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Preparation method and application of a metal-organic gel perfused organosilicon composite material

A metal-organic and composite material technology, used in biocide-containing paints, antifouling/underwater coatings, coatings, etc. The effect of aging and increased sailing resistance

Active Publication Date: 2021-03-23
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal-organic gels are self-assembled to form a three-dimensional network structure through the coordination bonds of metal ions and organic ligands, supplemented by hydrogen bonds, π-π stacking, hydrophobic interactions, and van der Waals forces to prevent solvent molecules from Flow, so that the gel formed by the whole system has the characteristics of good thixotropy, porosity, redox, optical properties, and structural diversification. It is currently used in catalysis, drug loading, sensing, adsorption and ion There are good applications in fields such as identification, but research in the field of marine antifouling is still quite scarce

Method used

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  • Preparation method and application of a metal-organic gel perfused organosilicon composite material
  • Preparation method and application of a metal-organic gel perfused organosilicon composite material
  • Preparation method and application of a metal-organic gel perfused organosilicon composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing a metal-organic gel perfused organosilicon composite material, comprising the following steps:

[0032] (1) Preparation of porous PDMS: Take 10 parts of polydimethylsiloxane and 1 part of curing agent, mix them evenly and put them in a refrigerator at 5°C for 24 hours to eliminate the air bubbles to obtain PDMS prepolymer; take 5 parts Spread NaCl in a plastic petri dish, add the defoamed PDMS prepolymer, put it in a vacuum drying oven, pump the vacuum to make the PDMS prepolymer completely penetrate into the NaCl particles, and put it in an oven at 65°C for curing 1h, soak in ultrapure water after solidification, dissolve the salt, and finally dry the porous PDMS.

[0033] (2) Preparation of organometallic gel: Weigh 1 mmol 2-amino-5-mercapto-1,3,4-thiadiazole (AMT), dissolve it in 50 mL ultrapure water, add 2 drops of concentrated nitric acid to promote its dissolution , heat at 60°C for 3 hours to completely dissolve AMT; weigh 0.25 mmol CuI, ...

Embodiment 2

[0036] A method for preparing a metal-organic gel perfused organosilicon composite material, comprising the following steps:

[0037] (1) Preparation of porous PDMS: Take 10 parts of polydimethylsiloxane and 1 part of curing agent, mix them evenly and put them in a refrigerator at 5°C for 24 hours to eliminate the air bubbles to obtain PDMS prepolymer; take 5 parts Spread NaCl in a plastic petri dish, add the defoamed PDMS prepolymer, put it in a vacuum drying oven, pump the vacuum to make the PDMS prepolymer completely penetrate into the NaCl particles, and put it in an oven at 65°C for curing 1h, soak in ultrapure water after solidification, dissolve the salt, and finally dry the porous PDMS.

[0038] (2) Preparation of organometallic gel: Weigh 1 mmol 2-amino-5-mercapto-1,3,4-thiadiazole (AMT), dissolve it in 50 mL ultrapure water, add 2 drops of concentrated nitric acid to promote its dissolution , keep warm at 60°C for 3 hours to completely dissolve AMT; weigh 0.25mmol C...

experiment example 1

[0041] The static contact angles of the silicone elastomer smooth surface, the porous PDMS prepared in Example 1 or 2, and the antifouling coating surface prepared in Example 1 and 2 were measured with a static contact angle measuring instrument. See Table 1 for the results.

[0042] Table 1 The water static contact angle of each coating

[0043]

[0044] It can be seen from Table 1 that the smooth surface of silicone elastomer and porous PDMS itself are non-superhydrophobic surfaces, which are not conducive to inhibiting the adhesion of fouling organisms. Highly hydrophilic metal-organic gels are beneficial to inhibit the attachment of fouling organisms. The protective coating obtained in the embodiment with metal organic gel remaining on the surface has a contact angle of 0, and when the metal organic gel on the surface is scraped off, the contact angle is about 52 degrees, and the more porous PDMS has reduced by more than 50%. It shows that when the metal organic gel i...

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Abstract

The invention belongs to the field of marine organism fouling protection, and relates to a preparation method and application of an organosilicone composite material poured by metal organic gel. The preparation method comprises the following steps of: S1, preparing porous PDMS; S2, mixing AMT and CuI according to the molar ratio of 2: 1 to prepare metal organic gel Cu-AMT, adding the porous PDMS obtained in the step S1 when the metal organic gel is not completely gelatinized, and carrying out a vacuum reaction or a hydrothermal reaction for 20-30 h, with 1g of porous PMDS being added to every8-10 mL of the metal organic gel. According to the preparation method and application of the invention, a fouling treatment effect is synergistically improved by utilizing a fouling release type antifouling material and a fouling prevention type antifouling material. Meanwhile, the PDMS is non-toxic, environment-friendly and long in service life; the metal ions in the metal organic gel are less indosage and have coordination-dissociation balance, so that the release of harmful ions is reduced.

Description

technical field [0001] The invention belongs to the field of protection against marine biological fouling, and in particular relates to a preparation method and application of a metal organogel perfused organosilicon composite material. [0002] technical background [0003] Marine fouling organisms refer to the general term for animals, plants, and microorganisms attached to the bottom of ships, docks, buoys, and various artificial facilities. They attach to objects immersed in seawater such as ships, submarines, and marine engineering facilities and have adverse effects on them. The phenomenon is called biofouling. The harm caused by biofouling has seriously affected the development of the marine industry, such as increasing ship navigation resistance and fuel consumption, destroying the coating on the surface of the facility to accelerate metal corrosion and aging, increasing the frequency of ship docking repairs, blocking the pipeline of marine facilities, and increasing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/16C09D183/04
CPCC09D5/1625C09D5/1675C09D183/04C08K5/47
Inventor 刘法谦张柳钦罗舒文李秋平李华丽赵子龙李伟华
Owner SUN YAT SEN UNIV
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