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Organic-inorganic hybrid super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, organic technology, applied in the direction of coating, etc., can solve the problems of unmodified dispersion of nanoparticles, complicated preparation process, and difficult performance to meet the expected requirements, so as to achieve the simple and easy operation of the preparation method and overcome the preparation process The effect of complex and excellent superhydrophobic properties

Inactive Publication Date: 2015-12-16
江苏丰彩建材(集团)有限公司 +2
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of inorganic nanoparticles in superhydrophobic materials has rarely been reported.
[0004] After searching, it was found that the Chinese patent with the publication number CN101307210A reported a superhydrophobic water-based fluorosilane coating containing nanoparticles. The nanoparticles in the coating structure were not modified and dispersed, and the nanoparticles were easy to agglomerate. Poor, the coating must be added with inorganic mechano-porous carbonate compounds during the preparation process, and inorganic acid is needed to control the pH of the reaction system between 7 and 11, poor controllability
The Chinese patent with the publication number CN102120914B reports a UV-curable coating modified by fluorine-containing polymer nanoparticles. x -b-PCE(M)A y Self-assembled into PCE(M)A in a suitable solvent system y nuclear layer PFA x A micelle with a shell and UV cross-linked PCE(M)A y The chain segment is used to fix the core layer to obtain fluorine-containing polymer nanoparticles, and then disperse the fluorine-containing polymer nanoparticles in a suitable solvent system, and then add fluorine-containing acrylate monomers to obtain UV-curable matrix resin. This method The preparation process is complex and not suitable for industrial production
Publication No. CN101537682B reports a method for preparing a superhydrophobic surface by nanoparticle-assisted micromolding, which uses PDMS as a raw material to replicate the microstructure of the surface of fresh lotus leaves as a soft template, and then combines the modified nanoparticles with polymer Pouring or hot pressing onto the surface of the PDMS soft template, peeling off after molding to obtain a polymer surface with a micro-nano second-order structure and super-hydrophobic properties, but in this method, the PDMS soft template shrinks and deforms after curing, and PDMS itself is elastic. and thermal expansion, it is difficult to obtain high accuracy, and in this method, nanoparticles and polymers are simply blended, and the performance is difficult to meet the expected requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Inorganic Nanoparticles: Ti(OBu) 4 , ethanol and distilled water were mixed at room temperature according to the volume ratio of 1:1:2, after mixing, the temperature was raised to 60°C, stirred for 1 hour, then hydrochloric acid was added to the mixed solution to adjust its pH to 2, continued to stir for 1 hour, left to stand for 24 hours, and dried by centrifugation Obtain nano-TiO with a diameter of 10-300nm 2 .

[0035] Modification of inorganic nanoparticles: the prepared nano-TiO 2 Add in ethanol, ultrasonically disperse for 30 minutes to form a suspension; dissolve vinyltriethoxysilane in ethanol to make vinyltriethoxysilanol solution; mix the suspension with vinyltriethoxysilanol solution , stirred at a high speed of 500r / min for 1h, filtered, washed, and dried to obtain modified nano-TiO 2 . Nano-TiO 2 The mass ratio to vinyltriethoxysilane is 1:1.

[0036] Grafting of inorganic nanoparticles: the modified nano-TiO 2 , benzoyl peroxide and ...

Embodiment 2

[0039] Preparation of inorganic nanoparticles: Si(OC 2 h 5 ) 4 , methanol and distilled water were mixed at room temperature according to the volume ratio of 1:2:3. After mixing, the temperature was raised to 40°C, and stirred for 0.5h. Then, oxalic acid was added to the mixed solution to adjust its pH to 3. Stirring was continued for 0.5h, and it was left to stand for 24h. Centrifugal drying to obtain nano-SiO with a diameter of 10-300nm 2 .

[0040] Modification of inorganic nanoparticles: the prepared nano-SiO 2 Add methanol and ultrasonically disperse for 10 minutes to form a suspension; dissolve vinyltrimethoxysilane in methanol to make a vinyltrimethoxysilane solution; mix the suspension with the vinyltrimethoxysilane solution at 800r / min Stir at high speed for 1h at a rotating speed, filter, wash, and dry to obtain modified nano-SiO 2 . Nano-SiO 2 The mass ratio to vinyltrimethoxysilane is 1.5:1.

[0041] Grafting of inorganic nanoparticles: the modification of ...

Embodiment 3

[0044] Preparation of inorganic nanoparticles: Al(C 3 h 7 O) 3 , glycerol and distilled water were mixed at room temperature according to the volume ratio of 1:3:4. After mixing, the temperature was raised to 50°C and stirred for 2 hours. Then, ammonia water was added to the mixed solution to adjust its pH to 4. Continue to stir for 2 hours, and then it was left to stand for 24 hours and centrifuged. Dry to obtain nano-Al with a diameter of 10-300nm 2 o 3 .

[0045] Modification of inorganic nanoparticles: the prepared nano-Al 2 o 3 Add in glycerol, ultrasonically disperse for 50 minutes to form a suspension; dissolve vinyl tris(β-methoxyethoxy)silane in glycerol to make vinyl tris(β-methoxyethoxy)silane solution; after mixing the suspension with vinyl tris(β-methoxyethoxy)silane solution, stirring at a high speed of 1100r / min for 3h, filtering, washing and drying to obtain modified nano-Al 2 o 3 . Among them, nano-Al 2 o 3 The mass ratio to vinyl tris(β-methoxyetho...

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Abstract

The invention relates to an organic-inorganic hybrid super-hydrophobic coating. The coating is prepared by mixing a granule-polymer grafted hybrid with a solvent, then forming a film by coating and drying the film, wherein the granule-polymer grafted hybrid is a copolymer prepared by grafting after mixing modified inorganic nanoparticles with an organic polymer in a mass ratio of 1 to (1-4). The drop contact angle of the super-hydrophobic coating does not exceed 160 degrees and the angle of slide is 2+ / -2 degrees. The super-hydrophobic coating not only has excellent super-hydrophobicity but also has the special properties, such as freedom from dust and self-cleaning. Meanwhile, the coating prepared by grafting the polymer after modification of the inorganic nanoparticles is more uniform and dispersive and has better coating effects. A preparation method is simple, is easy to operate and is suitable for industrial production.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid super-hydrophobic coating and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] In recent years, the phenomenon of superhydrophobicity on the surface of plant leaves has attracted extensive attention. The so-called superhydrophobicity of plants means that the leaves of plants have significant functions such as hydrophobicity, desorption, anti-sticking, and self-cleaning. With the development of science and technology, the design and application of various hydrophobic surfaces has become one of the hot issues in materials research. Superhydrophobic surfaces have attracted more attention due to their unique self-cleaning properties and good biocompatibility. Due to the unique surface properties of superhydrophobic materials, it can be widely used in waterproof, antifouling, self-cleaning, fluid drag reduction and antibacterial fields, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/10C08F292/00
Inventor 沈志明李娟李晴陈中成维川杨丹萍李安宁杨亚萍
Owner 江苏丰彩建材(集团)有限公司
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