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Production method of superhydrophobic/superlipophilic high-efficiency oil-water separation membrane

An oil-water separation membrane and super-lipophilic technology, which is applied in separation methods, permeation/dialysis water/sewage treatment, liquid separation, etc., can solve problems such as expensive raw materials, membrane clogging, and practical application obstacles, and achieve simple preparation methods, Efficient separation, easy to scale up the effect of industrial implementation

Inactive Publication Date: 2018-11-09
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

Many research efforts have been devoted to the development of polymer membranes, ceramic membranes, carbon-based membranes and zeolite membranes for oil-water filtration. The ceramic membrane is easily polluted by the oil in the oil-water mixture, causing the membrane to be clogged, thus affecting the normal operation of the separation
The practical application of carbon-based films, including carbon nanotubes and graphene oxide, is still largely hindered due to their expensive precursors and complicated preparation processes.
[0005] The preparation process of the superhydrophobic separation membrane is divided into the construction of the micro-nano layered structure and the hydrophobic modification of the separation membrane. When constructing the micro-nano layered structure, the common method is on the substrate, such as: cotton cloth, nylon cloth, glass Micro-nano structures are constructed on the surface of fiber cloth, copper mesh, and stainless steel mesh by laser etching, electrolysis, hydrothermal method, layer-by-layer self-assembly, etc., but some of these methods require large and expensive equipment, and some preparation procedures are cumbersome , some raw materials are expensive, these deficiencies all affect the wide application of oil-water separation membrane technology

Method used

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  • Production method of superhydrophobic/superlipophilic high-efficiency oil-water separation membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Preparation of dipping solution: Add 20mL of 0.5mmol / L sodium dodecyl sulfate and 4mmol / L citric acid mixture solution to 20mL of 0.5mmol / L sodium dodecyl sulfate and 2mmol / L copper sulfate at 20°C The aqueous solution of the mixture was fully stirred at room temperature, the concentration of 30% sodium hydroxide aqueous solution was added dropwise to adjust the reaction to a system pH value of 10-12, and 10 mL of 0.8mol / L sodium borohydride aqueous solution was added dropwise under stirring and the temperature was gradually raised to 70 ℃, stirred for 1-3h and set aside.

[0028] The pre-cleaned 3cm×3cm 300-mesh stainless steel mesh was soaked at a temperature of 60°C for 12h, then washed with ethanol and deionized water to remove the dispersant, and dried. Soak the treated stainless steel mesh in 20mL of 3mmol / L ethanol solution of dodecanethiol at 45°C for 24h, and dry it in air at 40°C for later use.

[0029] The mixed solution of soybean oil and water with a volum...

Embodiment 2

[0031] Preparation of dipping solution: Add 20 mL of a mixture of 1 mmol / L sodium lauryl sulfate and 1.6 mmol / L tannic acid dropwise to 20 mL of 1 mmol / L sodium lauryl sulfate and 0.8 mmol / L at 30°C In the mixed aqueous solution of copper nitrate and fully stirred at room temperature, 30% sodium hydroxide solution was added dropwise to adjust the reaction to a system pH of 10-12, and 10 mL of 0.5 mol / L sodium borohydride aqueous solution was added dropwise while stirring, and the temperature was gradually raised to 80 ° C. Stir for 3h and set aside.

[0032] Soak the pre-cleaned 3cm×3cm 200-mesh copper mesh at a temperature of 70°C for 6 hours to ensure that the copper mesh is completely wetted by the dipping solution, then wash off the dispersant with ethanol and deionized water, and dry. Soak the treated copper mesh in 20 mL of 3 mmol / L ethanol solution of stearic acid at 55°C for 30 hours, and dry it in air at 80°C for later use.

[0033] The mixed solution of diesel oil a...

Embodiment 3

[0035] Preparation of dipping solution: Add 20mL of 0.3mmol / L sodium lauryl sulfate and 2 mmol / L vitamin C mixture solution dropwise to 20mL of 0.3mmol / L sodium lauryl sulfate and 1 mmol / L at 60°C Put the mixture of copper chloride in the aqueous solution and fully stir at room temperature, add dropwise 30% sodium hydroxide solution to adjust the reaction to a system pH of 10-12, add dropwise 10mL of 1mol / L potassium borohydride aqueous solution under stirring and gradually heat up to 60°C, stir 3 hours to spare.

[0036] Soak the pre-cleaned 3cm×3cm stainless steel metal fiber felt at a temperature of 70°C for 8 hours, then wash away the dispersant with ethanol and deionized water, and dry. Soak the treated stainless steel metal fiber felt in 20 mL of 4 mmol / L ethanol solution of lauric acid at 75 °C for 30 hours, and dry it in air at 95 °C for later use.

[0037] The mixed solution of engine oil and water with a volume ratio of 10: 1 was used for oil-water separation experime...

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Abstract

The invention discloses a production method of a superhydrophobic / superlipophilic high-efficiency oil-water separation membrane. The production method comprises the following steps: constructing a copper oxide micro-nano layered structure on the surface of a metal net membrane or an organic fiber net membrane by using a chemical dip-coating technology; and carrying out superhydrophobic and superlipophilic chemical modification on the micro-nanostructure on the surface of the membrane by using a modifier through a dip-coating technology, and drying the modified membrane to obtain the superhydrophobic, superlipophilic and ultra-durable oil-water separation membrane. A preparation method of a chemical dip-coating solution used for constructing the copper oxide micro-nano layered structure comprises the following steps: dropwise adding a mixed solution of a complexing agent and a dispersant into a mixed solution of the dispersant and a cupric salt in order to prepare an organic copper saltcomplex; adding an aqueous solution of a precipitating agent under stirring until the pH value of the obtained system is 10-12, and carrying out a reaction to form a nano-copper oxide particle mixture; and dropwise adding an aqueous solution of a stabilizer under stirring in order to obtain the stable nano-copper oxide dip-coating solution. The production method has the advantages of no need of complicated devices construction processes, and easiness in industrial enforcement.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a preparation method of a superhydrophobic / superoleophilic oily wastewater separation membrane. Background technique [0002] With the exploitation of offshore oil and the marine ecological disaster caused by the leakage of oil products during oil transportation, a large amount of oily wastewater is produced in the process of industrial production. These oily wastewater have caused great harm to the ecological environment, and oil-water separation has become a widespread concern. global problem. [0003] With the continuous development of modern industrial technology, various oil-water separation technologies have been widely used. At present, the known oil-water separation methods mainly include gravity separation, electrolysis separation, adsorption separation and so on. Gravity separation includes oil scraping method, centrifugation method, and flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D71/06C02F1/44C02F1/40
CPCB01D71/022B01D71/06C02F1/40C02F1/44
Inventor 杨晓亮
Owner 洛阳纳诺环保科技有限公司
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