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Biodegradable high polymer marine antifouling material as well as preparation and application thereof

A marine antifouling and biodegradable technology, applied in antifouling/underwater coatings, biocide-containing paints, polyurea/polyurethane coatings, etc., can solve marine microplastic pollution and other problems, achieve good mechanical properties and avoid pollution Problems, effects of broad application prospects

Active Publication Date: 2017-09-15
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 polymethyl ethylene carbonate with a molecular weight of 2000 g / mol was vacuum-dried at 120°C for 2 hours to obtain a dehydrated product;

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

[0040] (3) Add 1.4 g of magnesium hydroxide, 6.8 g of stearic acid and 10 mL of xylene to the product containing polyurethane in step (2), stir at 100°C until 0.8 g of water is collected, and then discharge to obtain a biodegradable type Macromolecule marine antifouling material. The marine antifouling material was painted on a steel plate pre-coated with epoxy anticorrosive primer. The shallow sea hanging board experiment showed that no marine organisms ...

Embodiment 2

[0042] (1) 50.0g of poly(caprolactone-lactide) with a molecular weight of 2000g / mol was vacuum-removed at 120°C for 2h 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 under nitrogen protection for 1 h; then add 1.6 g of 1,4 butanediol, 2 , 3.2g of 2-dimethylolpropionic acid and 0.2g of dibutyltin dilaurate, continue to stir and react for 3 hours at 70°C 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 type Macromolecule marine antifouling material. The marine antifouling material was painted on the epoxy fiber board, and the shallow sea hanging board experiment showed that there was no growth of marine organisms for 8 months.

Embodiment 3

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

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

[0048] (3) Add 5.3 g of magnesium acetate, 12.7 g of naphthenic acid (acid value 165) and 30.0 mL of dimethylacetamide to the product containing polyurethane in step (2), and stir at 140°C until 4.4 g of acetic acid are collected. , The material is discharged, and the biodegradable polymer marine antifouling material is obtained. The marine antifouling material was painted on the epoxy fiber board, and the shallow sea hanging board experiment showed that there was no growth of marine organisms for 6 months.

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PUM

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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 specifically relates to a biodegradable polyurethane marine antifouling material and a preparation method and application thereof. Background technique [0002] Marine biological fouling, that is, biological fouling caused by the attachment and reproduction of marine microorganisms, plants, and animals on the surface of facilities immersed in seawater, causing 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 seriously affects the maneuverability and stealth function of warships; attaching breeding sea cages to marine aquaculture cages Organisms block the mesh and reduce the exchange efficiency of oxygen and nutrients. The most e...

Claims

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Application Information

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Patent Type & Authority Applications(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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