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Super-hydrophobic/super-oleophilic oil-water separating net

An oil-water separation net, super lipophilic technology, applied in liquid separation, separation methods, chemical instruments and methods, etc., can solve the problem that the uniformity of the mesh aperture cannot be guaranteed, the microporous oil-water separation net cannot be made, and the mesh aperture cannot be guaranteed. Uniformity and other problems, to achieve strong acid and alkali resistance, good hydrophobic effect, non-blocking effect

Inactive Publication Date: 2007-10-24
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the need to spray the metal mesh with the help of glue, the holes must be blown immediately due to the fact that the glue is easy to form a film and block the holes. Porous oil-water separator
[0006] (2) The consolidation temperature used is as high as 280-320°C, which limits the selection range of mesh materials
[0007] (3) The thickness of the sprayed layer is 5-10 μm, the spraying process cannot be precisely controlled, and the uniformity of the mesh aperture after spraying cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Degrease the 400-mesh polyester net with acetone, rinse it with distilled water and dry it.

[0028] (2) Soak the defatted mesh in 5% hydrochloric acid solution for 30 minutes, take it out, rinse it with distilled water, and dry it in an oven at 90°C.

[0029] (3) Mix 1.5g perfluoroalkyl siloxane, 87g dehydrated alcohol, 10g water and 1.5g0.1mol / L hydrochloric acid, stir and react at room temperature for 1 hour to obtain perfluoroalkyl siloxane gel Sol.

[0030] (4) At room temperature, the polyester mesh was soaked in the prepared perfluoroalkylsiloxane gel sol, then dried in the air, repeated four times, and placed in an oven at 120°C for 60 minutes. A superhydrophobic / superoleophilic oil-water separation net can be obtained. Film thickness 20-50nm.

Embodiment 2

[0032] (1) Degrease the 1000-mesh stainless steel mesh with acetone, rinse it with distilled water and dry it.

[0033] (2) At room temperature, mix saturated sodium dichromate and concentrated sulfuric acid at a weight ratio of 3~3.5:100 to prepare an acid solution.

[0034] (3) Soak the degreased mesh in acid solution at 65°C for 30 minutes, rinse it with distilled water, and dry it in an oven at 80°C.

[0035] (4) Mix 0.5g perfluoroalkylsiloxane, 88g dehydrated alcohol, 10g water and 1.5g0.1mol / L hydrochloric acid, stir and react at room temperature for 0.5 hour to obtain perfluoroalkylsiloxane gel Sol.

[0036] (5) Soak in the prepared perfluoroalkylsiloxane gel sol for 5 seconds at room temperature, take it out and dry it in the air, repeat four times, and put it in an oven at 150°C for 30 minutes. A superhydrophobic / superoleophilic oil-water separation net with a film thickness of 20-50nm can be obtained. The net is used for the separation of diesel oil and water mixt...

Embodiment 3

[0039] (1) Degrease the 500-mesh nylon mesh with ethyl acetate, rinse it with distilled water and dry it.

[0040] (2) Soak the defatted nylon mesh in 5% sulfuric acid solution at room temperature for 30 minutes, rinse it with distilled water, and dry it at 100°C.

[0041] (3) Mix 0.1g of perfluoroalkylsiloxane, 88.4g of absolute ethanol, 10g of water and 1.5g of 0.1mol / L hydrochloric acid, and stir for 2 hours to obtain a perfluoroalkylsiloxane gel Sol.

[0042] (4) Soak the nylon mesh in the prepared perfluoroalkylsiloxane gel sol at room temperature, dry it twice, and put it in an oven at 80°C for 60 minutes. A superhydrophobic and superoleophilic oil-water separation net can be obtained. The thickness of the polyperfluoroalkylsiloxane film formed by covering the surface of the separation net is 20-50nm.

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PUM

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Abstract

Super hydrophobic / super oleophylic oil-water separation net has meshes 300-1500 covered thin perfluoroalkyl siloxane copolymer membrane with thickness 20~50nm, which can be metal fiber fabric of stainless steel or cupper, or fabric or terylene and nylon. Its preparation method is: 1. degrease, clean with acid and bath to the fabric net and dry; 2. for the weight share, mix the liquid with perfluoroalkyl siloxane 0.1-5%, water 1-10%, hydrochloric acid or 1N 0.1-2% and other is alcohol for 30-120 minutes, form gel-sol; 3. dip the net into gel-sol for 3-30 seconds, take out, dry naturally, repeat for 2-8 times; 4. take hot curing for the fabric net at 80-250Deg for 10-120 minutes, obtain the membrane and oil-water separation net.

Description

1. Technical field [0001] The invention relates to a super-oleophilic / super-hydrophobic oil-water separation net and a preparation method thereof. It belongs to the technical field of functional materials. 2. Background technology [0002] Moisture and impurities in oil products are the key factors affecting the quality of oil products. It is an important subject in the separation process to seek economical and practical and continuous removal of water in oil products. [0003] For example, application number: 0110215, authorized publication number: Chinese invention patent application of CN1126583, discloses a kind of technical scheme that utilizes metal mesh to pass oil and retain water. It adopts the method of coating glue on the metal mesh first, then blowing the mesh with high-pressure wind, and then spraying polyfluoroethylene propylene powder on the mesh to heat, solidify and then cool. Has a certain separation effect. [0004] But there is following defect in abov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022
Inventor 王庆军
Owner NANJING UNIV
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