A kind of antibacterial flame retardant polycarbonate composite material and preparation method thereof

Abstract

The invention discloses an antibacterial and flame-retardant polycarbonate composite material, which comprises the following components in parts by weight: 100 parts of polycarbonate; 0.1-10 parts of potassium perfluorobutyl sulfonate; 0.01-5 parts of nano zinc oxide ; Molecular weight is 0.01-5 part of siloxane polymer of 20-300,000; Based on the total weight of composite material, the content of silver ion is 200-600ppm. In the present invention, through the synergistic dispersion and migration of nano-zinc oxide and siloxane polymers with a molecular weight of 20-300,000, the concentration gradient of silver ions in the material increases from the inside to the surface, and with the wear and tear of the surface of the material The silver ions inside the material will migrate to the surface at a uniform rate along with the siloxane polymer with a molecular weight of 200,000 to 300,000, so that the material maintains a good and continuous antibacterial effect, and it has good color stability, good antibacterial performance, and antibacterial properties. Good combustion effect and other advantages.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to an antibacterial and flame-retardant polycarbonate composite material and a preparation method thereof. Background technique [0002] At present, polycarbonate (PC) is widely used in the production of various industrial and civil parts (such as various transparent parts, lampshades, instrument panels, etc.). With the improvement of living standards, people pay more and more attention to health. In order to avoid the reproduction of bacteria in plastic parts and improve the safety of products, the requirements for plastics to inhibit the reproduction of bacteria are becoming increasingly stringent. [0003] At present, the antibacterial agents used more in modified plastics are silver ion antibacterial agents. Due to their instability, these silver ions are easily oxidized into their oxides, losing the bactericidal effect and making the material gray. It is dif...

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Problems solved by technology

Moreover, the existing technology can only enrich the silver ion antibacterial agent on the surface of the material or evenly disperse it in the material. The former is easy to wear and lose antibacterial properties due to the surface of the material, and the latter is because the silver ion antibacterial agent is evenly distributed in the material. , there is very little silver ion antibacterial agent distributed on the surface, so the antibacterial effect is not good. The solution is generally to increase the amount of silver ion antibacterial agent and increase the cost

On the other hand, after the silver ion antibacterial agent on the surface of the material is worn away, the silver ion antibacterial agent present inside the material cannot migrate to the surface, so the durability of the material is poor

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