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Epoxy/ SiO2 nano composite coating and preparation method and use method thereof

A nano-composite and coating technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems of low surface energy of epoxy coatings, low surface energy, and the inability to prepare strong hydrophobic coatings, etc., to achieve low cost and equipment Simple, simple effect

Inactive Publication Date: 2009-10-21
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the defect that strong hydrophobic coatings cannot be prepared with fluorine-containing substances in the current technology, and we have prepared a low surface energy epoxy / SiO 2 Nano-composite coatings, this technology applies the theory of hydrophobicity to epoxy coatings, uses the characteristics of the fluorine-containing segment to migrate to the surface at a selected temperature, endows the epoxy coating with low surface energy, and adds SiO 2 Nanoparticles, thus constructing a microstructure with a certain roughness on the surface of the epoxy coating

Method used

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  • Epoxy/ SiO2 nano composite coating and preparation method and use method thereof
  • Epoxy/ SiO2 nano composite coating and preparation method and use method thereof
  • Epoxy/ SiO2 nano composite coating and preparation method and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation and characterization of fluorine-containing acrylate-methyl methacrylate-styrene copolymer:

[0035] Add 0.25 grams of sodium dodecyl sulfate (SDS), 0.25 grams of nonylphenol polyoxyethylene ether (OP-10), 0.9 grams of tetrafluoropropanol, 0.4 grams of n-butanol, 4.0 gram of perfluoroalkyl ethyl acrylate (FA), 2.4 grams of methyl methacrylate (MMA), 2.4 grams of styrene (St), 43 grams of distilled water, pre-emulsified at 40°C at a stirring speed of 3000 rpm After 30 minutes, the pre-emulsion was obtained, and then 2 / 3 of the pre-emulsion was poured into the constant pressure dropping funnel. Fill the system with nitrogen and oxygen for 30 minutes (the following reaction process is kept under nitrogen atmosphere), the system is heated to 80 ° C, and 0.06 grams of potassium persulfate (KPS) and 0.03 grams of sodium bisulfite (NaHSO 3), reacted for 1.5 hours, then added dropwise the mixed solution in the constant pressure dropping funnel to the four-neck f...

Embodiment 2

[0061] (1) Weigh 0.05 grams of perfluoroalkyl ethyl acrylate-methyl methacrylate-styrene copolymer (same as Example 1), 1.0 grams of E51 (same as Example 1) into Reactor 1, Add mixed solvent 1 (with embodiment 1) 0.8 gram in device 1, stir and make mixture dissolve completely, obtain first component;

[0062] (2) Weigh 0.9 grams of curing agent TMEG in reactor 2, add 0.8 grams of mixed solvent 2 (same as in Example 1) to reactor 2, and stir until curing agent TMEG is completely dissolved to obtain component B;

[0063] (3) at last all the first and second components of the gained are mixed homogeneously to obtain the modified epoxy coating;

[0064] Application method: (with embodiment 1);

[0065] The obtained modified epoxy coating is 120° to the water contact angle, and the hydrophobicity of the epoxy coating is improved to a certain extent;

[0066] Analysis: The difference between embodiment 2 and embodiment 1 is that embodiment 1 has added SiO with an average particle ...

Embodiment 3

[0068] (1) Weigh 0.05 grams of perfluoroalkyl ethyl acrylate-methyl methacrylate-styrene copolymer (with embodiment 1), and the average particle diameter is 40 nanometers of SiO 2 0.10 gram, E51 1.0 gram in reactor 1, add mixed solvent 1 (with embodiment 1) 0.8 gram in reactor 1, stir, make mixture dissolve completely, obtain first component;

[0069] (2) Weigh 0.9 grams of modified amine curing agent T31 in glass vessel 2, add 0.8 grams of mixed solvent 2 (same as Example 1) to glass vessel 2, and stir with a glass rod until the curing agent TMEG is completely dissolved to obtain B component;

[0070] (3) at last all the first and second components of the gained are mixed homogeneously to obtain the modified epoxy coating;

[0071] Application method: Mix all components A and B obtained above evenly, apply on the surface of the object, and place it at room temperature for curing;

[0072] The obtained modified epoxy coating has a water contact angle of 105°, and the epoxy ...

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Abstract

The invention relates to an epoxy / SiO2 nano composite coating and a preparation method and a use method thereof. The coating is formed by mixing an A composition and a B composition, wherein the A composition comprises a fluoroacylate copolymer, nano SiO2, epoxy resin and a mixed solvent 1, and the B composition comprises a curing agent and a mixed solvent 2. The preparation method comprises the following steps: (1) adding fluoroacylate copolymer, the nano SiO2 and the epoxy resin into a reactor 1 in turn according to the material ratio, and adding the mixed solvent 1 into the reactor for stirring to obtain the A composition; (2) adding the curing agent into a reactor 2, and adding the mixed solvent 2 into the reactor for stirring to obtain the B composition; and (3) uniformly mixing the A composition and the B composition, and finally obtaining the modified epoxy coating. The composite coating guarantees that the structured epoxy coating has a microcosmic coarse structure, makes a contact angle of the epoxy coating with water reach approximately 140 DEG, prolongs the service life of the epoxy coating, and has good industrial application value.

Description

technical field [0001] The invention belongs to the field of epoxy coatings, in particular to an epoxy / SiO 2 Nanocomposite coatings and methods of making and using same. technical background [0002] Wettability is an important characteristic of solid surfaces and has a wide range of applications in production and life. In the past decade, interfacial materials with special wettability and their special functions have attracted great attention, which has promoted the research of superwettability and its surface materials. In the 1930s and 1940s, Wenzel and Cassie successively studied the influence of surface roughness on wettability, and gave the Wenzel formula and Cassie-Baxter formula. These two formulas have become the basis for scholars to explore the contact angle models of surfaces with different roughness or microstructure, and also make people realize that the wettability of a solid surface is determined by its chemical composition and microscopic geometric structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D133/16C09D7/12
Inventor 王月欣李景红王善兴张倩郝文鶥黄婷
Owner HEBEI UNIV OF TECH
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