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Oil-water separation membrane with smooth surface

An oil-water separation membrane and smooth surface technology, applied in the field of biomimetic material chemistry, can solve the problems of easy adsorption of bacteria, poor physical wear resistance, etc., and achieve the effects of high separation efficiency, good anti-pollution performance and reusability

Active Publication Date: 2019-01-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of superhydrophobic materials has the disadvantages of easy adsorption of bacteria and poor physical wear resistance.

Method used

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  • Oil-water separation membrane with smooth surface
  • Oil-water separation membrane with smooth surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: A kind of preparation method of the oil-water separation membrane with smooth surface, concrete steps are:

[0023] (1) Pre-treatment: Ultrasonic cleaning of commercialized polyester fiber membranes (with a porosity of 60% of the total volume) with absolute ethanol for 30 minutes to remove dust and oil on the surface of the material, dry and set aside.

[0024] (2) Roughening treatment: the polyester fiber membrane is roughened by an ex-situ method. Under the condition of 80 DEG C, the polyester fiber film after the pretreatment of step (1) is placed in sodium hydroxide and dodecyl dimethyl benzyl ammonium chloride solution, the mass ratio of the two is 5: 1, Take it out after reacting for 10 minutes; then soak it in the absolute ethanol solution of γ-aminopropyltriethoxysilane at 35°C for 1h, wherein the volume ratio of γ-aminopropyltriethoxysilane to absolute ethanol The ratio is 1:99; finally, place silica nanoparticles in acetate buffer at 35°C for 1 ...

Embodiment 2

[0028] Embodiment 2: A kind of preparation method of the oil-water separation membrane with smooth surface, concrete steps are:

[0029] (1) Pretreatment: Ultrasonic cleaning of commercialized nylon fiber membranes (with a porosity of 55% of the total volume) with anhydrous ethanol for 30 minutes to remove dust and oil on the surface of the material, dry, and set aside.

[0030] (2) Roughening treatment: the nylon fiber membrane was roughened by an in-situ method. Add 50mL of ethanol to a clean three-necked beaker, and add 3mL of ammonia water dropwise in proportion, stir at 60°C for more than 30min to make it evenly mixed, then add 3mL of ethyl orthosilicate dropwise in proportion to the three-necked flask, and continue to stir for more than 3h , to obtain a milky white uniform sol, pour it into a beaker, and leave it to stand for 24 hours for subsequent use; immerse the nylon fiber membrane after the pretreatment in step (1) in the sol-gel solution for 20 minutes, rinse it w...

Embodiment 3

[0034] Embodiment 3: A kind of preparation method of the oil-water separation membrane with smooth surface, concrete steps are:

[0035] (1) Pretreatment: The surface of the commercialized polyethersulfone porous membrane was ultrasonically cleaned with anhydrous ethanol for 30 minutes to remove dust and oil on the surface of the material, dried, and set aside. The membrane pore size was 60 μm.

[0036] (2) Roughening treatment: the polyethersulfone porous membrane was roughened by an ex-situ method. The polyethersulfone porous membrane after the pretreatment of step (1) is wetted with ethanol, and then immersed in tris / hydrochloric acid buffer solution (50mM, pH=8.5) dissolved with dopamine hydrochloride and polyethyleneimine, Wherein, the concentrations of dopamine and polyethyleneimine are both 1 mg / mL. After 4 h of deposition, the obtained polyethersulfone porous membrane was washed with deionized water for 24 h. Then, 1.5 mL of methyl orthosilicate was added into 100 mL...

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Abstract

The invention discloses an oil-water separation membrane with a smooth surface, and a preparation method thereof, and belongs to the field of biomimetic material chemistry. The oil-water separation membrane adopts a polymer membrane having a silica rough structure on the surface as a solid substrate, lubricating oil is poured into the silica rough structure on the surface of the polymer membrane as a surface lubricant, and the desired polymer membrane substrate and lubricating oil have diversity; and the oil-water separation membrane has a high separation rate when used to separate an oil-water mixture and a water-in-oil emulsion, can recover the separation rate through pure water washing after being used multiple times, can be repeatedly used, and has good anti-pollution performance and good recyclability.

Description

technical field [0001] The invention belongs to the field of bionic material chemistry, in particular to an oil-water separation membrane with a smooth surface. Background technique [0002] With the development of science and technology, people's awareness of environmental protection is constantly improving. In industrial production, due to the massive discharge of oily wastewater and the frequent occurrence of oil spill accidents, the damage to the environment has attracted widespread attention. So far, there are many treatment technologies for oily wastewater, such as air flotation, gravity separation, adsorption separation, coagulation and flocculation and other methods. However, there are still many technical difficulties in the efficient discharge of oily wastewater and the separation of oil-water emulsions stabilized by surfactants. Membrane separation technology has high separation efficiency and simple operation process. It is mainly used to separate stable oil-wa...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/0202
Inventor 赵莉芝张玉忠许瑞赵雅香李日舜
Owner TIANJIN POLYTECHNIC UNIV
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