A kind of ultra-hydrophobic filter net and preparation method thereof

A filter screen and super-hydrophobic technology, applied in the field of nanomaterials, can solve the problems of unsatisfactory use requirements, high temperature resistance, corrosion resistance and super-hydrophobic performance are not ideal, and achieve reduced energy consumption and production costs, excellent super-hydrophobic performance, A wide range of effects

Active Publication Date: 2021-11-23
ROCKET FORCE UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing superhydrophobic filter screens are not ideal for high temperature resistance, corrosion resistance and superhydrophobic performance, and cannot meet people's needs for use.

Method used

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  • A kind of ultra-hydrophobic filter net and preparation method thereof
  • A kind of ultra-hydrophobic filter net and preparation method thereof
  • A kind of ultra-hydrophobic filter net and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation process of superhydrophobic filter net is:

[0040] (1) Mix boron oxide and magnesium powder at a molar ratio of 1:1.5 to 1:2.5, and ball mill in a planetary ball mill for more than 0.5 hours under the protection of nitrogen to obtain a solid powder with a particle size of 2 to 10 microns, boron nitride The molecular formula is BN.

[0041] (2) Place the solid powder obtained in step (1) in a square porcelain boat, place a 30mm×30mm metal mesh at the center of the top of the porcelain boat, and place the porcelain boat in a tubular atmosphere protection annealing furnace. Put an inert protective atmosphere into the furnace tube of the tubular atmosphere protection annealing furnace, start heating from normal temperature under the protection of 20-200ml / min inert protective atmosphere, the heating rate is 5-80°C / min, and the temperature rises to 300-500°C Close the inert protective atmosphere valve at the same time, pass high-purity ammonia gas into the ...

Embodiment 1

[0044] (1) Boron oxide and metal magnesium powder are mixed according to the molar ratio of 1:2, placed in a ball mill tank, and under the protection of nitrogen, adopt the mode of forward and reverse alternating operation, and ball mill for 4 hours to obtain a uniformly mixed solid powder, granular The diameter is about 2 to 10 microns.

[0045] (2) Place the solid powder obtained in step (1) in a square porcelain boat of 60mm×30mm, place a piece of metal mesh of 30mm×30mm on the porcelain boat, and make it in the middle position, at 20ml / min Under the protection of argon, start to heat up from normal temperature, and the heating rate is 10°C / min. When the temperature rises to 300°C, close the argon valve, feed high-purity ammonia gas, with a flow rate of 150ml / min, continue to heat up to 1225°C, and keep warm for 8 hours. , and then stop feeding high-purity ammonia gas, then naturally cool down to room temperature under an inert protective atmosphere, and deposit a white sub...

Embodiment 2

[0052] Change the reaction temperature of step (2) in Example 1 to 1250° C., and other operations are the same as in Example 1, and the product obtained is the same as in Example 1.

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Abstract

The invention discloses a super-hydrophobic filter net and a preparation method thereof, comprising a metal net, a plurality of boron nitride nanotubes growing on the surface of the metal net, the roots of the boron nitride nanotubes are perpendicular to the surface of the metal net, and the roots of the boron nitride nanotubes are The diameter is larger than the diameter of the top, and the appearance of the boron nitride nanotube is conical near the top, and the rest is cylindrical. Mix boron oxide powder and magnesium powder at a molar ratio of 1:1.5 to 1:2.5, place them in a container, place a piece of metal mesh at the center of the upper part of the container, and place the container in a tubular atmosphere protection annealing furnace; An inert protective atmosphere is introduced into the furnace tube of the annealing furnace. When the temperature rises to 300-500°C, the argon gas is stopped, and high-purity ammonia gas is introduced, and the temperature is continued to rise to 1200-1300°C, and the temperature is kept for 2-12 hours, then stop Introduce high-purity ammonia gas, inert protective atmosphere, and naturally cool down to room temperature to obtain a high-temperature-resistant and corrosion-resistant super-hydrophobic filter.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a superhydrophobic filter net and a preparation method thereof. Background technique [0002] Oily wastewater is a common wastewater produced by industries such as petrochemical, food, textile, leather and metallurgy. These wastewater usually contain insoluble oily substances and soluble harmful pollutants. Direct discharge will pollute rivers and water sources. Indirect air, soil pollution, serious harm to the natural environment and human health. Water pollution is a major global problem, and how to purify and separate useful water from sewage is a challenge facing the world today. The traditional treatment methods of oily wastewater mainly include gravity and mechanical separation method, air flotation method, adsorption method, flocculation method, microbial method and membrane separation method. Among them, the membrane separation method is widely used, but in practical ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/12C01B21/064
CPCB01D39/12B01D2239/0428C01B21/064
Inventor 李艳娇刘延飞秦忠宝郭剑锋侯立安
Owner ROCKET FORCE UNIV OF ENG
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