Preparation system of antibacterial plastic
An antibacterial plastic and preparation system technology, applied in the system field, can solve the problems of easy moldy, various pathogenic bacteria, difficult degradation of polyvinyl chloride, health hazards, etc., and achieve good degradable performance, extensive antibacterial properties, good resistance The effect of UV rays
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Embodiment 1
[0037] 1. Preparation steps of modified graphene oxide dispersion
[0038] (1) Mix 5 g of graphite powder, 2 g of sodium nitrate, and 100 mL of concentrated sulfuric acid in an ice-water bath, and slowly add KMnO to the mixture 4 14g, stirred at 600rpm for 0.5h, then raised the temperature to 30°C, continued to stir for 4h, and added the same amount of KMnO 4 After stirring for 10 hours under the same conditions, add a large amount of deionized water, stir for 0.5 hours, add hydrogen peroxide until the solution is bright yellow, filter with suction, and wash the filter cake with 5% hydrochloric acid solution and deionized water to the pH value 4, dried at room temperature to obtain graphene oxide;
[0039] (2) Add 5g of graphene oxide to 50mL of DMF and ultrasonically disperse evenly, then add 30mL of ethylenediamine and 9mL of ammonia water and stir at room temperature for 1h, transfer to a 50°C water bath to react for 5h, filter, and wash the filter cake repeatedly with abs...
Embodiment 2
[0056] 1. Preparation steps of modified graphene oxide dispersion
[0057] (1) Mix 6 g of graphite powder, 2.5 g of sodium nitrate, and 105 mL of concentrated sulfuric acid in an ice-water bath, and slowly add KMnO to the mixture 4 15g, stirred at 700rpm for 45min, then heated to 35°C, continued to stir for 4.5h, and added the same amount of KMnO 4 After stirring for 11 hours under the same conditions, add a large amount of deionized water. After stirring for 45 minutes, add hydrogen peroxide until the solution is bright yellow, filter with suction, and wash the filter cake with 5% hydrochloric acid solution and deionized water to the pH value. 4.5, drying at room temperature to obtain graphene oxide;
[0058] (2) Add 6g of graphene oxide to 55mL of DMF and ultrasonically disperse evenly, then add 31mL of ethylenediamine and 10mL of ammonia water and stir at room temperature for 1.5h, transfer to a 55°C water bath for 6h, filter, and wash the filter cake with absolute ethanol...
Embodiment 3
[0070] 1. Preparation steps of modified graphene oxide dispersion
[0071] (1) Mix 7g of graphite powder, 3g of sodium nitrate, and 110mL of concentrated sulfuric acid in an ice-water bath, and slowly add KMnO to the mixture 4 16g, stirred at 800rpm for 1h, then raised to 40°C, continued stirring for 5h, and added the same amount of KMnO 4 After stirring for 12 hours under the same conditions, add a large amount of deionized water. After stirring for 1 hour, add hydrogen peroxide until the solution is bright yellow, filter with suction, and wash the filter cake with 5% hydrochloric acid solution and deionized water to the pH value. 5, dried at room temperature to obtain graphene oxide;
[0072] (2) Add 7g of graphene oxide into 60mL of DMF and ultrasonically disperse evenly, then add 32mL of ethylenediamine and 11mL of ammonia water and stir at room temperature for 2h, then transfer to a water bath at 60°C for 7h, filter, and wash the filter cake repeatedly with absolute etha...
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