Highly-antibacterial polypropylene composite material and preparation method thereof

Abstract

The invention discloses a highly-antibacterial polypropylene composite material and a preparation method thereof. The preparation method comprises the steps that doped nano TiO2 particles are firstly obtained through doping nano TiO2 particles; then modified nano TiO2 particles are obtained by coupling and modifying the doped nano TiO2 particles; and furthermore, the modified nano TiO2 particles and polypropylene are melted and extruded, and then the highly-antibacterial polypropylene composite material is manufactured. The highly-antibacterial polypropylene composite material comprises following raw materials by weight percentage: 63 to 97 percent of polypropylene, 1 to 5 percent of modified nano TiO2 particles, 0 to 20 percent of other inorganic filler, 0 to 10 percent of elastomer, 0.2 to 1 percent of dispersants, 0.1 to 1 percent of antioxidants and 0 to 3 percent of other additives. The preparation method has the advantages that on the basis that the original performance of a polypropylene material is guaranteed, the polypropylene composite material is endowed with excellent antibacterial activity, so that the polypropylene composite material can be excited by weak ultraviolet light in sunlight or lighting lamp light to produce a photocatalysis effect and develop a very strong bacteriostatic ability over Escherichia coli and staphylococcus aureus.

Description

technical field [0001] The present invention relates to a kind of high antibacterial polypropylene composite material and preparation method thereof, more specifically is through nano-TiO 2 Particles are subjected to doping treatment and coupling modification treatment to obtain modified nano-TiO 2 The particle is melted and extruded with polypropylene to prepare a high antibacterial polypropylene composite material, which belongs to the field of polymer modification and processing. Background technique [0002] Plastic plays an increasingly important role in people's daily life. As a non-toxic plastic, polypropylene is widely used in various places, such as household appliances, automotive interior and exterior trim, fitness equipment, office supplies, daily necessities, toys and sanitary ware, due to its low density, low price and good processing performance and other fields. As people's awareness of health and environmental protection increases, they gradually realize ...

AI Technical Summary

Problems solved by technology

The method commonly used at present is to dope silver, such as Chinese patent CN2004100419011, although this method can increase the antibacterial activity, but due to the problems of high cost and easy discoloration of silver, its application is limited to a certain extent

In addition, due to nano-TiO 2 The surface energy of the particles is high, and the particles self-assemble to form agglomerates, which are not easy to generate active groups, and cannot exert the proper antibacterial performance, thus affecting the antibacterial performance of the composite material

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