Surface modification method of cuprous oxide antifouling agent

A technology of cuprous oxide and surface modification, applied in chemical instruments and methods, biocide-containing paints, antifouling/underwater coatings, etc., can solve problems such as precipitation, easy condensation, and adverse effects on antifouling performance. To achieve the effect of prolonging the service life and improving the antifouling efficiency

Active Publication Date: 2012-12-05
ZHEJIANG MARINE DEV RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the cuprous oxide antifouling agent is prone to coagulation and precipitation during the storage of the antifouling paint, which brings many adverse effects on the antifouling performance, and provides a surface of the cuprous oxide antifouling agent. modified method from

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of chitosan-gum arabic cuprous oxide suspension

[0027] Take by weighing 10g chitosan and put it into a reaction vessel, stir and dissolve with 2500g mass concentration of acetic acid solution of 2wt%, then add 50g calcium chloride and stir to dissolve to obtain chitosan calcium chloride mixed solution; weigh 150g gum arabic Put it into a reaction container, dissolve it with distilled water, configure a gum arabic colloidal solution with a mass concentration of 3wt%, add 150g cuprous oxide and 7.5g triethylhexyl phosphoric acid to this solution, and stir to obtain a gum arabic cuprous oxide mixture ; In a water bath at 40°C, the above-mentioned gum arabic cuprous oxide mixed solution 4000ml is quickly poured into the stirred evenly In the chitosan calcium chloride mixed solution of 2000ml, stir to obtain chitosan-gum arabic cuprous oxide suspension;

[0028] 2) Preparation of chitosan-gum arabic cuprous oxide microcapsule solution

[0029] Remove the h...

Embodiment 2

[0033] 1) Preparation of chitosan-gum arabic cuprous oxide suspension

[0034] Weigh 10g and get chitosan and put it into a reaction vessel, dissolve it with 1000g mass concentration of 4wt% acetic acid solution, then add 40g calcium chloride and stir to dissolve to obtain chitosan calcium chloride mixed solution; weigh 150g gum arabic and put Put it into a reaction vessel, dissolve it with distilled water, configure a mass concentration of 3wt% gum arabic colloidal solution, add 200g cuprous oxide and 4g, sodium lauryl sulfate to this solution, and stir to obtain a gum arabic cuprous oxide mixed solution ; In a water bath at 60°C, pour 2500ml of the above-mentioned gum arabic cuprous oxide mixture into the well-stirred 1000ml chitosan calcium chloride mixture and stir to obtain a chitosan-gum arabic cuprous oxide suspension;

[0035] 2) Preparation of chitosan-gum arabic cuprous oxide microcapsule solution

[0036]Remove the homogeneously stirred chitosan-gum arabic cuprous ...

Embodiment 3

[0040] A method for surface modification of cuprous oxide antifouling agent, comprising the following steps:

[0041] 1) Preparation of chitosan-gum arabic cuprous oxide suspension

[0042] Take by weighing 10g chitosan and put it into a reaction vessel, stir and dissolve with 1250g mass concentration of 3wt% acetic acid solution, then add 60g calcium chloride and stir to dissolve to obtain chitosan calcium chloride mixed solution; weigh 160g gum arabic Put it into a reaction container, dissolve it with distilled water, configure a mass concentration of 3wt% gum arabic colloidal solution, add 200g cuprous oxide and 8g sodium dodecylbenzenesulfonate to this solution, and stir to obtain gum arabic cuprous oxide Mixed solution; in a water bath at 50°C, quickly pour 2250ml of the above-mentioned gum arabic cuprous oxide mixed solution into 1000ml of the chitosan calcium chloride mixed solution that is stirred evenly and stir evenly to obtain a suspension of chitosan-gum arabic cup...

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Abstract

The invention relates to a surface modification method of a cuprous oxide antifouling agent, which comprises the following steps that firstly, chitosan is dissolved in an acetic acid solution; secondly, the chitosan and a liquid mixture formed by dispersing cuprous oxide in a colloidal solution of gum arabic are mixed to obtain a chitosan-gum arabic cuprous oxide suspension; thirdly, the chitosan-gum arabic cuprous oxide suspension is cured to form a microcapsule solution under the action of a curing agent glutaraldehyde; and finally, the microcapsule solution is subjected to centrifugal separation and washing and drying to obtain chitosan-gum arabic cuprous oxide microencapsulated powder, i.e., the surface-modified cuprous oxide antifouling agent. The cuprous oxide antifouling agent prepared by a microencapsulation technology is not easily coagulated during the storage of antifouling paint, and the problem that the untreated cuprous oxide in the antifouling paint is precipitated is solved, therefore the antifouling efficiency is improved and the service life of the antifouling paint is prolonged.

Description

technical field [0001] The invention relates to a preparation method of an antifouling agent for antifouling paint, in particular to a method for surface modification of a cuprous oxide antifouling agent. Background technique [0002] The important problem encountered by ships navigating in the sea is the attachment and fouling of marine organisms to the bottom of the ship. Marine fouling organisms attaching to the bottom of the ship will increase navigation resistance, reduce ship speed, and consume more fuel; attaching to marine breeding nets will cause It will block the mesh and reduce the seawater exchange efficiency, which can lead to stunted or even death of cultured fish and shellfish; attach to marine instruments, which will cause signal distortion and performance degradation of the instruments; attach to torpedoes, increase weight and navigation resistance, and cause torpedo imbalance and failure. resulting in heavy losses. Applying antifouling coatings is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/00C09C3/10B01J13/02C09D5/16
Inventor 孙保库陆阿定孙兆栋郁小芬张海春范会生
Owner ZHEJIANG MARINE DEV RES INST
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