Superhydrophobic silicon-aluminum-zirconium composite material and preparation method thereof

A super-hydrophobic, composite material technology, applied in the field of materials, can solve the problems of high brittleness, high preparation cost, unstable structure, etc., and achieve good wear resistance and mechanical resistance, low vibration mass loss rate, and stable structure. Effect

Inactive Publication Date: 2017-06-13
CANEW TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are publicly prepared alumina-zirconia-silica ternary aerogels, but the prepared airgel shrinks greatly, and the structure remains unstable at high temperatures. The preparation period exceeds 3 days, and the preparation cost is high. It is conducive to popularization and use, and the simple airgel structure has the disadvantages of low strength, high brittleness and other poor mechanical properties

Method used

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  • Superhydrophobic silicon-aluminum-zirconium composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] SiO was prepared using the following steps 2 -Al 2 o 3 -ZrO 2 Airgel composites:

[0038] (1) Preparation of alumina sol. Weigh aluminum sulfate, ethanol, and deionized water with a molar ratio of 2:5:8, and stir thoroughly at room temperature to form a colorless and transparent solution.

[0039] (2) Silicon oxide and zirconium oxide. Weigh hexamethyldisilazane, zirconium chloride, ethanol, and deionized water with a molar ratio of 8:0.5:5:8, and fully stir at room temperature to form a colorless and transparent solution.

[0040](3) Preparation of ternary sol. Mix the above two sols, wherein the mass ratio of silicon oxide in the composite airgel to the silicon-aluminum-zirconium airgel is 80%, add a certain amount of propylene oxide, stir for 45 minutes, and stand still to obtain a ternary gel.

[0041] (4) Si-Al-Zr sol impregnated into fiber

[0042] The silica-aluminum-zirconium composite sol is immersed in the pretreated alumina fiber, and the mixture is p...

Embodiment 2

[0049] SiO was prepared using the following steps 2 -Al 2 o 3 -ZrO 2 Airgel composites:

[0050] (1) Preparation of alumina sol. Weigh aluminum sec-butoxide, ethanol, and deionized water with a molar ratio of 1:6:8, and stir fully at room temperature to form a colorless and transparent solution.

[0051] (2) Preparation of silica and zirconia sol. Weigh hexamethyldisilazane, zirconium chloride, ethanol, and deionized water with a molar ratio of 8:1:7:8, and fully stir at room temperature to form a colorless and transparent solution.

[0052] (3) Preparation of ternary sol. The above two sols were mixed, wherein the mass ratio of silicon oxide in the composite airgel to the silicon-aluminum-zirconium airgel was 90%, a certain amount of propylene oxide was added, stirred for 45 minutes, and the ternary gel was obtained by standing still.

[0053] (4) Si-Al-Zr sol impregnated into fiber

[0054] The silica-aluminum-zirconium composite sol is immersed in the pretreated alu...

Embodiment 3

[0061] SiO was prepared using the following steps 2 -Al 2 o 3 -ZrO 2 Airgel composites:

[0062] (1) Preparation of alumina sol. Weigh aluminum sec-butoxide, ethanol, and deionized water with a molar ratio of 1:5:8, and stir fully at room temperature to form a colorless and transparent solution.

[0063] (2) Silicon oxide and zirconium oxide. Weigh tetraethyl orthosilicate, trimethylchlorosilane, zirconium chloride, ethanol, and deionized water with a molar ratio of 3:5:0.5:6:10, and stir fully at room temperature to form a colorless transparent solution.

[0064] (3) Preparation of ternary sol. Mix the above two sols, wherein the mass ratio of silicon oxide in the composite airgel to the silicon-aluminum-zirconium airgel is 70%, add a certain amount of propylene oxide, stir for 60 minutes, and stand to obtain a ternary gel.

[0065] (4) Si-Al-Zr sol impregnated into fiber

[0066] The silicon-aluminum-zirconium composite sol is immersed in the pretreated silicon carbi...

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Abstract

The invention provides a superhydrophobic silicon-aluminum-zirconium composite material and a preparation method thereof. The superhydrophobic silicon-aluminum-zirconium composite material comprises a silicon-aluminum-zirconium aerogel and a fiber material. The silicon-aluminum-zirconium aerogel is composed of the following components in percentage by mass: 30-95% of SiO2, 5-70% of Al2O3 and 0-10% of ZrO2. The method comprises the following steps: impregnating the fiber material into the silicon-aluminum-zirconium aerogel, and carrying out gel and supercritical drying treatment to obtain the superhydrophobic silicon-aluminum-zirconium composite material. According to the technical scheme, the obtained silicon-aluminum-zirconium composite material has the advantages of low vibration mass loss rate and stable structure at high temperature. The method has the advantages of simple technique, high controllability and low cost.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a superhydrophobic silicon-aluminum-zirconium composite material and a preparation method thereof. Background technique [0002] Airgel is a porous solid material highly cross-linked and aggregated by nano-scale particles. It has a continuous three-dimensional network structure and a porosity greater than 90%. It is a lightweight super thermal insulation material. The structural characteristics of airgel make it have special properties in mechanics, thermals, acoustics, optics, electricity, etc. At present, the airgel material of silica system is widely studied and applied, but due to the impact of silica airgel on Infrared rays in the range of 2 μm to 8 μm have no shielding ability, and at high temperatures, the thermal radiation energy in this band will almost completely pass through the aerogel. At the same time at high temperature, SiO 2 The airgel nanopores a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02C04B14/46C04B38/00C01B33/26C04B111/27
CPCC01B33/26C04B14/4618C04B14/4687C04B30/02C04B38/00C04B2201/32C04B2111/27B01J13/0091C04B14/064C04B14/303C04B14/306C04B14/386C04B14/4625C04B14/4656C04B14/4693C04B20/1051C04B38/0045C04B40/0263
Inventor 戴金洲陈晓星刘晓明柯志勇
Owner CANEW TECH SHENZHEN CO LTD
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