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High-dispersibility controlled-release silver composite anti-fouling agent and preparation method thereof

An antifouling agent, silver-based technology, applied in the field of coatings, can solve the problems of cumbersome procedures for purchase and use, high viscosity of liquid paraffin, difficult product handling, etc., and achieves the effects of high efficiency, improved dispersibility, and reduced contact area.

Inactive Publication Date: 2013-08-07
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: the high viscosity of liquid paraffin, the product is difficult to handle
The disadvantage of this method is: toluene takes a long time due to its low boiling point, and toluene is a precursor drug, and cumbersome procedures are required for purchase and use.

Method used

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  • High-dispersibility controlled-release silver composite anti-fouling agent and preparation method thereof
  • High-dispersibility controlled-release silver composite anti-fouling agent and preparation method thereof
  • High-dispersibility controlled-release silver composite anti-fouling agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of oil-soluble nano silver

[0040] Put 9L of xylene into a 10L three-necked flask, install a tetrafluoroethylene stirring rod, a condenser tube, and nitrogen protection, and seal the gas outlet with liquid paraffin; the stirring speed of the tetrafluoroethylene stirring rod is 350 rpm. After nitrogen protection, add 550 grams of octadecylamine, stir and dissolve, add 200 grams of silver nitrate, heat up to a slight boiling of the solution, keep it for 10 hours, cool down to stop the reaction, add 1.5L of absolute ethanol, mix, and centrifuge at 4000 rpm in a centrifuge Separation, the resulting solid was washed three times with ethanol, and dried at 60°C to obtain bright blue oil-soluble nano-silver particles that can dissolve xylene, toluene, n-hexane and other organic solvents. The particle size is about 15nm, such as figure 1 shown.

Embodiment 2

[0042] Preparation of oil-soluble nano silver

[0043] Put 900mL of xylene into a 1.0L three-necked flask, install a tetrafluoroethylene stirring rod, a condenser, and nitrogen protection, and seal the gas outlet with liquid paraffin; the stirring speed of the tetrafluoroethylene stirring rod is 350 rpm, and the After nitrogen protection, add 220 mL of oleylamine, stir to dissolve, add 10 grams of silver nitrate, heat up to a slight boiling of the solution, keep it for 6 hours, cool down to stop the reaction, add 100 mL of absolute ethanol, mix, and centrifuge at 4500 rpm in a centrifuge. The resulting solid was washed three times with ethanol and dried at 60°C to obtain bright blue oil-soluble silver nanoparticles. The particle size is about 7nm.

Embodiment 3

[0045] Preparation of oil-soluble nano silver

[0046] Put 500mL of xylene into a 1L three-necked flask, install a tetrafluoroethylene stirring rod, a condenser, and nitrogen protection, and seal the gas outlet with liquid paraffin; the stirring speed of the tetrafluoroethylene stirring rod is 350 rpm, and feed Add 100mL of n-octylamine after nitrogen protection, stir and dissolve, add 20g of silver acetate, raise the temperature until the solution boils slightly, keep it for 10 hours, cool down to stop the reaction, add 100mL of absolute ethanol, mix, and centrifuge at 4500 rpm in a centrifuge. The resulting solid was washed three times with ethanol and dried at 60°C to obtain bright blue oil-soluble silver nanoparticles. The particle size is about 25nm.

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Abstract

The invention relates to a high-dispersibility controlled-release silver composite anti-fouling agent and a preparation method thereof. The silver composite anti-fouling agent comprises oily nano silver and organic algicide and is characterized in that silicon dioxide is covered on the surface of the composite material, so that the anti-fouling agent can be controllably released and highly dispersed in aqueous paint or organosilicon modified resin paint and dose not contain toxic substances (such as tin or copper and the like) harmful to environment; and the oily nano silver and easy-degradable organic algicide are combined to form the composite anti-fouling agent. The preparation method has the advantages of low cost and short time.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a high-dispersibility and controllable-release composite antifouling agent for marine applications and a preparation method thereof. Background technique [0002] With the development of science and technology and the gradual deepening of people's understanding of the ocean, the image of the ocean presented to people is not only an important channel for world transportation, but also an important activity place for military affairs, economy, people's livelihood and scientific and technological exploration. However, marine fouling organisms attached to the bottom of the ship will increase navigation resistance, reduce ship speed, consume more fuel, and seriously affect combat effectiveness; attached to ocean detectors will cause instrument signal distortion and performance degradation; attached to breeding nets will cause Blocking the mesh, reducing seawater exchange efficiency, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/16
Inventor 尹衍升董丽华张玉良刘涛张福华
Owner SHANGHAI MARITIME UNIVERSITY