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A kind of preparation method of organic-inorganic three-phase composite antifouling coating with spirulina biochar as carrier

A technology of antifouling coatings and biochar, applied in antifouling/underwater coatings, biocide-containing paints, coatings, etc., can solve the problems of inability to exert nanoscale cuprous oxide, reduce use efficiency, and poor dispersion. Achieve the effects of low cost, enhanced mechanical durability, and low equipment requirements

Active Publication Date: 2022-01-07
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Comparing micron-scale cuprous oxide with nanoscale cuprous oxide, although micron-scale cuprous oxide has stable chemical properties, it cannot exert the small size effect of nanoscale cuprous oxide, and its dispersion as a filler is poor, which greatly reduces the use efficiency; Nano-cuprous oxide is easy to agglomerate, and is easy to be coated inside the coating, and is not easy to release, resulting in the inability to play the corresponding effect

Method used

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  • A kind of preparation method of organic-inorganic three-phase composite antifouling coating with spirulina biochar as carrier
  • A kind of preparation method of organic-inorganic three-phase composite antifouling coating with spirulina biochar as carrier
  • A kind of preparation method of organic-inorganic three-phase composite antifouling coating with spirulina biochar as carrier

Examples

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Effect test

Embodiment 1

[0026] Example 1 (1) Soak Spirulina powder in 0.4 mol·L -1 In dilute hydrochloric acid, stirred at 500 rpm for 20 h, washed three times with deionized water, once with absolute ethanol, and dried. The dried solid was fully ground into powder, and in an argon atmosphere, at a heating rate of 5 °C·min -1 , heated to 600 °C, pyrolyzed for 2.5 h, cooled, taken out, and fully ground to obtain spirulina biochar powder.

[0027] (2) Add part of the biochar powder into a beaker filled with 40 mL of deionized water, stir at 500 rpm for 30 min, then add copper sulfate pentahydrate and polyvinylpyrrolidone powder with a mass ratio of 2:1, and continue stirring for 30 min , and finally add 10 mL of 0.5 mol·L -1 Sodium hydroxide aqueous solution and 10 mL ascorbic acid aqueous solution, the mass ratio of copper salt to reducing agent was 4:5, stirred and reacted for 1.2 h, the reacted particles were washed three times with water and once with absolute ethanol to obtain a loading capacity...

Embodiment 2

[0033] Example 2 (1) Soak Spirulina powder in 0.6 mol·L -1 In dilute hydrochloric acid, stirred at 800 rpm for 24 h, washed five times with deionized water, washed twice with absolute ethanol, and dried. The dried solid was fully ground into powder, and under an argon atmosphere, the temperature was increased at a rate of 8 °C min -1 , heated to 800 °C, pyrolyzed for 2.0 h, cooled, taken out, and fully ground to obtain spirulina biochar powder.

[0034] (2) Add part of the biochar powder into a beaker filled with 40 mL of deionized water, stir at 500 rpm for 30 min, then add copper sulfate pentahydrate and polyvinylpyrrolidone powder with a mass ratio of 2:1, and continue stirring for 30 min , and finally add 10 mL of 0.5 mol·L -1 Sodium hydroxide aqueous solution and 10 mL ascorbic acid aqueous solution, the ratio of copper salt to reducing agent is 4:5, stirred and reacted for 1.0 h, and the reacted particles were washed 5 times with water and 2 times with absolute ethanol...

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Abstract

A method for preparing an organic-inorganic three-phase composite antifouling coating using spirulina biochar as a carrier. The invention relates to a method for preparing an organic-inorganic three-phase composite antifouling coating which uses acrylic resin as a base film and spirulina biochar loaded with cuprous oxide nanoparticles as a filler. First, spirulina biochar was prepared by pyrolysis at high temperature; then, cuprous oxide nanoparticles prepared with ascorbic acid as a reducing agent were compounded on biochar by chemical liquid phase precipitation to prepare cuprous oxide / biochar composite filler After that, prepare an acrylic resin emulsion according to the monomer ratio; finally, add the cuprous oxide / biochar composite filler into the resin emulsion to disperse evenly, apply it to the surface of 304 stainless steel sheet, and cure to obtain a composite coating. The use of cuprous oxide / biochar composite filler makes the surface of the resin film form a micro-nano rough structure, which not only increases the mechanical properties of the film structure, but also reduces the agglomeration of the antifouling agent, which is conducive to the release of the antifouling agent and can effectively inhibit Attachment of fouling organisms.

Description

technical field [0001] The present invention uses spirulina biochar as a carrier, relates to an organic-inorganic three-phase composite antifouling coating with acrylic resin as a base film and cuprous oxide nanoparticles as an antifouling agent, and specifically relates to a preparation method of the composite material, And has good antifouling performance. Background technique [0002] Today, with the rapid development of the times, the development and utilization of marine resources, which occupy about 70% of the earth, has become a strategic goal for the sustainable development of human society. However, the complex marine environment poses a serious threat to the service of marine equipment. The resulting loss is huge, so the current research on antifouling coating materials has become a research hotspot in the field of antifouling. [0003] In the prior art, for example, the Chinese invention patent whose notification number is CN107022043B discloses a method for prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/12C09D5/16
CPCC09D133/12C09D5/1618C08K2003/2248C08K2201/011C08K9/12C08K3/22C08K3/04
Inventor 苏革于知非刘斌王文庆李正心
Owner OCEAN UNIV OF CHINA
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