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Preparation method of modified silicon dioxide obtained via super-hydrophobic modification

A technology of superhydrophobic modification and silicon dioxide, which is applied in the field of coatings, can solve the problems of inability to meet the continuous requirements of industrialized large-scale production, many processing procedures, and high energy consumption, and achieve extinction performance, high purity, and uniform particle size. Effect

Active Publication Date: 2016-03-16
北京航天赛德科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing hydrophobic modification treatment process of silica matting agent generally adopts wet modification treatment method, that is, the silica substrate needs to be dispersed in the liquid first, and then other operations are performed. The whole process needs to add a large amount of organic additives To ensure the super-hydrophobic effect, long-term high-temperature heat preservation operations are required, and there are many follow-up processing procedures and high energy consumption. As a result, it cannot meet the continuity requirements of industrialized large-scale production, and further improvement is urgently needed

Method used

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  • Preparation method of modified silicon dioxide obtained via super-hydrophobic modification

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preparation example Construction

[0038] The present invention mainly adopts the silica substrate in dry powder state to carry out the hydrophobic modification operation. The preparation method of superhydrophobic modified silica includes:

[0039] (1) Raw materials:

[0040] Raw material A: Silica base material, in dry powder state; the silica base material can be precipitation silica, gel silica or gel silica with surface organic modification; such as surface organic modification The treatment can be modified with polyethylene peroxide wax.

[0041] Raw material B: hydrophobic modifier, using organosilane coupling agent, the organosilane coupling agent using methyltrimethoxysilane, methyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane Silane, octyltrimethoxysilane, octyltriethoxysilane, decyltrimethoxysilane, decyltriethoxysilane, dodecyltrimethoxysilane, dodecyltriethoxysilane Silane, cetyltrimethoxysilane, cetyltriethoxysilane, octadecyltrimethoxysilane or octadecyltriethoxysilane.

[00...

Embodiment 1

[0062] Add raw material A in dual power mixer JHX-P600, 100kg, precipitation method silica dry powder, origin Shandong, keep mixed state, will mix good raw material C, 10kg, wherein 1.5% acetic acid aqueous solution: isopropanol=1: 4. Add raw material A in the form of atomization through the atomization reactor, mix for 10 minutes, add raw material B, octyltriethoxysilane, 19.8kg, keep mixing for 0.5h, keep at 100 °C for 4h, and process it into The average particle size is 3.5 μm.

Embodiment 2

[0064] In the mixer, add raw material A, 80kg, precipitated silica dry powder, origin in Fujian, keep the mixed state, mix the good raw material C, 13.2kg, wherein 1.5% acetic acid aqueous solution: isopropanol=3:8, through the mist Atomization reactor was added to raw material A in the form of atomization, mixed for 10 min, added raw material B, dodecyl triethoxysilane, 13.7 kg, kept mixing for 1 h, kept at 100 ° C for 3 h, and processed into an average particle size by ultra-fine jet pulverization 4.0 μm.

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Abstract

The invention discloses a preparation method of modified silicon dioxide obtained via super-hydrophobic modification. The preparation method comprises following steps: 1) a raw material A (a silicon dioxide base material, dry powder) is delivered into a mixer, a mixed state is maintained, a raw material C (a super-hydrophobic modification accessory ingredient prepared via mixing of 1.5% acetic acid aqueous solution and isopropanol at a mass ratio of 1-3:4-10) is atomized, and is sprayed into the mixed uniformly, and stirring is kept; 2) a raw material B (a hydrophobic modification agent organic silane coupling agent) is atomized, and is sprayed into the mixer uniformly, and stirring is kept; 3) aging is carried out; and 4) ultrafine grinding is carried out so as to obtain a finished product. Fewer processing steps are needed; energy consumption is low; requirements of industrialized large-scale production can be satisfied; particle size distribution of the modified silicon dioxide obtained via super-hydrophobic modification is uniform; pore structures are stable; and hydrophobic performance is stable. The prepared super-hydrophobic silicon dioxide prepared via the preparation method is taken as a flatting agent, and can be used for providing paint with super hydrophobic performance; film forming coating particle arrangement is uniform; and luster is soft.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of superhydrophobic modified silica. Background technique [0002] With the continuous advancement of science and technology, people's requirements for the quality of life are constantly improving, and environmental protection awareness is gradually increasing, which makes the self-cleaning function and anti-corrosion function surface develop rapidly. In the 1990s, the botanist Barthlott of the University of Bonn in Germany discovered that the wax-like substance on the surface of the lotus leaf and the special structure of the surface make the water contact angle of the lotus leaf reach 160°, and its inclination angle is only 2°. In addition, the adhesion of pollutant particles on the surface of the lotus leaf is very low, making it easy for water droplets to slide on the surface, taking away the pollutants and dust on the lotus leaf surface. This structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/04C09C3/10C09D7/12
CPCC09C1/28C09C3/006C09C3/04C09C3/10C09D7/62
Inventor 张忆李春山张周赫刘阳操应军李宝德程彦芬
Owner 北京航天赛德科技发展有限公司
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