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Preparation method of intelligent oil-water separation membrane with stain-resistant performance

A technology of oil-water separation membrane and performance, applied in the field of preparation of intelligent oil-water separation membrane, can solve the problems of poor mechanical durability of omentum, poor durability and mechanical properties of oil-water separation membrane, 2D planar network structure micro-nano structure is easily damaged, etc. problem, to achieve the effect of good mechanical durability, durability performance and mechanical performance improvement

Inactive Publication Date: 2018-11-06
洛阳纳诺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional oil-water separation materials usually have ultra-high or ultra-low surface energy, they can only be wetted by oil or water, and can only realize the passage of oil or water unilaterally, and the mechanical durability of the prepared omentum is poor, mainly It is due to the micro-nano structure of its 2D planar network structure that is easily damaged
[0006] Patent document CN107096391A discloses a one-step spraying method to spray biomass powder, such as corn stalk powder, and polyurethane on steel mesh, copper mesh, cotton cloth, nylon mesh or non-woven fabric, and then wet it with water to achieve superhydrophilicity. / Super-oleophobic, and wetting with oil can achieve super-oleophilic and super-hydrophobic characteristics. The prepared mesh can be used to continuously separate different types of oil-water mixtures, but the constructed oil-water separation membrane has poor durability and mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Etching of stainless steel fiber felt: ultrasonically clean the 4cm×4cm stainless steel fiber felt with ethanol and water for 15 minutes, and then soak in a solution containing 200g / L ferric chloride, 200ml / L nitric acid, and 50mL / L hydrochloric acid for 10 minutes , washed with 1mol / L dilute hydrochloric acid to remove the ferric chloride on the surface, washed with deionized water and ethanol, and dried in air.

[0028] (2) Spray No. 75 spray glue from 3M Company of the United States on the surface of the etched stainless steel fiber felt, and dry in the air;

[0029] (3) 1g of TiO with a particle size of 25nm 2 , 2g anatase TiO 2 (5-10nm), 3g of DuPont's FS-50 fluorocarbon surfactant was dispersed in 97g of ethanol under the action of ultrasonic waves and stirred for 30 minutes to obtain a uniform gel-like emulsion—nano-TiO 2 Ethanol emulsion;

[0030] (4) Place the treated stainless steel felt in nano-TiO 2 2 hours in ethanol emulsion;

[0031] (5) Take out...

Embodiment 2

[0034] (1) Stainless steel fiber felt etching: ultrasonically clean the 4cm×4cm stainless steel fiber felt with ethanol and water for 15 minutes, soak the fiber felt in 250g / L ferric chloride, 200ml / L nitric acid solution for 8 minutes, and use 1mol / L dilute hydrochloric acid to wash away the ferric chloride on the surface, wash with deionized water and ethanol, and dry in the air;

[0035] (2) Spray the etched stainless steel fiber felt on both sides with No. 67 spray glue from 3M Company in the United States, and dry it in the air;

[0036] (3) At room temperature, add 1ml of 0.2M HCl aqueous solution dropwise to 7mL of tetrabutyl titanate and 5g of DuPont FCS-003 in 100mL of ethanol solution, and stir rapidly to fully hydrolyze to obtain nano-TiO 2 Ethanol emulsion;

[0037] (4) Nano-TiO 2 The ethanol emulsion is sprayed on both sides of the stainless steel fiber felt under 0.4MPa air pressure;

[0038] (5) Dry in air at 100°C for 3 hours.

[0039] The prepared intellige...

Embodiment 3

[0041] (1) Stainless steel fiber felt etching: ultrasonically clean the 4cm×4cm stainless steel fiber felt with ethanol and water for 15 minutes respectively, and soak the fiber felt in a solution containing 250g / L ferric chloride, 200ml / L nitric acid, and 10mL hydrochloric acid for 12 minutes , washed with 1mol / L dilute hydrochloric acid to remove the ferric chloride on the surface, washed with deionized water and ethanol, and dried in air.

[0042] (2) Spray 5% polydimethyldiallylammonium chloride aqueous solution on the surface of the etched stainless steel fiber felt, and dry it in the air at room temperature;

[0043] (3) At room temperature, add 1.5ml of 0.2M HCl aqueous solution dropwise to 10mL of tetrabutyl titanate and 6g of DuPont FS-50 in 100mL of ethanol solution, and stir rapidly to fully hydrolyze to obtain nano-TiO 2 Ethanol emulsion;

[0044] (4) Put the stainless steel fiber felt in the nano TiO 2 5 hours in ethanol emulsion;

[0045] (5) Take out the stai...

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Abstract

The invention discloses a preparation method of intelligent oil-water separation membrane with stain-resistant performance. Through etching and chemical deposition, a micro-nano layered structure is constructed on the surface of a stainless steel fiber mat with a 3D-net porous structure, the prepared stainless steel fiber mat is prone to be wet by water and oil, and after water is used for pre-wetting, the metal fiber mat shows the performance of super-hydrophilicity and super-lipophobicity in an oil-water mixture; while after oil is used for pre-wetting, the metal fiber mat shows the performance of super-lipophilicity and super-hydrophobicity in the oil-water mixture, and the prepared stainless steel fiber mat oil-water separation membrane can be used for separating oil-water mixtures ofmany types. The preparation method of the intelligent membrane which has the advantages of good durable performance and mechanical performance, high flux, high separation efficiency, stain resistant,low cost, easiness of industrialize and capability of continuous oil-water mixture separation is provided.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a preparation method of an intelligent oil-water separation membrane with antifouling performance. Background technique [0002] Due to the increasing industrial oily wastewater and frequent offshore oil spills, efficient oil-water separation technology is becoming more and more urgent. Traditional oil-water separation technologies such as degradation method, air flotation method, gravity method and other oil-water separation methods have obvious deficiencies, including low separation efficiency, high consumption, and secondary pollution. As an attractive technical solution, membrane separation technology has many advantages, such as environmental friendliness, high separation efficiency, low consumption, energy saving, space saving, etc. Oil-water separation membranes require a surface material with completely opposite wettability to oil and water, th...

Claims

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Application Information

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IPC IPC(8): B01D17/02B01D67/00B01D69/12
CPCB01D17/02B01D17/085B01D67/0088B01D69/12B01D2323/12B01D2325/30B01D2325/36
Inventor 杨晓亮
Owner 洛阳纳诺环保科技有限公司
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