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Poly-o-aminobenzenethiol nanometer metal composite particle and preparation method

A technology of o-aminothiophenol and nano-metal, which is applied in the direction of coating to achieve the effect of preventing agglomeration, high reproducibility and preventing loss

Inactive Publication Date: 2014-12-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Poly-o-aminobenzenethiol nanometer metal composite particle and 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 0.002-0.006 mol metal nitrate in 20-80mL dispersing-stabilizer solution with a concentration of 2%-8% by mass, and use mechanical stirring to make the above mixed solution foam. The amount is 5 times the volume of the dispersant-stabilizer solution, take 0.001-0.005 mol reducing agent and dissolve it in ice water, after the dissolution is complete, drop the reducing agent solution into the metal nitrate-dispersant solution drop by drop, 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 a centrifuge tube, and perform centrifugation at 2000 r / min for 2-4 min. Dilute the colloidal metal obtained by 100 times and conduct ultraviolet analysis to verify the concentration of nano-metal particles. synthesis;

...

Embodiment 1

[0040] 1) Dissolve 0.002mol copper nitrate in 20mL 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 2000 r / min for 2 min, dilute the obtained colloidal metal by 100 times, and conduct ultraviolet analysis to verify the synthesis of nano-copper particles ;

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

Embodiment 2

[0046] 1) Dissolve 0.004 mol silver nitrate in 40mL 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 the centrifuge tube, and perform centrifugation at 2000 r / min for 3 minutes, dilute the obtained colloidal metal 100 times, and then conduct ultraviolet analysis to verify the concentration of silver nanoparticles. synthesis.

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

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Abstract

The invention discloses a poly-o-aminobenzenethiol nanometer metal composite particle and a preparation method. The poly-o-aminobenzenethiol nanometer metal composite particle has a nuclear shell self-assembly structure. The preparation method comprises the steps that nanometer metal particles are produced through metal salt under the protection of dispersion-stabilizer by taking sodium borohydride as the reducing agent; the surface layer of the nanometer metal particle is bonded stably with the sulfydryl of o-aminobenzenethiol; the solution polymerization of o-aminobenzenethiol is then triggered with ammonium persulfate as the oxidant, so that the poly-o-aminobenzenethiol nanometer metal composite particle is obtained. The core of the composite particle is nanometer metal, and the shell of the composite particle is sulfydryl grafted polyaniline; the sterilization property of the nanometer metal and the biotoxicity of polyaniline realizes synergistic effect, meanwhile, polyaniline is insoluble in water, and the environmental safety of antibacterial powder is improved. The poly-o-aminobenzenethiol nanometer metal composite particle and the preparation method have the advantages that the specific surface is large, the antibiosis range is large, the sterilization effect is durable, the conductivity is high and stable, the service life is long, the composite particle can be used as antiseptic agent and antifouling additive, and is particularly suitable for marine antiseptic antifouling paint.

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