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Method for synthesizing hydrophobic silicon dioxide nano fiber by heat evaporation of gold-plate silicon sheet

A silicon dioxide and nanofiber technology, applied in the field of nanomaterials, can solve the problems of high cost, low contact angle, complicated preparation procedures, etc., and achieve the effects of high hydrophobicity, low cost, and simple equipment and process.

Inactive Publication Date: 2009-06-03
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are: the preparation procedure is complicated, the cost is high, and the contact angle is not high

Method used

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  • Method for synthesizing hydrophobic silicon dioxide nano fiber by heat evaporation of gold-plate silicon sheet
  • Method for synthesizing hydrophobic silicon dioxide nano fiber by heat evaporation of gold-plate silicon sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A ceramic boat equipped with two gold-plated silicon wafers (1cm X 1cm) obtained by magnetron sputtering for 5 minutes was placed in the center of a quartz tube furnace, and the temperature was raised to a reaction temperature of 1350°C at a rate of 10°C / min. When starting to heat up, argon gas with a gas flow rate of 50ml / min was introduced; at a reaction temperature of 1350°C, the gas flow rate in the chamber was maintained, and the reaction continued for 3 hours. After the reaction, the reaction product was taken out, and a large amount of Disordered silica nanofibers, see figure 1 , it can be seen from the figure that a large number of disordered silica nanofibers are produced on the surface of the silicon wafer. Seal the synthesized silica nanofibers and 0.05ml of perfluorosilane and put them into a stainless steel tank together, and carry out the evaporation reaction at 150 degrees for 3.0 hours to obtain superhydrophobic carbon dioxide with a contact angle greate...

Embodiment 2

[0031] A ceramic boat equipped with two gold-plated silicon wafers (1cm X 1cm) obtained by magnetron sputtering for 10 minutes was placed in the center of a quartz tube furnace, and the temperature was raised to a reaction temperature of 1400°C at a rate of 10°C / min. When the temperature starts to rise, argon gas with a gas flow rate of 200ml / min is introduced; at a reaction temperature of 1350°C, the gas flow rate in the chamber is maintained, and the reaction continues for 5 hours. After the reaction, the reaction product is taken out, and a large amount of Disordered silica nanofibers. The synthesized silica nanofibers and 0.1ml of perfluorosilane were sealed and placed in a stainless steel tank, and the vapor deposition reaction was carried out at 150 degrees for 3.0 hours to obtain a superhydrophobic nanofiber with a contact angle of 155 degrees. Silica nanofibers, see figure 2 , it can be seen from the figure that the silica nanofibers show good hydrophobic properties....

Embodiment 3

[0033] A ceramic boat equipped with two gold-plated silicon wafers (1cm X 1cm) obtained by magnetron sputtering for 15 minutes was placed in the center of a quartz tube furnace, and the temperature was raised to a reaction temperature of 1350°C at a rate of 10°C / min. At the beginning of the temperature rise, argon with a gas flow rate of 400ml / min was introduced; at a reaction temperature of 1350°C, the gas flow rate in the chamber was maintained, and the reaction continued for 6 hours. After the reaction, the reaction product was taken out, and a large amount of Disordered silica nanofibers. The synthesized silica nanofibers and 0.2ml of perfluorosilane were sealed and placed in a stainless steel tank, and the evaporation reaction was carried out at 150 degrees for 3.0 hours to obtain superhydrophobic carbon dioxide with a contact angle greater than 150 degrees. Silicon nanofibers.

[0034] It can be seen from the above examples that the present invention has simple process,...

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Abstract

The invention provides a method of synthesis the hydrophobicity silicon dioxide nanometer fiber with the heat evaporation gold-plating silicon chip, which belongs to nanometer material domain. This invention uses the silicon chip as the response substrate and the silicon source, uses aurum as respond accelerant, and uses argon which is the inert gas as the protective gas. The silicon separates out the coring growth from the silicon chip under the catalytic action of argon and is oxidized into the silicon dioxide nanometer fiber. After coating by vaporization a slice of fluorine silane in the surface of the silicon dioxide nanometer fiber, thus it can obtain superhydrophobicity silicon dioxide nanometer fiber whose contact angle is more than 150 deg. This invention is easy to operation, doesn't have the pollution to the environment, and doesn't have obvious flammable dangerous raw material. Since it's superhydrophobicity is high, it can apply in many clean situation.

Description

technical field [0001] The invention relates to a method in the technical field of nanomaterials, in particular to a method for synthesizing hydrophobic silicon dioxide nanofibers by thermally evaporating gold-plated silicon wafers. Background technique [0002] Hydrophobic materials have important applications in many fields due to their self-cleaning function, such as various automotive windshields, radars, antennas and other fields that require moisture-proof functions. At present, people have carried out various researches on the hydrophobic properties of various organic materials and other materials. Hydrophobicity with a large contact angle generally requires two basic conditions. One is that the surface of the material has a certain roughness, and the other is that the surface free energy is relatively low. Due to its special geometric structure and surface roughness, one-dimensional nanomaterials meet the requirements of hydrophobicity. Therefore, one-dimensional na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/26C23C14/08C23C14/12C23C14/54
Inventor 牛俊杰王健农
Owner SHANGHAI JIAOTONG UNIV