A kind of preparation method of superhydrophobic filter net of growing boron nitride nano-coral on the surface

A technology of surface growth and boron nitride, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve problems such as difficult cleaning, high operating costs, membrane pollution, etc., and achieve reduced mesh size, good adsorption performance, The effect of increasing the specific surface area

Active Publication Date: 2021-03-26
ROCKET FORCE UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the membrane separation method is widely used, but in practical applications, there are problems such as serious membrane pollution, difficult cleaning, and high operating costs.

Method used

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  • A kind of preparation method of superhydrophobic filter net of growing boron nitride nano-coral on the surface
  • A kind of preparation method of superhydrophobic filter net of growing boron nitride nano-coral on the surface
  • A kind of preparation method of superhydrophobic filter net of growing boron nitride nano-coral on the surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment includes the following steps:

[0042] Step 1. After mixing boron oxide and iron powder according to the molar ratio of 1:1, use a planetary ball mill in a nitrogen protective atmosphere to carry out ball milling treatment for 4 hours in the forward and reverse alternate operation mode to obtain ball milling powder; the ball milling powder The particle size is 2μm~10μm;

[0043] Step 2, place the ball mill powder obtained in step 1 in a square porcelain boat, then place a 30mm×30mm (length×width) stainless steel wire mesh on the upper center of the square porcelain boat for annealing treatment, and deposit nitrogen on the stainless steel wire mesh boron nitride nano-coral, obtain the superhydrophobic filter net of boron nitride nano-coral growing on the surface; the area of ​​the stainless steel wire mesh is less than the area of ​​the square porcelain boat; the process of the annealing treatment is: first pass into Argon protective atmosphere, in the a...

Embodiment 2

[0066] The difference between this embodiment and embodiment 1 is: the time of heat preservation in step 2 is 2h.

[0067] After testing, a large number of dense boron nitride nano-corals grew on the surface of the super-hydrophobic filter prepared in this example, and the contact angle between the super-hydrophobic filter and water droplets was as high as 166°.

Embodiment 3

[0069] The difference between this embodiment and embodiment 1 is: the time of heat preservation in step 2 is 6h.

[0070] After testing, a large number of dense boron nitride nano-corals grew on the surface of the super-hydrophobic filter prepared in this example, and the contact angle between the super-hydrophobic filter and water droplets was as high as 170°.

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Abstract

The invention discloses a preparation method of a super-hydrophobic filter screen with boron nitride nano coral grown on the surface. The method comprises the following steps: 1. mixing boron oxide and an iron-containing catalyst, and carrying out ball milling to obtain ball-milled powder; and 2, placing the ball-milled powder in a square porcelain boat, carrying out annealing treatment, and depositing a layer of white substance, namely the boron nitride nano coral, on an iron-containing metal wire mesh to obtain the super-hydrophobic filter screen with the boron nitride nano coral grown on the surface. Part of boron oxide is gasified through ball-milling activation and iron catalysis and quickly reacts with ammonia gas under the catalytic action of the iron-containing metal wire mesh, a large number of BN nano coral structures with dense BN nanosheets vertically growing on the surface are generated on the surface of the iron-containing metal wire mesh, the mesh size is reduced due tothe existence of the structures, the mesh specific surface area is increased, and a nanoscale uneven surface structure is formed, so that the filter screen has excellent adsorption characteristics andsuper-hydrophobic characteristics, and is suitable for the fields of oil-water separation, sewage deep filtration, high-temperature flue gas deep filtration and the like.

Description

technical field [0001] The invention belongs to the technical field of nano-material preparation, and in particular relates to a method for preparing a super-hydrophobic filter with boron nitride nano-coral growing on the surface. Background technique [0002] Water pollution is a major global problem. How to purify and separate useful water from sewage is a challenge facing the world today. A common method for treating sewage is to use adsorption filter materials to absorb and remove impurities in sewage. Traditional adsorption filter materials are limited by the size of the mesh and can filter large-sized impurities, but cannot adsorb and filter micron and nano-sized impurities. As a result, these small-sized impurities remain in the treated sewage, and deep purification cannot be achieved. How to deal with the micron-sized and nano-sized impurities in sewage is a difficult problem in the field of sewage treatment. [0003] Oily wastewater is a common wastewater produce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/34C23C16/46B01D39/12B82Y40/00
CPCB01D39/12B01D2239/10B82Y40/00C23C16/342C23C16/46
Inventor 李艳娇秦忠宝刘延飞田仁慧侯立安
Owner ROCKET FORCE UNIV OF ENG
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