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A kind of hydrogel that can be used for marine antifouling and its preparation method and application

A hydrogel, hydrophilic technology, applied in antifouling/underwater coatings, biocide-containing paints, coatings, etc., can solve the problems of reduced mechanical properties, impact, and hydrogen bonds cannot be restored to the original.

Active Publication Date: 2020-10-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still key challenges in the practical application of hydrogels. For example, swelling and irrecoverable water loss will lead to a sharp decrease in its mechanical properties, and on the other hand, it will affect its bond strength and limit the application of hydrogel coatings. In the actual application environment, in addition, its irrecoverable loss of water greatly weakens its original characteristics and makes it impossible to reuse, such as the strong swelling performance of acrylic acid and clay hydrogel, and the formation of molecules after water loss in gels such as PVA Intra-molecular hydrogen bonds cannot be restored to the original intermolecular hydrogen bonds, etc.

Method used

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  • A kind of hydrogel that can be used for marine antifouling and its preparation method and application
  • A kind of hydrogel that can be used for marine antifouling and its preparation method and application
  • A kind of hydrogel that can be used for marine antifouling and its preparation method and application

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preparation example Construction

[0067] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0068] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0069] In the present invention, the rehydratable property refers to that the hydrogel can quickly absorb water and reach its original state without swelling after dehydration.

[0070] In the present invention, the mechanical stability refers to t...

preparation example 1

[0073] Add 100ml of ethyl acetate to a 250ml round-bottomed flask with a magnet, then add 1,3-propane sultone (0.1mol), then dimethylaminoethyl methacrylate ( DMAEMA) (0.1 mol) was added dropwise to the solution. After 24 hours, the reaction was stopped and vacuum filtration was performed. Subsequently, it was washed three times with ethyl acetate and dried under vacuum to obtain a white powder product, which was confirmed by NMR.

[0074] figure 1 For the nuclear magnetic spectrum of the zwitterionic compound 3-(2-methacryloyloxyethyl dimethylamino)propanesulfonate (DMAPS) prepared in Preparation Example 1, it can be seen from the figure that each hydrogen of DMAPS Assignment: 1.80(s,3H,bH), 2.13(m,2H,gH), 3.21(s,6H,eH), 2.88, 3.79, 3.61(dH,fH,hH), 4.5(d,2H,cH) , 6.22 (s, 1H, aH), 5.76 (d, 1H, aH), 4.7 (solvent, D2O peak), indicating that the prepared product is 3-(2-methacryloyloxyethyl dimethylamino) propanesulfonate (DMAPS).

Embodiment 1

[0075] Embodiment 1: Preparation of PHEM-5%D hydrogel:

[0076] Weigh 4g of hydroxyethyl methacrylate (HEMA) into a beaker, then add 0.5g of methacrylic acid (MMA), then pour 5mL of deionized water, then add 0.5g of 3-(2-methacryloyloxy Ethyldimethylamino)propanesulfonate (DMAPS), then 100mg of polyethylene glycol dimethacrylate (PEGDMA) was added as a cross-linking agent and 20mg of 2,2-diethoxyacetophenone ( DEOP) as an initiator, stirred evenly, ultrasonically removed air bubbles, then poured into a PTFE mold, placed in a 365nm ultraviolet light source and irradiated for 600s to obtain a PHEM-5%D hydrogel sample with a thickness of 1mm and a length and width of 5*5cm.

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Abstract

The present invention provides a hydrogel capable of being used for marine antifouling, a preparation method and uses thereof. According to the present invention, the hydrogel does not swell while other gels such as acrylic acid, clay, acrylamide and the like swell heavily; the hydrogel can completely restore to the original state after water loss while other hydrogels such as a PVA gel cannot berecovered; the compression resistance of the gel of the present invention can remain unchanged after dehydration-rehydration circulation, the gel of the present invention has good stability under different shear frequencies at different temperatures, and the hydrogel is transparent while other oil hydrogels are less transparent; and the gel of the present invention has excellent biofouling performance.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling, and in particular relates to a rehydratable, anti-swelling, mechanically stable and transparent hydrogel which can be used for marine antifouling and its preparation method and application. Background technique [0002] Marine biofouling refers to the process in which about 4,000 kinds of microorganisms in the ocean adhere and accumulate on the surface of marine hulls and other equipment used for marine operations. This phenomenon will cause serious harm, such as increasing the weight of the hull and increasing the surface area. Roughness reduces the speed of navigation and increases the amount of fuel; in addition, fouling organisms will penetrate the coating on the surface of the equipment to further accelerate its corrosion and aging; fouling organisms migrate with the ship's navigation and reproduce in different sea areas, resulting in ecological system disorder. Traditional marin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/20C08F220/06C08F220/38C08F222/20C08J3/075C09D133/14C09D5/16
CPCC08F220/20C09D5/1662C09D133/14
Inventor 郭兴林苏鑫郝德昭
Owner INST OF CHEM CHINESE ACAD OF SCI
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