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Method for preparing super-hydrophobicity surfaces

A superhydrophobic, deionized water technology, applied in the field of preparation of superhydrophobic surfaces, can solve the problems of cumbersome process and products without hydrophobic properties.

Inactive Publication Date: 2013-01-09
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of hollow microspheres by the template method requires the preparation and removal of the template, the process is cumbersome, and the resulting product does not have hydrophobic properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Prepare 1.2 grams of a mixture of 3-aminopropyltrimethoxysilane and ethyl orthosilicate with a molar ratio of 4:1, stir to mix evenly; drop into 8mL of deionized water, and stir at a rate of 200rpm The mixed solution was stirred at 20° C. for 4 hours, the mixed solution was allowed to stand for 10 hours, filtered to obtain a precipitate, and washed three times with deionized water.

[0018] (2) Mix 20mL of absolute ethanol and 1mL of ethyl acetoacetate, then add 2mL of tetrabutyl titanate into the mixed solution, and stir for 1 hour. Within 30 minutes, 1 mL of deionized water was added to the mixed solution, stirred at a rate of 600 rpm for 10 hours, and left to stand for 24 hours to obtain a yellow sol. Centrifuge three times with absolute ethanol, dry at 50° C. for 12 hours, and grind to obtain titanium dioxide nanoparticles. Take 1.0 g of the prepared titanium dioxide nanoparticles, disperse in 50 mL of 3% γ-glycidyl etheroxypropyl trimethoxysilane ethanol solut...

Embodiment 2

[0022] (1) Prepare 2.2 grams of a mixture of 3-aminopropyltrimethoxysilane and ethyl orthosilicate with a molar ratio of 3:1, stir to mix evenly; drop into 14mL of deionized water, and stir at a rate of 200rpm The mixed solution was stirred at 20° C. for 5 hours, the mixed solution was allowed to stand for 10 hours, and the precipitate was obtained by filtration, which was washed three times with deionized water.

[0023] (2) Mix 14mL of absolute ethanol and 7mL of glacial acetic acid, then add 1mL of tetrabutyl titanate into the mixed solution, and stir for 1 hour. Within 30 minutes, 3 mL of deionized water was added to the mixed solution, stirred at a rate of 600 rpm for 10 hours, and left to stand for 24 hours to obtain a yellow sol. Centrifuge three times with absolute ethanol, dry at 50° C. for 12 hours, and grind to obtain titanium dioxide nanoparticles. Take 1.0 g of prepared titanium dioxide particles, disperse in 50 mL of 3% γ-glycidyl etheroxypropyl trimethoxysilane...

Embodiment 3

[0027] (1) Prepare 1.5 grams of a mixture of N-β(aminoethyl)-γ-aminopropylmethyldimethoxysilane and ethyl orthosilicate with a molar ratio of 5:1, stir to mix evenly; drop by drop Drop into 10 mL of deionized water, stir the mixed solution at a rate of 200 rpm, and stir at 30° C. for 4 hours. The mixed solution was left to stand for 10 hours, filtered to obtain a precipitate, and washed three times with deionized water.

[0028] (2) Mix 20mL of absolute ethanol and 1mL of acetylacetone, then add 3mL of tetrabutyl titanate into the mixed solution, and stir for 1 hour. Within 30 minutes, 1 mL of deionized water was added to the mixed solution, stirred at a rate of 600 rpm for 10 hours, and left to stand for 24 hours to obtain a yellow sol. Centrifuge three times with absolute ethanol, dry at 50° C. for 12 hours, and grind to obtain titanium dioxide nanoparticles. Take 1.0 g of the prepared titanium dioxide nanoparticles, disperse them in 50 mL of 5% γ-glycidoxypropyltrimethoxys...

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Abstract

The invention discloses a method for preparing super-hydrophobicity surfaces. A silane coupling agent containing reactivity amino serves as a catalyst to prepare amino modified hollow silica nanometer microspheres; the amino modified hollow silica nanometer microspheres are reacted with epoxy group modified titanium dioxide nano particles to form nano composite particles in raspberry-shaped structures; and the nano composite particles in raspberry-shaped structures are modified through long-carbon-chain fluorine-containing substances to prepare the super-hydrophobicity surfaces. The method for preparing super-hydrophobicity surfaces is characterized in that templates are not needed in the preparing process of the amino modified hollow silica nanometer microspheres; and the chemical bonding reaction between the amino modified hollow silica nanometer microspheres and the epoxy group modified titanium dioxide nano particles is used for preparing the nano composite particles in raspberry-shaped structures. The super-hydrophobicity surfaces are hopeful for being applied to heavy metal ion absorption and separation, harmful gas absorption and decomposing and micro-carrier aspects in relevant separation processes.

Description

[0001] technical field [0002] The invention relates to a method for preparing a superhydrophobic surface. Background technique [0003] Wettability is one of the important properties of solid surfaces. The so-called superhydrophobic surface generally refers to the surface with a contact angle with water greater than 150° and a rolling angle less than 10°. One of the prerequisites for preparing a superhydrophobic surface is to construct a rough surface. The raspberry-like structure nanocomposite particle is a kind of core-shell structure nanocomposite particle similar to raspberry in appearance. The use of chemical covalent bonds between different functional groups to construct raspberry-like structures is a method for preparing raspberry-like nanocomposite particles, because the raspberry-like nanocomposite particles prepared by this method are affected by the environmental pH value and solvent The effect is small, therefore, this method is widely used. Due to the part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00
Inventor 刘伟良柏冲徐文华姚金水刘金秋赵利
Owner QILU UNIV OF TECH
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