Inorganic nano antibacterial hard PVC (polyvinyl chloride) and preparation method thereof

Abstract

The invention belongs to the field of antibacterial plastics and discloses inorganic nano antibacterial hard PVC (polyvinyl chloride) and a preparation method thereof. The preparation method comprisesthe following steps: adding an inorganic non-metallic nano-filler into water so as to obtain slurry, adding a coupling agent, performing a stirring reaction, performing suction filtration, drying, crushing and screening on the slurry after the reaction, and further performing ball milling by using a ball mill so as to obtain an inorganic nano antibacterial agent; and mixing rigid polyvinyl chloride, the inorganic nano antibacterial agent and an additive, and performing extraction molding, so as to obtain the inorganic nano antibacterial hard PVC. The antibacterial agent is prepared from the inorganic non-metallic nano filler through a special treatment process, the antibacterial ability of the antibacterial agent can be improved, the antibacterial agent can be uniformly dispersed into PVCwhile the nano dimension is maintained, and the inorganic nano antibacterial agent is not liable to migrate, so that the antiseptic antibacterial ability of the hard PVC can be ensured, the hard PVCis simple and convenient to use and has long-term effectiveness, and in addition, the impact resistance of the hard PVC can be improved.

Description

technical field [0001] The invention belongs to the field of antibacterial plastics, and in particular relates to an inorganic nano antibacterial hard PVC and a preparation method thereof. Background technique [0002] At present, polyvinyl chloride (PVC) is one of the five general-purpose plastics, and its annual output is second only to polyethylene. It is widely used, easy to process and produce, easy to market, and has excellent physical properties, such as low density, high strength, and oil resistance. Good performance, chemical resistance, high transparency, excellent flame retardancy, high insulation, and low price, it is widely used in various industries and fields, and has become the second largest general-purpose plastic. And from the perspective of my country's plastic production situation, the output of rigid polyvinyl chloride accounts for about 60% of its total output. However, because polyvinyl chloride does not have antibacterial properties, its surface wil...

AI Technical Summary

Problems solved by technology

Although the patent uses organic antibacterial agents and inorganic antibacterial agents in combination to improve the antibacterial effect of materials, most organic antibacterial agents have toxicity, poor safety, and easy migration (resulting in short antibacterial life). Decomposition fails during processing, and the decomposed substances are even toxic, resulting in safety problems and short antibacterial life of the PVC antibacterial plastic

[0006] Chinese invention patent application CN106009396A discloses an antibacterial plastic. Polyvinyl chloride and nano-zinc oxide are directly blended to obtain a composite material. The composite material obtained by this method will release nano-zinc oxide into the environment, resulting in a short antibacterial life of the composite material. and environmental pollution

Chinese invention patent application CN103951910B discloses a polyvinyl chloride composite plastic and its preparation method. This material has poor antibacterial properties and also has the problem of migration of nano-zinc oxide.

In addition, the nano-zinc oxide in the polyvinyl chloride / nano-zinc oxide antibacterial material disclosed in the above patents is easy to agglomerate, and the effective specific surface area is small, resulting in a low sterilization rate of the material, which limits its application range

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