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A biodegradable polymer marine antifouling material and its preparation and application

A marine antifouling and biodegradable technology, applied in antifouling/underwater coatings, paints containing biocides, polyurea/polyurethane coatings, etc., can solve problems such as marine microplastic pollution, achieve good mechanical properties, and avoid pollution Problems, the effect of broad application prospects

Active Publication Date: 2021-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the polyester main chain of the antifouling material can be degraded into non-toxic small molecules in seawater, which solves the problem of marine microplastic pollution caused by traditional self-polishing antifouling materials because the main chain cannot be degraded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 12.5 g of polymethylethylene carbonate with a molecular weight of 2000 g / mol was dehydrated under vacuum at 120° C. for 2 hours to obtain a dehydrated product;

[0039] (2) Cool the dehydrated product to 70°C, add 40mL of xylene and 12.0g of diphenylmethane diisocyanate (MDI), stir and react for 1h under nitrogen protection; then add 1.6g of 1,4-butanediol, 2,2 - 3.2g of dimethylolpropionic acid and 0.1g of stannous octoate, the temperature was raised to 80°C, and the stirring reaction was continued for 3h to obtain a product containing polyurethane;

[0040] (3) Add 1.4g of magnesium hydroxide, 6.8g of stearic acid and 10mL of xylene to the product containing polyurethane in step (2), stir at 100°C until 0.8g of water is collected, and discharge to obtain a biodegradable Polymer marine antifouling material. The marine anti-fouling material was painted on the steel plate pre-coated with epoxy anti-corrosion primer, and the shallow sea hanging plate test showed that...

Embodiment 2

[0042] (1) 50.0 g of poly(caprolactone-lactide) with a molecular weight of 2000 g / mol was dehydrated under vacuum at 120° C. for 2 hours to obtain a dehydrated product;

[0043] (2) Cool the dehydrated product to 60°C, add 80.0 mL of dimethylformamide and 15.1 g of lysine diisocyanate (LDI), stir and react for 1 h under the protection of nitrogen; then add 1.6 g of 1,4-butanediol, 2 , 3.2g of 2-dimethylolpropionic acid and 0.2g of dibutyltin dilaurate, and continue to stir and react at 70°C for 3h to obtain a product containing polyurethane;

[0044] (3) Add 2.3g of zinc hydroxide, 1.5g of acetic acid and 10.0mL of dimethylformamide to the product containing polyurethane in step (2), and stir at 110°C until 0.8g of water is collected to obtain a biodegradable Polymer marine antifouling material. The marine antifouling material is painted on the epoxy fiber board, and the shallow sea hanging board experiment shows that no marine organisms grow for 8 months.

Embodiment 3

[0046] (1) 30.0 g of poly-3-hydroxybutyrate with a molecular weight of 10,000 g / mol was dehydrated under vacuum at 120° C. for 2 hours to obtain a dehydrated product;

[0047] (2) Cool the dehydrated product to 60°C, add 60.0mL of dimethylacetamide and 10.0g of diphenylmethane diisocyanate (MDI), stir and react for 2h under argon atmosphere; add 2,2-dimethylolpropane Add 5.0 g of dibutyltin dilaurate and 0.6 g of dibutyltin dilaurate, raise the temperature to 70°C, and keep stirring for 3 hours to obtain a product containing polyurethane;

[0048] (3) Add 5.3g of magnesium acetate, 12.7g of naphthenic acid (acid value 165) and 30.0mL of dimethylacetamide to the product containing polyurethane in step (2), and stir at 140°C until 4.4g of acetic acid is collected , discharging to obtain a biodegradable polymer marine antifouling material. The marine antifouling material is painted on the epoxy fiber board, and the shallow sea hanging board test shows that no marine organisms gr...

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Abstract

The invention belongs to the technical field of marine antifouling materials and discloses a biodegradable high polymer marine antifouling material as well as preparation and application thereof. The method comprises the following steps: (1) preparing polyurethane, namely dehydrating controllable degradation polyhydric alcohols so as to obtain a dehydration product; adding a solvent and diisocyanate into the dehydration product for reacting under the inert gases and stirring conditions, adding a chain extender and a catalyst to continue reacting so as to obtain a solution containing main-chain biodegradable polyurethane; and (2) adding a metallic compound, a hydrolytic monomer and a solvent into the solution, reacting at the temperature of 80-140 DEG C, thereby obtaining the biodegradable high polymer marine antifouling material. The material disclosed by the invention has excellent surface self-updating property and mechanical property and can keep high self-updating rate under static or low-navigational speed conditions; and the material is a green and environment-friendly antifouling material and is used for preparing a marine antifouling coating. The method disclosed by the invention is simple, low in cost and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and in particular relates to a biodegradable polyurethane marine antifouling material and its preparation method and application. Background technique [0002] Marine biofouling, that is, the biological fouling formed by marine microorganisms, plants, and animals on the surface of facilities submerged in seawater, has caused great harm to the navigation industry and the exploration, development, and utilization of marine resources. For example, marine organisms attached to ships will increase the weight and roughness of the hull, resulting in a significant increase in fuel consumption and carbon dioxide emissions, which will seriously affect the maneuverability and stealth functions of warships; Biological clogging of the mesh reduces the efficiency of oxygen and nutrient exchange. The most cost-effective way to solve this problem is to apply marine antifouling paint. With ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C08G18/76C08G18/75C08G18/66C08G18/42C08G18/44C08G18/48C09D175/04C09D175/06C09D175/08C09D5/16
CPCC08G18/4018C08G18/4238C08G18/4277C08G18/428C08G18/4283C08G18/44C08G18/4833C08G18/6618C08G18/6625C08G18/664C08G18/6659C08G18/755C08G18/758C08G18/7614C08G18/7671C08G18/831C08G18/838C08G2230/00C09D5/1662C09D175/04C09D175/06C09D175/08
Inventor 张广照马春风潘健森谢庆宜
Owner SOUTH CHINA UNIV OF TECH
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