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Photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating and preparation method thereof

A marine antifouling and self-cleaning technology, applied in antifouling/underwater coatings, coatings, biocide-containing paints, etc.

Active Publication Date: 2017-03-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a photocatalytic self-cleaning amphiphilic network marine antifouling coating and its preparation method, to overcome the defects of existing coatings that use a large number of toxic antifouling agents

Method used

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  • Photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating and preparation method thereof
  • Photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] A method for preparing a photocatalytic self-cleaning amphiphilic network marine antifouling coating, the specific steps are:

[0087] 1. Preparation of amphiphilic tri-block copolymers by ATRP (atom transfer radical polymerization) method:

[0088] (1) Preparation of PDMS-based macromolecular initiator:

[0089] Dissolve 10 parts of polydimethylsiloxane (here hydroxypolydimethylsiloxane) (company Gelest, type DMS-C21) (Mn=4000g / mol) in 80 parts of tetrahydrofuran to obtain functionalized Polydimethylsiloxane solution, add 0.5 parts of triethylamine, slowly drop 0.5 parts of 2-bromoisobutyryl bromide, react in an ice-water bath at -10°C for 3 hours, remove the precipitate by suction filtration after the reaction, The solvent was removed by rotary evaporation, then dissolved in n-hexane, washed and purified with deionized water three times, and dried in an oven for 24 hours to obtain a bromine-terminated PDMS-based macroinitiator.

[0090] (2) Preparation of PDMS-based...

Embodiment 2

[0104] Similar to Example 1, the difference is:

[0105] The preparation of step 6, photocatalytic self-cleaning amphiphilic network marine antifouling coating is as follows:

[0106] The obtained MPTS modified nano-titanium dioxide hybrid amphiphilic copolymer network coating is placed in a toluene solution of 0.1% trimesoyl chloride to react for 10 minutes, and after the reaction, the coating is taken out and placed in a concentration of 0.8%. Lysine-TiO 2 React in the dispersion liquid (the solvent is toluene) for 20 minutes, take it out, and obtain the photocatalytic self-cleaning amphiphilic network marine antifouling coating.

[0107] The original contact angle of the prepared marine antifouling coating is 100°, and the contact angle is reduced to 35° after 7 days of sunlight exposure, the breaking strength is 4.5MPa, the swelling rate in water is 2.5%, and the BSA adsorption capacity is 40ug / cm 2 , compared to glass sheets, can be reduced by 80%, and the adhesion of d...

Embodiment 3

[0109] Similar to Example 1, the difference is:

[0110] The preparation of step 6, photocatalytic self-cleaning amphiphilic network marine antifouling coating is as follows:

[0111] The obtained MPTS modified nano-titanium dioxide hybrid amphiphilic copolymer network coating is placed in a toluene solution of 0.3% trimesoyl chloride to react for 10 minutes, and after the reaction, the coating is taken out and placed in a concentration of 0.2%. Lysine-TiO 2 React in the dispersion liquid (the solvent is toluene) for 20 minutes, take it out, and obtain the photocatalytic self-cleaning amphiphilic network marine antifouling coating. The original contact angle of the prepared marine antifouling coating was 105°, and the contact angle decreased to 38° after 7 days of sunlight exposure, the breaking strength was 4.8MPa, the swelling rate in water was 2.3%, and the BSA adsorption capacity was 43ug / cm 2 , compared with the glass sheet, it can be reduced by 76%, and the adhesion am...

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Abstract

The invention provides a preparation method of a photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating. The preparation method is characterized by comprising the following steps: preparing an amphiphilic triblock copolymer according to an ATRP (atom-transfer radical-polymerization) method; modifying the obtained amphiphilic triblock copolymer by using an acyl halide monomer so as to obtain an amphiphilic block copolymer with unsaturated double bonds; performing ultraviolet irradiation on the amphiphilic block copolymer with unsaturated double bonds, a cross-linking agent and MPTS (methacryloxy propyl trimethoxy silane) modified nano titanium dioxide to implement a curing cross-linking reaction, so as to obtain an MPTS modified nano titanium dioxide hybridized amphiphilic copolymer network coating; sequentially putting the obtained MPTS modified nano titanium dioxide hybridized amphiphilic copolymer network coating into a trimesoyl chloride solution and a dispersing liquid of amino acid amphiphilic ion modified titanium dioxide nanoparticles, implementing reactions, and taking out, so as to obtain the photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating. The photocatalysis self-cleaned amphiphilic network ocean anti-flouring coating can be applied to aspects such as ship coating and long-term anti-flouring of underwater equipment. The invention further discloses a method for preparing an amphiphilic copolymer network.

Description

technical field [0001] The invention belongs to the field of marine antifouling polymer materials, and in particular relates to a method for preparing an antifouling coating aimed at modifying the surface of an amphiphilic network, which can be used to form a high-strength, firmly bonded, environmentally friendly and super-strong antifouling coating on the surface of ships and the like. Composite antifouling coating based on double modified nano-TiO2 for antifouling cycle. Background technique [0002] Marine biofouling has always been a major problem restricting the development and utilization of marine resources due to the increase in ship navigation resistance and fuel consumption, accelerated hull corrosion and repair costs, biological invasion and epidemic spread, and harm to aquaculture. Using antifouling coatings, ocean shipping could reduce fuel consumption worth $60 billion and reduce greenhouse gas emissions by 3.6 million tons per year. As an important way to sol...

Claims

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Application Information

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IPC IPC(8): C09D153/00C09D7/12C08F293/00C08F8/14C08K9/06C08K9/04C08K3/22C09D5/16
CPCC08F8/14C08F293/005C08F2438/01C08K3/22C08K9/04C08K9/06C08K2003/2241C08K2201/011C09D5/1662C09D5/1687C09D7/62C09D153/005
Inventor 何春菊王海晔
Owner DONGHUA UNIV
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