Polyethylene composite antibacterial coating containing nanometer silver particles and preparation method thereof

A nano-silver particle and composite antibacterial technology, which is applied to coatings, biocide-containing paints, anti-corrosion coatings, etc., can solve problems that affect the protective and decorative effects of coatings, coatings lose adhesion, and biofilms spread diseases. , to achieve the effect of keeping the physical and chemical properties unchanged, high coating bonding strength and long service life

Active Publication Date: 2018-10-02
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While the coating plays a decorative and protective role on the substrate, it will be attacked by microorganisms, forming a biofilm on the surface of the coating, making the coating lose its adhesion, and even causing the coating to fall off, affecting the protective effect and decoration of the coating. Effect
On the other hand, biofilms on the surface of the coating can spread diseases and cause great harm to human health

Method used

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  • Polyethylene composite antibacterial coating containing nanometer silver particles and preparation method thereof
  • Polyethylene composite antibacterial coating containing nanometer silver particles and preparation method thereof
  • Polyethylene composite antibacterial coating containing nanometer silver particles and preparation method thereof

Examples

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preparation example Construction

[0032] Preparation of organic solutions of polyethylene (polyethylene solutions). The polyethylene is mixed with an organic solvent at a content of 1% to 5% (the polyethylene content refers to the mass ratio of the polyethylene to the mixed paint), and placed in a heater to heat and stir until the polyethylene is dissolved. If the polyethylene content is too small, the thickness of the coating after construction will be low; if the polyethylene content is too large, the deformation of the heat-sensitive substrate will be large during the construction process, and the microstructure of the coating will be rough. The temperature of heating and stirring can be 70-90° C. until the polyethylene is dissolved. The organic solvent used can be pure xylene or toluene or both mixed solutions, because the solubility parameter (8.9 or 8.8) of xylene or toluene is close to the polyethylene solubility parameter (8.0). When the solubility parameters of the materials are similar, they can be ...

Embodiment 1

[0039] Embodiment 1: the preparation of composite antibacterial coating (MPE1-Ag10)

[0040] The polyethylene substrate was ultrasonically cleaned with absolute ethanol and deionized water for 5 minutes, rinsed with deionized water for 5 times, and dried at 30°C for 2 hours before use. Metallocene polyethylene particles (ExxonMobil, MPE 2018HA) were mixed with xylene at a content of 1%, placed in a heater at 80°C for heating and stirring continuously, until the polyethylene was dissolved, and then a certain amount of nano silver particles (particles) were weighed. The diameter is 60-120nm, Aladdin Chemical Reagent Co., Ltd., S110974), ultrasonically dispersed in the aforementioned solution, the silver content is 10ppm, and the coating is prepared. Adopt air spraying technology (the parameter of described air spraying comprises: spraying air pressure 0.24Mpa, spraying distance 15cm, the speed of moving gun 2cm / s, the paint output of mixed coating is 80ml / min) spraying coating i...

Embodiment 2

[0041] Embodiment 2: the preparation of composite antibacterial coating (MPE5-Ag300)

[0042] The polyethylene substrate was ultrasonically cleaned with absolute ethanol and deionized water for 5 minutes, rinsed with deionized water for 5 times, and dried at 30°C for 2 hours before use. Metallocene polyethylene particles (ExxonMobil, MPE 2018HA) were mixed with xylene at a content of 5%, placed in a heater at 80°C for heating and stirring continuously, until the polyethylene was dissolved, and then a certain amount of nano silver particles (particles) were weighed. The diameter is 60-120nm), ultrasonically dispersed in the aforementioned solution, the silver content is 300ppm, and the coating is prepared. Adopt air spraying technology (the parameters of described air spraying include: spraying air pressure 0.24Mpa, spraying distance 15cm, the speed of moving gun 2cm / s, the paint output of mixed coating is 80ml / min.) Spraying coating is placed on polyethylene base After the su...

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Abstract

The invention relates to a polyethylene composite antibacterial coating containing nanometer silver particles and a preparation method thereof. The polyethylene composite antibacterial coating containing nanometer silver particles comprises polyethylene and nanometer silver particles uniformly distributed in polyethylene, wherein the mass fraction of the nanometer silver particles in the polyethylene composite antibacterial coating containing the nanometer silver particles is no less than 0.0714 wt%, preferably 0.0714 to 0.714 wt%. The preparation method of the invention has the advantages ofeasy operation, low spraying temperature, high efficiency, etc.; since a thermal spraying process is not utilized, the degradation and oxidation of polyethylene are effectively prevented, and the physical and chemical performance of the polymer is maintained unchanged. The polyethylene composite antibacterial coating containing the nanometer silver particles is applicable to the industries of foodpackaging, medical apparatuses and instruments, space equipment materials and the like. The coating can effectively reduce the consumption of Ag.

Description

technical field [0001] The invention relates to a polyethylene composite antibacterial coating containing nano-silver particles and a preparation method thereof. Specifically, it relates to a coating using polyethylene as the main film-forming material and nano-silver particles as an antibacterial agent, using air spraying technology The invention relates to a method for preparing a composite antibacterial coating on the surface of a metal, plastic or glass substrate, belonging to the technical field of antibacterial coating. Background technique [0002] Metal, plastic or glass substrates are widely used in the fields of food packaging, medical devices and aerospace equipment materials, but the adhesion of bacteria to the surface of these materials cannot be ignored. Bacteria on the surface of materials attach mainly by forming biofilms. [0003] Biofilm is a difficult-to-remove structured microbial community formed by bacteria attached to the surface of a material entity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/06C09D123/08C09D5/10C09D7/61C09D5/14B05D1/02B05D3/04
CPCB05D1/02B05D3/0406B05D3/0493C08K3/08C08K2003/0806C08K2201/011C09D5/10C09D5/14C09D123/06C09D123/0815
Inventor 祝迎春李林王云丽
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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