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Modified inorganic particle, preparation method thereof and application of modified inorganic particle in super-hydrophobic material

An inorganic particle and modification technology, applied in the field of coatings, can solve the problems of many preparation steps, unfriendly environment, cumbersome process, etc., and achieve the effect of good biocompatibility and environmental friendliness

Active Publication Date: 2022-05-13
INST OF CHEM ENG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the hydrophobic modification of inorganic nanoparticles is mainly obtained through the covalent bonding of organic fluorine compounds and inorganic particles. Although organic fluorine compounds can be modified to obtain superhydrophobic materials, organofluorine compounds are usually non-degradable, and It has an enrichment effect in the natural ecological cycle and is harmful to the environment and human health. Therefore, it is urgent to find an environmentally friendly and biodegradable hydrophobic modified inorganic particle for use in coatings.
[0003] In addition, in addition to the super-hydrophobic properties of the coating, antibacterial properties are also the focus of attention. The antibacterial function is mainly achieved by adding substances with antibacterial effects to the coating system, such as adding copper ions, silver ions or using organic quaternary ammonium salts. Modification of inorganic nanoparticles, but metal ions are harmful to the ecological environment and human health, while organic quaternary ammonium salts are amphiphilic substances, with many preparation steps, cumbersome and complicated processes, the use of organic solvents, and high costs. Quaternary ammonium salts are easy to migrate in the coating, which affects the superhydrophobic effect
To sum up, the preparation of coatings with both superhydrophobic and antibacterial properties in the prior art requires the use of organic fluorine compounds, metal ions or organic quaternary ammonium salts, which are unfriendly to the environment, non-degradable, and harmful to the human body. Therefore, it is urgent Need to develop an environmentally friendly, biodegradable, biocompatible superhydrophobic antibacterial coating

Method used

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  • Modified inorganic particle, preparation method thereof and application of modified inorganic particle in super-hydrophobic material
  • Modified inorganic particle, preparation method thereof and application of modified inorganic particle in super-hydrophobic material
  • Modified inorganic particle, preparation method thereof and application of modified inorganic particle in super-hydrophobic material

Examples

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Effect test

Embodiment 1

[0057] A modified Al 2 o 3 Particles, rosin modified nano-Al 2 o 3 .

[0058] The above modified Al 2 o 3 The preparation method of particle, comprises the steps:

[0059] Adopt toluene as organic solvent, configuration mass fraction is 3% rosin solution, then get 0.5 part of rosin solution and add 0.5 part of nanometer Al 2 o 3 (average particle size 13nm) and 0.02 parts of DCC and 0.02 parts of DMAP were esterified at 100°C for 12 hours, filtered and washed several times with ethanol, and dried to constant weight.

[0060] A preparation method of a bio-based antibacterial superhydrophobic coating, comprising the steps of:

[0061] Using butyl acetate as a solvent, configure a mass fraction of 5% organosilicon-modified acrylate resin solution, then get 5 parts of organosilicon-modified acrylate resin solution and add the above-mentioned 0.8 part of dried modified Al 2 o 3 The particles were uniformly dispersed to prepare a coating; the above coating was sprayed on t...

Embodiment 2

[0063] A modified SiO 2 Particles, nano-SiO modified by dehydroabietic 2 .

[0064] The above modified SiO 2 The preparation method of particle, comprises the steps:

[0065] Adopt ethanol as organic solvent, configuration mass fraction is the dehydroabietic solution of 2%, then take 2 parts of dehydroabietic solutions, add the nanometer SiO of 1 part 2 (average particle size 45nm) and 1 part of dilute sulfuric acid with a mass fraction of 1%, undergo esterification reaction at a certain temperature of 70° C. for 8 hours, filter and wash with ethanol several times and dry to constant weight.

[0066] A preparation method of a bio-based antibacterial superhydrophobic coating, comprising the steps of:

[0067] Adopt methyl ethyl ketone as solvent, configure the organosilicon-modified acrylic acid-polyurethane resin solution with a mass fraction of 3%, get 3 parts of organosilicon-modified acrylic-polyurethane resin solutions and add 2 parts of dried modified SiO 2 The parti...

Embodiment 3

[0069] A modified sepiolite particle is nano sepiolite modified by maleic acid rosin.

[0070] A preparation method of modified sepiolite particles, comprising the steps of:

[0071] Adopt ethanol as solvent, configuration mass fraction is the maleic acid rosin solution of 0.5%, then get 0.5 part of maleic acid rosin solution and add 0.8 part of nanometer sepiolite (average particle diameter 500nm) and 2 parts of mass fraction be 2% Dilute hydrochloric acid, esterify at a certain temperature of 70°C for 24 hours, filter and wash with ethanol several times and dry to constant weight.

[0072] A preparation method of a bio-based antibacterial superhydrophobic coating, comprising the steps of:

[0073] Using isobutyl ketone as the organic solvent, configure a silicone-modified epoxy resin solution with a mass fraction of 10%, take 10 parts of the silicone-modified epoxy resin solution, add 7 parts of dried modified sepiolite particles, and Disperse to prepare a coating; use a s...

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Abstract

The invention belongs to the technical field of coatings, and provides a modified inorganic particle, a preparation method of the modified inorganic particle and application of the modified inorganic particle in a super-hydrophobic material.The modified inorganic particle is prepared by conducting hydrophobic modification on inorganic nano-particles containing hydroxyl through rosin or rosin derivatives with the antibacterial function. The super-hydrophobic coating with the antibacterial function can be prepared by further combining the super-hydrophobic coating with low-surface-energy resin, coating the surfaces of different substrates with the super-hydrophobic coating and curing, use of organic fluorine compounds, metal ions or organic matter quaternary ammonium salt is avoided in the preparation process, the coating is environmentally friendly, biodegradable and good in biocompatibility, and the super-hydrophobic coating has the antibacterial function. The contact angle of water is not less than 152.3 degrees, the antibacterial efficiency is not less than 94.6%, and the antibacterial property on escherichia coli and staphylococcus is achieved.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, to a modified inorganic particle and its preparation method and application in superhydrophobic materials. Background technique [0002] Superhydrophobic coatings have important uses in industry, agriculture, national defense and real life because of their waterproof, anti-fouling, anti-icing and other functions. Superhydrophobic coating refers to a coating with a water contact angle greater than 150°. The coating is usually composed of substances with low surface energy and micro-nano structures. The micro-nano structures are mainly some inorganic nanoparticles, such as SiO 2 、Al 2 o 3 、TiO 2 etc., obtained by hydrophobic modification, and low surface energy substances refer to resins with low surface energy. Mixing micro-nano structure and low surface energy resins, spraying and curing can obtain super water-based coatings. At present, most of the hydrophobic modificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C1/36C09C1/28C09C1/30C09C3/08C09D5/14C09D133/04C09D175/14C09D163/00
CPCC09C1/407C09C1/3669C09C1/28C09C1/3063C09C3/08C09D5/14C09D143/04C09D175/14C09D163/00C08K2201/011C08K2003/2227C08K9/08C08K3/22C08K3/36C08K7/26
Inventor 贾康乐余龙飞黄淋佳刘星星吴海福李欢玲郑小珊宁俊华辛锦兰
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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