Antibacterial plastic as well as preparation method and application thereof
A technology of antibacterial plastics and plastic pellets, which is applied in the field of household kitchen utensils, can solve problems such as bacterial growth, achieve high antibacterial activity, facilitate mass production, and reduce costs
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[0016] In the antibacterial plastic of the present invention, nano-silver can be obtained commercially or prepared by oneself. For example, the preparation method of nano-silver can be a normal temperature reduction synthesis method, which includes: adding 5g PVP (polyvinylpyrrolidone) and 78ml deionized water to a round bottom flask, stirring for 5min (the solution is clear at this time), and then adding 10ml concentration 200mmol / L AgNO 3 solution, stir evenly, and then dropwise add 12ml of NaBH with a concentration of 0.1mol / L 4 solution, reacted for 2 minutes, and the color of the solution changed from colorless to brownish yellow. After the reaction was completed, the reaction product was washed with deionized water and absolute ethanol successively, and dried at 25°C.
[0017] In the antibacterial plastic of the present invention, nanometer zinc oxide can be obtained commercially or prepared by oneself. For example, the preparation method of nano-zinc oxide can be a co...
Embodiment 1
[0039] This embodiment is used to illustrate the antibacterial plastic of the present invention and its preparation method.
[0040] (1) 19g nano-silver, 1g zinc stearate, 3g magnesium stearate and 77g PP pellets were mixed in a high mixer for 8min, then the resulting mixture was melted and granulated in a twin-screw granulator to obtain nano Silver antibacterial masterbatch;
[0041] (2) Mix 22g of nano-zinc oxide, 1.5g of zinc stearate, 4.5g of magnesium stearate and 72g of PP pellets in a high mixer for 8 minutes, then melt and granulate the resulting mixture in a twin-screw granulator , to obtain nano zinc oxide antibacterial masterbatch;
[0042] (3) 2.2g nano-silver antibacterial masterbatch, 3g nano-zinc oxide antibacterial masterbatch and 94.8g PP pellets were mixed in a high-mixer for 12min, and the resulting mixture was injection molded to obtain a rice scoop. The injection molding conditions included: The temperature of the mold is 60°C, the temperature of the fro...
Embodiment 2
[0044] This embodiment is used to illustrate the antibacterial plastic of the present invention and its preparation method.
[0045] (1) 18g nano-silver, 1g zinc stearate, 2g magnesium stearate and 79g PVC pellets were mixed in a high mixer for 10min, then the resulting mixture was melted and granulated in a twin-screw granulator to obtain nano Silver antibacterial masterbatch;
[0046] (2) 25g nano zinc oxide, 2.7g zinc stearate, 5.3g magnesium stearate and 67g PVC pellets were mixed in a high mixer for 10min, then the resulting mixture was melted and granulated in a twin-screw granulator , to obtain nano zinc oxide antibacterial masterbatch;
[0047] (3) 2.5g nano-silver antibacterial masterbatch, 2g nano-zinc oxide antibacterial masterbatch and 95.5g PVC pellets were mixed in a high mixer for 15min, and the resulting mixture was injection molded to obtain a rice spoon. The injection molding conditions included: The temperature of the mold is 80°C, the temperature of the f...
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