaction was completed, centrifuged, precipitated, washed with anhydrous ethanol and deionized water 4 times in sequence, and dried at 65 ° C to constant weight to obtain a functional component, wherein the amount ratio of modified silica, deionized water, anhydrous ethanol and KH-560 was 4:18:38:0.65.

[0068] Preparation Example 6

[0069] This preparation example provides a functional component, which is prepared by the following steps:

[0070] Step B1, placing the nano zinc oxide at 80°C and vacuum drying for 24h, then placing it in deionized water, heating it to 55°C, controlling the ultrasonic frequency to 45kHz, the ultrasonic power to 650w, ultrasonic for 22min, controlling the speed to 650rpm, adjusting the pH value to 10 with 0.08M sodium hydroxide aqueous solution while stirring, continuing to heat to 90°C, maintaining the speed unchanged, stirring and dripping sodium silicate solution, controlling the dripping to be completed within 30min, and after the dripping is completed, adjusting the pH to 8.6 with 0.05M hydrochloric acid aqueous solution, aging for 2h, filtering, washing with anhydrous ethanol and deionized water for 5 times in sequence, and drying at 95°C to constant weight to obtain modified silicon dioxide, wherein the mass ratio of nano zinc oxide, deionized water, and sodium silicate solution is 6:68:16, and the concentration of the sodium silicate solution is 0.07M;

[0071] Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 were stirred at a speed of 700 rpm for 40 min until uniform, the temperature was raised to 76 ° C, the reaction was stirred at room temperature for 6.6 h, centrifuged, precipitated, washed with anhydrous ethanol and deionized water 5 times in sequence, and dried at 60 ° C to constant weight to obtain epoxy silica, and the epoxy silica and anhydrous DMF were ultrasonically dispersed, the ultrasonic frequency was controlled to 45 kHz, the ultrasonic power was 650 w, the ultrasonic was performed for 26 min, the speed was controlled to 640 rpm, and tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous D were added dropwise while stirring MF mixed solution b was dripped within 15 minutes, and after dripping, the temperature was raised to 78°C and stirred for 4 hours. After the reaction was completed, it was centrifuged, precipitated, washed with anhydrous ethanol and deionized water for 5 times in sequence, and dried at 70°C to constant weight to obtain functional components, wherein the dosage ratio of modified silica, deionized water, anhydrous ethanol and KH-560 was 4:20:42:0.8, the mass ratio of epoxy silica, anhydrous DMF and mixed solution b was 3.6:56:16, and in the mixed solution b, the mass ratio of tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF was 0.1:2.2:14.

[0072] Comparative Preparation Example 4

[0073] This comparative preparation example provides a functional component, which is prepared by the following steps:

[0074] Step B1, placing the nano zinc oxide at 76 ° C for 18 hours in vacuum drying, then placing it in deionized water, heating to 45 ° C, controlling the ultrasonic frequency to 35kHz, the ultrasonic power to 550w, ultrasonic for 16 minutes, controlling the speed to 550rpm, stirring and adjusting the pH value to 9 with 0.06M sodium hydroxide aqueous solution, continuing to heat to 85 ° C, maintaining the speed unchanged, stirring and dripping sodium silicate solution, controlling the dripping within 30 minutes, and after the dripping, adjusting the pH to 8.4 with 0.04M hydrochloric acid aqueous solution, aging for 2 hours, filtering, washing with anhydrous ethanol and deionized water for 3 times in sequence, and drying at 85 ° C to constant weight to obtain modified silicon dioxide, wherein the mass ratio of nano zinc oxide, deionized water, and sodium silicate solution is 4:62:8, and the concentration of the sodium silicate solution is 0.05M;

[0075] Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 were stirred at a speed of 600 rpm for 30 min until uniform, the temperature was raised to 64 ° C, the reaction was stirred at room temperature for 5.5 h, centrifuged, precipitated, washed with anhydrous ethanol and deionized water three times in sequence, and dried at 50 ° C to constant weight to obtain epoxy silica, and the epoxy silica and anhydrous DMF were ultrasonically dispersed, the ultrasonic frequency was controlled to 40 kHz, the ultrasonic power was 600 w, the ultrasonic was carried out for 22 min, the speed was controlled to 620 rpm, and tetrabutylammonium bromide, glycine and anhydrous D were added dropwise while stirring MF mixed solution b was dripped within 15 minutes, and after dripping, the temperature was raised to 72°C and stirred for 3 hours. After the reaction was completed, the mixture was centrifuged, and the precipitate was washed with anhydrous ethanol and deionized water for 3 times in sequence, and dried at 60°C to constant weight to obtain functional components, wherein the dosage ratio of modified silica, deionized water, anhydrous ethanol and KH-560 was 4:16:34:0.5, the mass ratio of epoxy silica, anhydrous DMF and mixed solution b was 3.6:42:16, and the mass ratio of tetrabutylammonium bromide, glycine and anhydrous DMF in mixed solution b was 0.1:1.6:14.

[0076] Examples 1-3 and Comparative Examples 1-4 provide an antibacterial car floor mat and a preparation method thereof.

[0077] Example 1

[0078] This embodiment provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight:

[0079] 82 parts of polyvinyl chloride, 13 parts of chlorinated polyethylene, 9 parts of the active antibacterial component prepared in Preparation Example 1, 36 parts of the functional component prepared in Preparation Example 4, 3.9 parts of calcium zinc composite stabilizer, 1.6 parts of polyethylene wax, 10762.2 parts of antioxidant and 13 parts of ultraviolet absorber UV-53;

[0080] The preparation method of the antibacterial car mat comprises the following steps:

[0081] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, polyethylene wax and antioxidant 1076, stir at 76°C for 14 minutes, add active antibacterial components and ultraviolet absorber UV-531, heat to 158°C, stir for 9 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168°C for banburying for 16 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 135°C, zone two is 155°C, zone three is 165°C, head is 160°C, stay for 3 minutes, pressure is 12Mpa, head temperature during injection molding is 182°C, injection pressure is 68MPa, extrusion rate is 1.2g / s, traction is 6N, and moving speed is 0.3m / min.

[0082] Example 2

[0083] This embodiment provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight:

[0084] 84 parts of polyvinyl chloride, 14 parts of chlorinated polyethylene, 10.5 parts of the active antibacterial component prepared in Preparation Example 2, 40 parts of the functional component prepared in Preparation Example 5, 4.2 parts of calcium zinc composite stabilizer, 2.8 parts of oxidized polyethylene wax, 1682.5 parts of antioxidant and 3.5 parts of ultraviolet absorber TBS;

[0085] The preparation method of the antibacterial car mat comprises the following steps:

[0086] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, oxidized polyethylene wax and antioxidant 168, stir at 80°C for 16 minutes, add active antibacterial components and ultraviolet absorber TBS, heat to 162°C, stir for 11 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 170°C for 19 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 140°C, zone two is 160°C, zone three is 170°C, die head is 175°C, dwell time is 4.5 minutes, pressure is 15 MPa, die head temperature during injection molding is 183°C, injection molding pressure is 69 MPa, extrusion rate is 1.3 g / s, traction is 6.1 N, and moving speed is 0.33 m / min.

[0087] Example 3

[0088] This embodiment provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight:

[0089] 86 parts of polyvinyl chloride, 15 parts of chlorinated polyethylene, 12 parts of the active antibacterial component prepared in Preparation Example 3, 44 parts of the functional component prepared in Preparation Example 6, 4.5 parts of calcium zinc composite stabilizer, 4.0 parts of monoglyceride of fatty acid, 10102.8 parts of antioxidant and 4 parts of ultraviolet absorber UV-P;

[0090] The preparation method of the antibacterial car mat comprises the following steps:

[0091] Add polyvinyl chloride into a high-speed mixer, add calcium zinc composite stabilizer, functional components, chlorinated polyethylene, monoglyceride and antioxidant 1010, stir at 84°C for 18 minutes, add active antibacterial components and ultraviolet absorber UV-P, heat to 166°C, stir for 13 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 172°C for banburying for 22 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 145°C, zone two is 165°C, zone three is 175°C, head is 170°C, dwell time is 6 minutes, pressure is 18Mpa, head temperature during injection molding is 184°C, injection pressure is 70MPa, extrusion rate is 1.4g / s, traction is 6.2N, and moving speed is 0.35m / min.

[0092] Comparative Example 1

[0093] This comparative example provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight: 82 parts of polyvinyl chloride, 13 parts of chlorinated polyethylene, 9 parts of the active antibacterial component prepared in comparative preparation example 1, 36 parts of the functional component prepared in preparation example 4, 3.9 parts of calcium zinc composite stabilizer, 1.6 parts of polyethylene wax, 10762.2 parts of antioxidant and 13 parts of ultraviolet absorber UV-53;

[0094] The preparation method of the antibacterial car mat comprises the following steps:

[0095] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, polyethylene wax and antioxidant 1076, stir at 76°C for 14 minutes, add active antibacterial components and ultraviolet absorber UV-531, heat to 158°C, stir for 9 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168°C for banburying for 16 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 135°C, zone two is 155°C, zone three is 165°C, head is 160°C, stay for 3 minutes, pressure is 12Mpa, head temperature during injection molding is 182°C, injection pressure is 68MPa, extrusion rate is 1.2g / s, traction is 6N, and moving speed is 0.3m / min.

[0096] Comparative Example 2

[0097] This comparative example provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight: 82 parts of polyvinyl chloride, 13 parts of chlorinated polyethylene, 9 parts of the active antibacterial component prepared in Comparative Preparation Example 2, 36 parts of the functional component prepared in Preparation Example 4, 3.9 parts of a calcium-zinc composite stabilizer, 1.6 parts of polyethylene wax, 10762.2 parts of an antioxidant, and 13 parts of an ultraviolet absorber UV-53;

[0098] The preparation method of the antibacterial car mat comprises the following steps:

[0099] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, polyethylene wax and antioxidant 1076, stir at 76°C for 14 minutes, add active antibacterial components and ultraviolet absorber UV-531, heat to 158°C, stir for 9 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168°C for banburying for 16 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 135°C, zone two is 155°C, zone three is 165°C, head is 160°C, stay for 3 minutes, pressure is 12Mpa, head temperature during injection molding is 182°C, injection pressure is 68MPa, extrusion rate is 1.2g / s, traction is 6N, and moving speed is 0.3m / min.

[0100] Comparative Example 3

[0101] This comparative example provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight: 82 parts of polyvinyl chloride, 13 parts of chlorinated polyethylene, 9 parts of the active antibacterial component prepared in Comparative Preparation Example 3, 36 parts of the functional component prepared in Preparation Example 4, 3.9 parts of a calcium-zinc composite stabilizer, 1.6 parts of polyethylene wax, 10762.2 parts of an antioxidant, and 13 parts of an ultraviolet absorber UV-53;

[0102] The preparation method of the antibacterial car mat comprises the following steps:

[0103] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, polyethylene wax and antioxidant 1076, stir at 76°C for 14 minutes, add active antibacterial components and ultraviolet absorber UV-531, heat to 158°C, stir for 9 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168°C for banburying for 16 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 135°C, zone two is 155°C, zone three is 165°C, head is 160°C, stay for 3 minutes, pressure is 12Mpa, head temperature during injection molding is 182°C, injection pressure is 68MPa, extrusion rate is 1.2g / s, traction is 6N, and moving speed is 0.3m / min.

[0104] Comparative Example 4

[0105] This comparative example provides an antibacterial car mat and a preparation method thereof. The antibacterial car mat comprises the following raw materials in parts by weight: 82 parts of polyvinyl chloride, 13 parts of chlorinated polyethylene, 9 parts of the active antibacterial component prepared in Preparation Example 1, 36 parts of the functional component prepared in Comparative Preparation Example 4, 3.9 parts of a calcium-zinc composite stabilizer, 1.6 parts of polyethylene wax, 10762.2 parts of an antioxidant, and 13 parts of an ultraviolet absorber UV-53;

[0106] The preparation method of the antibacterial car mat comprises the following steps:

[0107] Add polyvinyl chloride into a high-speed mixer, add calcium-zinc composite stabilizer, functional components, chlorinated polyethylene, polyethylene wax and antioxidant 1076, stir at 76°C for 14 minutes, add active antibacterial components and ultraviolet absorber UV-531, heat to 158°C, stir for 9 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168°C for banburying for 16 minutes, unload, crush and place in an injection molding machine for injection molding to obtain antibacterial car mats, wherein the process parameters during twin-screw extrusion mixing are: zone one is 135°C, zone two is 155°C, zone three is 165°C, head is 160°C, stay for 3 minutes, pressure is 12Mpa, head temperature during injection molding is 182°C, injection pressure is 68MPa, extrusion rate is 1.2g / s, traction is 6N, and moving speed is 0.3m / min.

[0108] Performance Testing

[0109] The antibacterial car mats prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to stretching (GB / T1040-2006 standard), UV aging (GB / T 16422.3-2014 standard) and antibacterial performance tests on Escherichia coli and Staphylococcus aureus according to the Japanese Industrial Standard "Antibacterial Processed Products-Antibacterial Test Method and Antibacterial Effect" (JIS Z2801-2010). The specific test results are shown in Table 1:

[0110] Table 1 Performance test of antibacterial car mats obtained from Examples 1-3 and Comparative Examples 1-4

[0111]

[0112] It can be seen from Table 1 that, compared with Comparative Examples 1-4, the antibacterial car mats prepared in Examples 1-3 have more excellent mechanical properties, anti-aging properties and antibacterial properties.

[0113] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An antibacterial car mat, characterized in that: The invention comprises the following raw materials in parts by weight: 82-86 parts of polyvinyl chloride, 13-15 parts of chlorinated polyethylene, 9-12 parts of active antibacterial components, 36-44 parts of functional components, 3.9-4.5 parts of heat stabilizer, 1.6-4.0 parts of lubricant, 2.2-2.8 parts of antioxidant and 3-4 parts of ultraviolet absorber; The active antibacterial component is firstly obtained by substitution reaction of cardanol and epichlorohydrin to obtain a modified monomer, then subjected to free radical polymerization reaction with dimethyldiallylammonium chloride to obtain a copolymer component, and finally subjected to ring-opening esterification reaction with 2,6-diaminopyridine to obtain the active antibacterial component. The functional component is firstly prepared by hydrolyzing sodium silicate under alkaline conditions to coat nano zinc oxide to obtain modified silicon dioxide, then treated with KH-560 to obtain epoxy silicon dioxide, and finally reacted with 6-aminocaproic acid through a ring-opening esterification reaction to obtain the functional component.

2. The antibacterial car mat according to claim 1, characterized in that: The active antibacterial component is prepared by the following steps: Step A1, ultrasonically disperse cardanol in anhydrous ethanol, raise the temperature to reflux while stirring, then add triethylamine and toluene, add epichlorohydrin dropwise, control the dripping to be completed within 10 minutes, complete the dripping, stir and react for 3-4 hours, after the reaction is completed, cool to room temperature, add alkali solution dropwise while stirring, control the dripping to be completed within 30 minutes, continue stirring for 0.5-1 hour, add alkali solution dropwise again, control the dripping to be completed within 20 minutes, continue stirring for 1.2-1.6 hours, filter under reduced pressure, wash, and dry to obtain a modified monomer; Step A2, adding the modified monomer to isopropanol, stirring evenly, heating to 68-74°C under nitrogen protection, dropping dimethyldiallylammonium chloride solution, stirring and reacting for 8-10h, adding ammonium persulfate and stirring and reacting for 1.6-2.4h, after the reaction, adding anhydrous ethanol, precipitating, filtering, and then soaking in acetone for 1-2h, filtering, washing, and drying to obtain a copolymer component; Step A3, add the copolymer component to anhydrous DMF, stir evenly, heat to 45-55°C, adjust the pH to 9-10, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30 minutes. After the dripping is completed, heat to 74-76°C, continue stirring and reacting for 5-7 hours, adjust the pH to neutral, rotary evaporate, wash and dry to obtain an active antibacterial component.

3. The antibacterial car mat according to claim 1, characterized in that: The active antibacterial component is prepared by the following steps: Step A1, ultrasonically disperse cardanol in anhydrous ethanol, raise the temperature to reflux while stirring, then add triethylamine and toluene, add epichlorohydrin dropwise, control the dripping to be completed within 10 minutes, complete the dripping, stir and react for 3-4 hours, after the reaction is completed, cool to room temperature, add alkali solution dropwise while stirring, control the dripping to be completed within 30 minutes, continue stirring for 0.5-1 hour, add alkali solution dropwise again, control the dripping to be completed within 20 minutes, continue stirring for 1.2-1.6 hours, filter under reduced pressure, wash, and dry to obtain a modified monomer; Step A2, adding the modified monomer to isopropanol, stirring evenly, heating to 68-74°C under nitrogen protection, dropping dimethyldiallylammonium chloride solution, stirring and reacting for 8-10h, adding ammonium persulfate and stirring and reacting for 1.6-2.4h, after the reaction, adding anhydrous ethanol, precipitating, filtering, and then soaking in acetone for 1-2h, filtering, washing, and drying to obtain a copolymer component; Step A3, add the copolymer component to anhydrous DMF, stir evenly, heat to 45-55°C, adjust the pH to 9-10, add a mixed solution a of 2,6-diaminopyridine and isopropanol dropwise while stirring, and control the dripping to be completed within 30 minutes. After the dripping is completed, heat to 74-76°C, continue stirring and reacting for 5-7 hours, adjust the pH to neutral, rotary evaporate, wash and dry to obtain an active antibacterial component.

4. The antibacterial car mat according to claim 2, characterized in that: In the step A2, the mass ratio of the modified monomer, isopropanol, dimethyldiallyl ammonium chloride solution, anhydrous ethanol and acetone is 2-4:62-74:16-22:20-24:26-30, the concentration of the dimethyldiallyl ammonium chloride solution is 0.6-0.8 g / mL, and the amount of ammonium persulfate used is 1-2% of the total mass of the modified monomer and dimethyldiallyl ammonium chloride.

5. The antibacterial car mat according to claim 2, characterized in that: In the step A3, the mass ratio of the copolymer component, anhydrous DMF and the mixed solution a is 2.5-3.5:60-70:22-26, and in the mixed solution a, the mass ratio of 2,6-diaminopyridine and isopropanol is 20-22:1.6-2.

0.

6. The antibacterial car mat according to claim 1, characterized in that: The functional component is prepared by the following steps: Step B1, drying the nano zinc oxide under vacuum conditions, then placing it in deionized water, heating it to 45-55°C, uniformly dispersing it by ultrasonication, adjusting the pH to 9-10, continuing to heat it to 85-90°C, dripping a sodium silicate solution, and controlling the dripping to be completed within 30 minutes. After the dripping is completed, adjusting the pH value to 8.4-8.6, aging for 2 hours, filtering, washing, and drying to obtain modified silicon dioxide; Step B2, the modified silica, deionized water, anhydrous ethanol and KH-560 are mixed evenly, the temperature is raised to 64-76 ° C, the reaction is stirred at room temperature for 5.5-6.6 hours, centrifuged, the precipitate is washed and dried to obtain epoxy silica, the epoxy silica and anhydrous DMF are ultrasonically dispersed, tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF mixed solution b are added dropwise, and the dripping is controlled within 15 minutes. After the dripping is completed, the temperature is raised to 72-78 ° C and stirred for 3-4 hours. After the reaction is completed, centrifuged, the precipitate is washed and dried to obtain the functional component.

7. The antibacterial car mat according to claim 6, characterized in that: In the step B1, the mass ratio of nano zinc oxide, deionized water and sodium silicate solution is 4-6:62-68:8-16, and the concentration of the sodium silicate solution is 0.05-0.07M.

8. The antibacterial car mat according to claim 6, characterized in that: In the step B2, the usage ratio of modified silica, deionized water, anhydrous ethanol and KH-560 is 4:16-20:34-42:0.5-0.

8.

9. The antibacterial car mat according to claim 6, characterized in that: In the step B2, the mass ratio of epoxy silicon dioxide, anhydrous DMF and mixed solution b is 3.6:42-56:16, and the mass ratio of tetrabutylammonium bromide, 6-aminocaproic acid and anhydrous DMF in the mixed solution b is 0.1:1.6-2.2:

14.

10. A method for preparing the antibacterial car mat according to any one of claims 1 to 9, characterized in that: The following steps are involved: Add polyvinyl chloride into a high-speed mixer, add a heat stabilizer, a functional component, chlorinated polyethylene, a lubricant and an antioxidant, stir at 76-84° C. for 14-18 minutes, add an active antibacterial component and an ultraviolet absorber, raise the temperature to 158-166° C., stir for 9-13 minutes, transfer to a twin-screw extruder, mix to obtain a premix, place the premix in a torque rheometer at 168-172° C. for 16-22 minutes, unload, crush and place in an injection molding machine for injection molding to obtain an antibacterial car mat.

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