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Method for preparing normal temperature-cured anti-fouling anti-drag hydrogel soft coating

A room temperature curing, soft coating technology, used in antifouling/underwater coatings, coatings, biocide-containing paints, etc. High problems, to achieve the effect of uniform distribution of cross-linking points, easy availability of raw materials and excellent mechanical properties

Inactive Publication Date: 2012-07-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, epoxy anti-corrosion paint and connecting paint are sprayed sequentially on the base, and the final topcoat is a double-coat system of silicone resin, which can greatly improve the adhesion of the coating and have an outstanding anti-fouling effect on high-speed ships. However, this silicone resin is limited to several special uses and cannot be applied on large ships. In addition, it still does not completely solve the problem of biofouling in low-speed or still seawater conditions
For organic fluorine resins, using organic fluorine resins in low surface energy antifouling coatings can reduce the adhesion and fouling of organic matter by improving the surface tension of the base material, but it is expensive, the curing temperature is high, and the coating and Poor adhesion to the substrate

Method used

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  • Method for preparing normal temperature-cured anti-fouling anti-drag hydrogel soft coating
  • Method for preparing normal temperature-cured anti-fouling anti-drag hydrogel soft coating
  • Method for preparing normal temperature-cured anti-fouling anti-drag hydrogel soft coating

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 12.5g of 2-acrylamide-2-methylpropanesulfonic acid and dissolve it in 50ml of deionized water, add it to a four-neck flask, neutralize it under ice bath conditions, and adjust the pH to about 7 with a few drops of sodium hydroxide . Then weigh 4.2 g of 2-methyl-2-acrylic acid oxirane methyl ester and dissolve it in 50 ml of deionized water with 2.0 g of polyoxyethylene sorbitan monolaurate pre-emulsified and add it to four mouth flask. Under nitrogen protection, stir well for about 30 minutes. Then add 0.3g (NH 4 ) 2 S 2 o 8 and 0.2gNa 2 SO 3, Reacted at 35°C for 7h to obtain a crude product solution. Take 2ml of the crude product, add 0.007g of curing agent diethylenetriamine, stir for about 5 minutes, and then sonicate for 1 minute to remove air bubbles, then apply the above mixture evenly on the treated glass slide at room temperature and cure for 24 hours to form a film. The obtained film is about 1.1 mm in diameter, has a tensile strength of about 1....

Embodiment 2

[0035] Weigh 12.5g of 2-acrylamide-2-methylpropanesulfonic acid and dissolve it in 50ml of deionized water, add it to a four-neck flask, neutralize it under ice bath conditions, and adjust the pH to about 7 with a few drops of sodium hydroxide . Then weigh 0.8 g of 2-methyl-2-acrylic acid oxirane methyl ester and dissolve it in 50 ml of deionized water with 1.6 g of polyoxyethylene sorbitan monolaurate pre-emulsified and add it to four mouth flask. Under nitrogen protection, stir well for about 30 minutes. Then add pre-dissolved 0.2g K 2 S 2 o 8 and 0.14gNa 2 SO 3 , Reacted at 40°C for 7h to obtain a crude product solution. Take 2ml of the crude product, add 0.005g of curing agent diethylenetriamine, stir for about 5 minutes, and then sonicate for 1 minute to remove air bubbles, then apply the above mixture evenly on the treated glass slide and cure at room temperature for 24 hours to form a film. The thickness of the obtained film is about 0.9 mm, the tensile strength...

Embodiment 3

[0037] Weigh 4.0g of 2-acrylamide-2-methylpropanesulfonic acid and dissolve it in 50ml of deionized water, add it to a four-neck flask, neutralize it under ice bath conditions, and adjust the pH to about 7 with a few drops of sodium hydroxide . 0.5 g of 1,2-epoxy-7-octene was weighed and dissolved in 50 ml of deionized water pre-added with 1.4 g of polyoxyethylene sorbitan monolaurate and pre-emulsified, and then added to the four-neck flask. Under nitrogen protection, stir well for about 30 minutes. Then add 0.035g K 2 S 2 o 8 and 0.025g Na 2 SO 3 , Reacted at 40°C for 6h to obtain a crude product solution. Take 2ml of the crude product, add 0.003g of curing agent diethylenetriamine, stir for about 5 minutes, and then sonicate for 1 minute to remove air bubbles, then apply the above mixture evenly on the treated glass slide and cure at room temperature for 24 hours to form a film. The thickness of the obtained film is about 0.7 mm, the tensile strength is about 0.6 MPa...

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Abstract

The invention discloses a method for preparing a normal temperature-cured anti-fouling anti-drag hydrogel soft coating. The method comprises the following steps of: (1) dissolving water-soluble monomers and an initiator in water; adjusting the pH value to be about 7; and pre-emulsifying functional monomers in water by using a surfactant; (2) after mixing the obtained solution, polymerizing the mixed solution at the temperature of 30 to 50 DEG C to obtain the solution of a crude product; (3) coating after mixing the obtained solution of the crude product and a curing agent, and curing at the normal temperature to obtain a soft coating film; and (4) placing the obtained soft coating film into water until swelling equilibria is achieved to obtain the anti-fouling anti-drag hydrogel soft coating with a smooth surface. The method for preparing the normal temperature-cured anti-fouling anti-drag hydrogel soft coating can be operated at the normal temperature; the process is simple and easy;raw materials are easy to obtain and have low cost; therefore, the method is suitable for industrial production. The coating has a very good application prospect in the field of preparing a ship anti-fouling anti-drag material and a biomedical coating material.

Description

technical field [0001] The invention relates to a preparation method of a hydrogel soft coating, in particular to a preparation method of an anti-fouling and drag-reducing hydrogel soft coating capable of curing at room temperature. Background technique [0002] Underwater facilities such as ships and submarines are submerged in seawater for a long time. Not only are they corroded by seawater, but the surface of the hull is also prone to adhere to marine organisms such as shells and seaweed, and is polluted by marine attachments. On the one hand, this will increase the weight and frictional resistance of the hull, and increase fuel consumption; on the other hand, it will accelerate the corrosion of the hull and shorten the service life of the hull. Therefore, it is of great significance to find a suitable way to prevent marine organisms from fouling and attaching to ships and marine structures. [0003] Research on antifouling technology generally starts from two perspectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/24C09D133/14C09D133/26C09D133/02C09D7/12C09D5/16C08F220/58C08F220/32C08F224/00C08F220/38C08F220/56C08F220/06C08F2/24
Inventor 杜淼王平郑强
Owner ZHEJIANG UNIV
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