Antibacterial polycarbonate composite and preparation method and application thereof

Abstract

The invention discloses an antibacterial polycarbonate composite. The antibacterial polycarbonate composite includes, by weight, the following components of 100 parts of polycarbonate, 0.01 to 5 partsof nano metal oxides, 0.01 to 5 parts of siloxane type polymer containing hydroxyl and alkyl branched chains and / or siloxane polymer containing hydroxyl and phenyl branched chains; based on the total weight of the antibacterial polycarbonate composite, the silver ion content is 100-1200 parts per million. With nano-oxides added to increase the dispersion of silver ions and with the siloxane typepolymer containing the hydroxyl and alkyl branched chains and / or the siloxane polymer containing the hydroxyl and phenyl branched chains added as color stabilizers, the antibacterial polycarbonate composite has the advantages of good color stability and antibacterial properties.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to an antibacterial polycarbonate composite material, a preparation method and an application thereof. technical background [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 bacterial reproduction are becoming increasingly stringent. [0003] At present, the most antibacterial agents used in modified plastics are metal ion antibacterial agents. Due to their instability, these metal ions are easily oxidized during processing or even during use, which not only loses the bactericidal function but also makes t...

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Problems solved by technology

[0003] At present, the most antibacterial agents used in modified plastics are metal ion antibacterial agents. Due to their instability, these metal ions are easily oxidized during processing or even during use, which not only loses the bactericidal function but also makes the material color darken

Especially in engineering plastics, such as polycarbonate resin, the processing temperature is often higher than 300 ° C, so how to make the antibacterial agent stable and maintain the effect in the higher processing technology is more difficult, the existing technology can be increased by The amount of toner is used for appearance modification, but increasing the amount of toner will greatly increase the cost of materials and will directly affect the heat resistance of polycarbonate materials

Chinese patent 201610555237.5 discloses a yellow-resistant nano-silver antibacterial polycarbonate material. This patent uses a metal ion passivator to prevent the material from turning yellow at high temperature during processing, but it does not consider the dispersion of silver ions in the material.

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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