Nano-silver loaded graphene antibacterial agent and graphene in-situ reduction nano-silver loaded water-based antibacterial coating

A graphene and nano-silver technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve poor dispersion, antibacterial efficiency, insufficient antibacterial persistence, and low utilization of silver components and other problems, to achieve the effect of increasing the specific surface area, excellent antibacterial effect, and reducing the particle size

Inactive Publication Date: 2018-03-20
福建宸琦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the size of silver particles becomes smaller, the number of atoms on the surface of the particles increases significantly, even more than the number of atoms inside the particles, thus showing a series of excellent properties different from bulk silver. It has bee

Method used

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  • Nano-silver loaded graphene antibacterial agent and graphene in-situ reduction nano-silver loaded water-based antibacterial coating
  • Nano-silver loaded graphene antibacterial agent and graphene in-situ reduction nano-silver loaded water-based antibacterial coating
  • Nano-silver loaded graphene antibacterial agent and graphene in-situ reduction nano-silver loaded water-based antibacterial coating

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preparation example Construction

[0040] The preparation method step of described graphene-supported nano-silver antibacterial agent is as follows:

[0041] Step 1. Prepare graphene oxide by the improved Hummers method; slowly add 23-40mL of concentrated sulfuric acid into a beaker with 1-2g flake graphite at room temperature, and stir evenly; after stirring for 15min, add 3-4.5g of potassium permanganate Slowly add it into the above beaker, stir for 4 hours; then slowly add 25-50mL of deionized water into the above beaker, then add hydrogen peroxide drop by drop at room temperature until the liquid in the beaker turns golden yellow; finally use hydrochloric acid and deionized Washing with ionic water until the pH is 7, and freeze-drying for 8 hours to obtain graphene oxide;

[0042] Step 2, carry out surface modification treatment to the graphene oxide obtained in step 1 with 3-aminopropyltriethoxysilane; disperse the graphene oxide obtained in step 1 in ethanol solution, described ethanol solution is made of...

Embodiment 1

[0045] A kind of graphene in-situ reduction loaded nano-silver water-based antibacterial coating comprising the graphene-loaded nano-silver antibacterial agent prepared by the above-mentioned preparation method, embodiment 1 disclosed by the invention, in parts by weight, its raw materials consist of:

[0046]

[0047]

Embodiment 2

[0048] A kind of graphene in-situ reduction loaded nano-silver water-based antibacterial coating comprising the graphene-loaded nano-silver antibacterial agent prepared by the above-mentioned preparation method, embodiment 2 disclosed by the invention, in parts by weight, its raw materials consist of:

[0049]

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Abstract

The invention discloses a nano-silver loaded graphene antibacterial agent, a graphene in-situ reduction nano-silver loaded water-based antibacterial coating, and a preparation method of coating. The nano-silver loaded graphene antibacterial agent is prepared from the following components: graphene oxide, silver nitrate, polyvinylpyrrolidone and sodium borohydride. The graphene in-situ reduction nano-silver loaded water-based antibacterial coating o is prepared from the following raw materials in parts by weight: 25-35 parts of water, 30-40 parts of acrylic resin, 20-30 parts of polyurethane resin, 2-3 parts of the nano-silver loaded graphene antibacterial agent, 1.5-2.5 parts of a dispersant, 1-1.5 parts of a curing agent, 0.8-1 part of a defoamer, 0.5-0.8 part of film formation aid and 0.5-0.8 part of levelling agent. Under the combined action of graphene and nano-silver, the antibacterial efficiency, the antibacterial time and the antibacterial property of the coating can be greatlyimproved; the coating is excellent in antibacterial effect, long in antibacterial time, free of toxicity, free of pollution, high in water resistance and weather resistance, and high in adhesion; thenano-silver is loaded in graphene in situ, is incapable of settling, and can be uniformly dispersed in emulsion.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to an antibacterial agent and coating with graphene-loaded nano-silver and a preparation method thereof. Background technique [0002] The development of paint has a long history. More than 3,000 years ago, the ancient people of our country could use natural oils and resins such as tung oil and rosin to make paint. Since the eighteenth century, the development of modern natural science and the establishment of organic chemistry have laid a solid theoretical foundation for the research of coatings, and coatings have officially entered the industrial stage. From the nineteenth century to the twentieth century, with the establishment and development of polymer chemistry, coatings began to gradually move towards the era of synthetic resins, and epoxy, amino, nitro, polyester, polyurethane, acrylic, silicone, fluorocarbon, etc. appeared successively. Functional coatings. In the 21st ce...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D175/04C09D7/62C09D7/65C09D5/14
CPCC09D133/00C08L2205/035C09D5/14C08L75/04C08L83/04C08L33/00C08K9/12C08K3/08
Inventor 林卓哲郑玉婴
Owner 福建宸琦新材料科技有限公司
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