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A kind of poly-o-aminothiophenol-nanometer metal composite particle and its preparation method

A technology of o-aminothiophenol and nano-metal, which is applied in the direction of coating and the like to achieve the effects of expanding the scope of application, preventing agglomeration, and having a simple preparation method.

Inactive Publication Date: 2016-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This nano-core-shell composite has not been reported in marine antifouling coatings

Method used

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  • A kind of poly-o-aminothiophenol-nanometer metal composite particle and its preparation method

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preparation example Construction

[0031] The steps of the preparation method of poly-o-aminothiophenol-nano metal composite particles are as follows:

[0032] 1) In an ice bath environment, dissolve 0.002-0.006mol metal nitrate in 20-80mL dispersion-stabilizer solution with a mass percent concentration of 2%-8%, and use mechanical stirring to make the above mixed solution foam and foam The amount is 5 times of the volume of the dispersion-stabilizer solution, take 0.001-0.005mol reducing agent and dissolve it in ice water, after the dissolution is complete, drop the reducing agent solution dropwise into the metal nitrate-dispersing agent solution, so that the Metal ions are completely transformed into metal elements;

[0033] 2) After the above reaction is complete, add the reaction solution in step 1 into the centrifuge tube, and perform centrifugation at 2000r / min for 2-4min, dilute the obtained colloidal metal 100 times and conduct ultraviolet analysis to verify the synthesis of nano-metal particles;

[00...

Embodiment 1

[0040] 1) Dissolve 0.002mol of copper nitrate in 20mL of 8% polyvinyl alcohol solution in an ice bath environment. Use mechanical stirring to make the above mixed solution foam. The foaming amount is 5 times the volume of the dispersion-stabilizer solution. Take 0.001mol sodium borohydride and dissolve it in ice water. After the dissolution is complete, add the sodium borohydride solution drop by drop to copper nitrate -in the polyvinyl alcohol solution, the copper ions in the reaction solution are completely converted into copper simple substance;

[0041] 2) After the above reaction is complete, add the reaction solution in step 1) to the centrifuge tube, and perform centrifugation at 2000r / min for 2 minutes, dilute the obtained colloidal metal 100 times, and conduct ultraviolet analysis to verify the synthesis of nano-copper particles;

[0042] 3) Take 0.0005mol o-aminothiophenol and add it to 1mol / L hydrochloric acid solution, sonicate it to dissolve it completely, take an...

Embodiment 2

[0046] 1) Dissolve 0.004mol of silver nitrate in 40mL of 4% polyethylene glycol solution in an ice bath environment. Use mechanical stirring to make the above mixed solution foam, and the foaming amount is 5 times of the volume of the dispersion-stabilizer solution. Take 0.001 mol of sodium borohydride and dissolve it in ice water. After the dissolution is complete, add the sodium borohydride solution drop by drop into the silver nitrate-polyethylene glycol solution, so that the silver ions in the reaction solution are completely converted into simple silver.

[0047] 2) After the above reaction is complete, add the reaction solution in step 1) to a centrifuge tube, and perform centrifugation at 2000r / min for 3 minutes, dilute the obtained colloidal metal 100 times, and conduct ultraviolet analysis to verify the synthesis of nano-silver particles.

[0048] 3) Take 0.001mol o-aminothiophenol and add it to 1mol / L hydrochloric acid solution, sonicate it to dissolve completely, ta...

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Abstract

The invention discloses a poly-o-aminothiophenol-nanometer metal composite particle and a preparation method thereof. It has a core-shell self-assembled structure. Its preparation method is that the metal salt is under the protection of a dispersion-stabilizer, and sodium borohydride is used as a reducing agent to prepare nano-metal particles; the surface layer of the nano-metal particles is stably combined with the sulfhydryl group on the o-aminothiophenol; Ammonium is used as an oxidant to initiate the solution polymerization of o-aminothiophenol to obtain poly-o-aminothiophenol-nano metal composite particles. The core of the composite particle is nano-metal, and the outer shell is mercapto-grafted polyaniline. The sterilization of nano-metal and the biotoxicity of polyaniline have a synergistic effect. At the same time, polyaniline is insoluble in water, which improves the environmental safety of antibacterial powder. The invention has the advantages of large specific surface, wide antibacterial range, long-lasting bactericidal effect, high conductivity, stability, and long service life, and can be used as an anti-corrosion and anti-fouling additive, especially suitable for marine anti-corrosion and anti-fouling coatings.

Description

technical field [0001] The invention relates to a poly-o-aminothiophenol-nanometer metal composite particle and a preparation method. Background technique [0002] Common antifouling coatings are mainly composed of resins, antifouling agents, auxiliary materials, fillers and solvents. After forming a coating film on the metal surface, it is an antifouling coating. As the mainstay of antifouling coatings, in the 1970s, organic tin (TBT) acrylic resin self-polishing composites had an antifouling validity period of more than 5 years and the characteristics of keeping the bottom of the ship smooth. However, organotin coatings have caused significant damage to the marine ecological environment and can endanger human health through the food chain. Finding an environment-friendly marine antifouling coating has become a technical problem to be solved urgently. [0003] In recent years, it has been reported that marine corrosion originates from microorganisms, and the metabolites o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F9/16B22F1/02
Inventor 赵国辰黄元凤秦文莉叶瑛裘林莉
Owner ZHEJIANG UNIV
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