Magnetic hydrophobic self-cleaning paint and preparation method thereof

A coating and hydrophobic technology, which is applied in the field of nano-materials, can solve problems such as inapplicability to steel surfaces, and achieve the effects of good coating contact angle, strong adhesion, and easy construction

Active Publication Date: 2014-04-09
SHANGHAI JIAO TONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After searching the existing technology, it was found that Chinese Patent Document No. CN101734945A, with a publication date of 2010-06-16, discloses a permeable silicone nano-waterproof and protective agent and its preparation method. This technology propo

Method used

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  • Magnetic hydrophobic self-cleaning paint and preparation method thereof
  • Magnetic hydrophobic self-cleaning paint and preparation method thereof
  • Magnetic hydrophobic self-cleaning paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare the magnetic hydrophobic self-cleaning coating of the present invention according to the following proportions, in terms of weight fraction: 10 parts of isooctyltriethoxysilane, Fe modified by dendrimers 3 o 4 0.1 parts of magnetic nanoparticles, 89.9 parts of absolute ethanol.

[0029] The preparation process is as follows:

[0030] Preparation of Fe3O4 magnetic nanoparticles by co-precipitation method; Fe 2+ with Fe 3+ The ions were mixed according to the ratio of 1:2, and then under the protection of nitrogen, a NaOH solution with a concentration of 4M was added, and the reaction was carried out at 80°C for 60min to obtain Fe 3 o 4 Magnetic nanoparticles were washed three times with ultrapure water and absolute ethanol, and set aside.

[0031] Aminosilane modified Fe 3 o 4 Magnetic nanoparticles: 5% Fe 3 o 4 Magnetic nanoparticles were dissolved in a certain amount of ethanol solution, ultrasonically mixed for 30 minutes to make it evenly mixed, then...

Embodiment 2

[0037] Prepare the magnetic hydrophobic self-cleaning coating of the present invention according to the following proportions, in terms of weight fraction: 25 parts of isooctyltriethoxysilane, Fe modified by dendrimers 3 o 4 0.25 parts of magnetic nanoparticles, 74.75 parts of absolute ethanol.

[0038] The preparation process is as follows:

[0039] Preparation of Fe by co-precipitation method 3 o 4 Magnetic nanoparticles; Fe 2+ with Fe 3+ The ions were mixed according to the ratio of 1:2, and then under the protection of nitrogen, a NaOH solution with a concentration of 4M was added, and the reaction was carried out at 80°C for 60min to obtain Fe 3 o 4 Magnetic nanoparticles were washed three times with ultrapure water and absolute ethanol, and set aside.

[0040] Aminosilane modified Fe 3 o 4 Magnetic nanoparticles: 5% Fe 3 o 4 Magnetic nanoparticles were dissolved in a certain amount of ethanol solution, ultrasonically mixed for 30 minutes to make it evenly mixe...

Embodiment 3

[0046] Prepare the magnetic hydrophobic self-cleaning coating of the present invention according to the following proportions, in terms of weight fraction: 50 parts of isobutyltriethoxysilane, Fe modified by dendrimers 3 o 4 0.5 parts of magnetic nanoparticles, 49.5 parts of absolute ethanol.

[0047] The preparation process is as follows:

[0048] Preparation of Fe by co-precipitation method 3 o 4 Magnetic nanoparticles; Fe 2+ with Fe 3+ The ions were mixed according to the ratio of 1:2, and then under the protection of nitrogen, a NaOH solution with a concentration of 4M was added, and the reaction was carried out at 80°C for 60min to obtain Fe 3 o 4 Magnetic nanoparticles were washed three times with ultrapure water and absolute ethanol, and set aside.

[0049] Aminosilane modified Fe 3 o 4 Magnetic nanoparticles: 5% Fe 3 o 4 Magnetic nanoparticles were dissolved in a certain amount of ethanol solution, ultrasonically mixed for 30 minutes to make it evenly mixed,...

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Abstract

A magnetic hydrophobic self-cleaning paint and a preparation method thereof belong to the technical field of nano-material technology. The paint comprises alkyl alkoxy silane, Fe3O4 magnetic nanoparticles and an organic solvent. The Fe3O4 magnetic nanoparticles are modified by the dendritic macromolecules. Based on the '' lotus effect '', the invention employs alkyl alkoxy silane as a low surface energy substance, which is added with dendritic macromolecule modified Fe3O4 magnetic nanoparticles as a filler for a rough surface structure of the coating, so as to prepare a hydrophobic self-cleaning coating. The magnetism of Fe3O4 nanoparticles can reinforce adhesion of the coating on a ferromagnetic steel surface.

Description

technical field [0001] The invention relates to a method in the technical field of nanometer materials, in particular to a magnetic hydrophobic self-cleaning coating suitable for the surface of various substrates, especially for the surface of steel with ferromagnetism, and a preparation method thereof. Background technique [0002] With the continuous progress of urbanization and people's continuous pursuit of environmental sanitation, self-cleaning coatings for various stone and steel surfaces have received more and more attention. The use of self-cleaning coatings can not only give the city a new look, but also reduce the cost of cleaning and maintenance of urban buildings and save money. [0003] According to bionic research reports, the surface structure of lotus leaf has the function of hydrophobic self-cleaning. The reason for this is that the surface of the lotus leaf is distributed with countless micro-nano binary roughness waxy papillae structures, which makes the...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/23C09D5/16C09D7/12C09C1/24C09C3/12C09C3/10
Inventor 崔大祥蔡宁李耀霞焦金红张杰黄东曹海顺
Owner SHANGHAI JIAO TONG UNIV
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