Durable antibacterial polypropylene composite material and preparation method thereof

A technology of antibacterial polypropylene and composite materials, applied in the field of polypropylene composite materials, can solve the problems of decreased antibacterial function and short service cycle, etc.

Active Publication Date: 2021-05-18
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention is only applicable to filter materials, such as disposable materials with a short life cycle such as masks
This technology cannot solve the problem of rapid decline in antibacterial functionality under long-term use conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for durable antibacterial polypropylene composite materials, the specific steps are as follows:

[0045] (1) Preparation of functional particles;

[0046] First disperse the antibacterial agent, nucleating agent and hydrazine metal passivator in water, then add porous silicate, stir evenly, filter and dry to obtain functional particles;

[0047] Among them, the mass of water added is 5 times that of porous silicate; the stirring speed is 300 rpm, the stirring time is 60 minutes, and the drying temperature is 150°C;

[0048] The mass ratio of porous silicate, antibacterial agent and nucleating agent is 100:5:5;

[0049] The porous silicate is granular, the average particle size of the porous silicate is 2μm, the average pore size of the pores is 5nm, and the static water adsorption is 24%;

[0050] The antibacterial agent is a zinc-containing inorganic silicate compound with a zinc content of 30%;

[0051] The average particle diameter of the antibacterial ag...

Embodiment 2

[0057] A method for durable antibacterial polypropylene composite materials, the specific steps are as follows:

[0058] (1) Preparation of functional particles;

[0059] First disperse the antibacterial agent, nucleating agent and hydrazine metal passivator in water, then add porous silicate, stir evenly, filter and dry to obtain functional particles;

[0060] Among them, the mass of water added is 5 times that of porous silicate; the stirring speed is 350 rpm, the stirring time is 45min, and the drying temperature is 125°C;

[0061] The mass ratio of porous silicate, antibacterial agent and nucleating agent is 100:10:5;

[0062] The porous silicate is granular, the average particle size of the porous silicate is 5μm, the average pore size of the pores is 6nm, and the static water adsorption is 25%;

[0063] The antibacterial agent is a zinc-containing inorganic silicate compound with a zinc content of 32.6%;

[0064] The average particle diameter of the antibacterial agen...

Embodiment 3

[0070] A method for durable antibacterial polypropylene composite materials, the specific steps are as follows:

[0071] (1) Preparation of functional particles;

[0072] First disperse the antibacterial agent, nucleating agent and hydrazine metal passivator in water, then add porous silicate, stir evenly, filter and dry to obtain functional particles;

[0073] Among them, the mass of water added is 5 times that of porous silicate; the stirring speed is 320 rpm, the stirring time is 55 minutes, and the drying temperature is 145°C;

[0074] The mass ratio of porous silicate, antibacterial agent and nucleating agent is 100:15:5;

[0075] The porous silicate is granular, the average particle size of the porous silicate is 3μm, the average pore size of the pores is 7nm, and the static water adsorption is 26%;

[0076] The antibacterial agent is a zinc-containing inorganic silicate compound with a zinc content of 32.4%;

[0077] The average particle diameter of the antibacterial...

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Abstract

The invention relates to a durable antibacterial polypropylene composite material and a preparation method thereof. The durable antibacterial polypropylene composite material comprises homo-polypropylene and functional particles in a mass ratio of 100:2-5; the functional particles comprise porous silicate, and an antibacterial agent and a nucleating agent which are loaded in holes of the porous silicate; in the functional particles, the mass ratio of the porous silicate to the antibacterial agent to the nucleating agent is 100:5-15:5-15; the preparation method comprises the following steps of: dispersing the antibacterial agent and the nucleating agent in a solvent, then adding the porous silicate, uniformly stirring the substances, and performing filtering and drying to obtain the functional particles; and putting the homo-polypropylene and the functional particles into a double-screw extruder, and conducting extruding and granulating to obtain the durable antibacterial polypropylene composite material. The prepared product is smooth in surface, has the flame-retardant effect and the antibacterial effect at the same time, does not turn yellow after being used for a long time, does not attenuate the antibacterial property, and is attractive in appearance and low in cost.

Description

technical field [0001] The invention belongs to the technical field of polypropylene composite materials, and relates to a durable antibacterial polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is widely used in household appliances, sanitary ware and other industries due to its low density, good transparency, easy processing, low cost, recyclability, and excellent mechanical properties. However, as an organic substance, polypropylene is very easy to breed bacteria, which brings more troubles in actual use. Whether the material has excellent antibacterial properties has also become a reference point for consumers to choose. The existing commonly used antibacterial agents include silver-based antibacterial agents, zinc-based antibacterial agents, organic antibacterial agents, and natural antibacterial agents. The mechanism of action of silver-based and zinc-based antibacterial agents is to migrate to the surface of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/12C08K3/34C08K3/08C08K5/23C08K5/25
CPCC08K13/06C08K9/12C08K3/34C08K3/08C08K5/23C08K5/25C08L2201/02C08L2205/24C08K2003/0893C08L23/12
Inventor 娄小安秦凡孔伟李鹏胡勇进阮静
Owner 上海日之升科技有限公司
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