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Candle-ash-assisted super-hydrophobic and super-oleophilic oil-water separation mesh film as well as preparation method and application of mesh film

A super-hydrophobic, off-grid membrane technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of low recycling rate, slow separation rate, application limitations, etc., and achieve low equipment requirements and easy recycling. , the effect of high temperature resistance

Inactive Publication Date: 2015-12-16
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are also many problems in the traditional oil-water separation technology, including slow separation rate, low efficiency, low recycling rate, and high cost, which limit its application

Method used

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  • Candle-ash-assisted super-hydrophobic and super-oleophilic oil-water separation mesh film as well as preparation method and application of mesh film
  • Candle-ash-assisted super-hydrophobic and super-oleophilic oil-water separation mesh film as well as preparation method and application of mesh film
  • Candle-ash-assisted super-hydrophobic and super-oleophilic oil-water separation mesh film as well as preparation method and application of mesh film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the superhydrophobic superlipophilic oil-water separation omentum assisted by candle ash described in the present embodiment comprises the following steps:

[0042] 1. Clean the copper mesh with acetone, absolute ethanol and water for 5 minutes, and dry it with compressed nitrogen;

[0043] 2. Weigh 1.4204g of anhydrous sodium sulfate and 1.7048g of copper chloride dihydrate, and prepare 200ml of 0.05mol / L electrolyte solution (the molar concentration of anhydrous sodium sulfate is 0.05mol / L, and the molar concentration of copper chloride dihydrate is 0.05mol / L);

[0044] 3. Place the pretreated copper mesh in the above prepared electrolyte solution, use the platinum sheet as the anode, and the pretreated copper mesh as the cathode, and conduct constant voltage electrodeposition at 0.5V for 6 minutes at a temperature of 25°C;

[0045] 4. Rinse the electrodeposited copper mesh with a large amount of deionized water, and dry it with compressed n...

Embodiment 2

[0054] The preparation method of the superhydrophobic superlipophilic oil-water separation omentum assisted by candle ash described in the present embodiment comprises the following steps:

[0055] 1. Clean the copper mesh with acetone, absolute ethanol and water for 5 minutes, and dry it with compressed nitrogen;

[0056] 2. Weigh 1.4204g of anhydrous sodium sulfate and 1.7048g of copper chloride dihydrate, and prepare 200ml of 0.05mol / L electrolyte solution (the molar concentration of anhydrous sodium sulfate is 0.05mol / L, and the molar concentration of copper chloride dihydrate is 0.05mol / L);

[0057] 3. Place the pretreated copper mesh in the above prepared electrolyte solution, use the platinum sheet as the anode, and the pretreated copper mesh as the cathode, conduct constant voltage electrodeposition at 0.7V for 5 minutes, and the temperature is 30°C;

[0058] 4. Rinse the electrodeposited copper mesh with a large amount of deionized water, and dry it with compressed n...

Embodiment 3

[0063] The preparation method of the superhydrophobic superlipophilic oil-water separation omentum assisted by candle ash described in the present embodiment comprises the following steps:

[0064] 1. Clean the copper mesh with acetone, absolute ethanol and water for 5 minutes, and dry it with compressed nitrogen;

[0065] 2. Weigh 0.7102g of anhydrous sodium sulfate and 0.8524g of copper chloride dihydrate, and prepare 200ml of 0.025mol / L electrolyte solution (the molar concentration of anhydrous sodium sulfate is 0.025mol / L, and the molar concentration of copper chloride dihydrate is 0.025mol / L);

[0066] 3. Place the pretreated copper mesh in the above prepared electrolyte solution, use the platinum sheet as the anode, and the copper mesh as the cathode, conduct constant voltage electrodeposition at 0.8V for 4 minutes, and the temperature is 25°C;

[0067] 4. Rinse the electrodeposited copper mesh with a large amount of deionized water, and dry it with compressed nitrogen;...

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Abstract

The invention discloses a candle-ash-assisted super-hydrophobic and super-oleophilic oil-water separation mesh film as well as a preparation method and an application of the mesh film. According to the method, firstly, a copper wire mesh is pretreated for cleaning and oil removal and blown by compressed nitrogen to be dried; an anhydrous sodium sulfate and copper chloride mixed electrolyte solution is prepared; the pretreated copper wire mesh is placed in the electrolyte solution for constant-voltage cathodic electrodeposition of nano-copper under the voltage of 0.3-1.0 V; the copper wire mesh after electrodeposition is placed in a position 1-4 cm higher than the flame of a burning candle for candle ash deposition, and the oil-water separation mesh film having the super-hydrophobic property is obtained through cooling. The contact angle of the mesh film prepared with the method with water is larger than 153 degrees, the contact angle of the mesh film with oil is smaller than 5 degrees, and the mesh film has the higher high-temperature resistance, the good contact angle stability with acid and alkaline solutions and can be used repeatedly. Compared with traditional oil-water separation films, the oil-water separation mesh film better conforms to the environmental protection concept, can be applied to blockage of offshore oil pollution, chemical sewage treatment and the like, and has the broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic hybrid nano functional materials, and relates to an oil-water separation membrane, in particular to a super-hydrophobic and super-oleophilic oil-water separation omentum assisted by candle ash, a preparation method and application thereof. Background technique [0002] According to reports, about 3.2 billion cubic tons of oil enters the water body every year, forming oily sewage, causing about 38.4 million square kilometers of oil film coverage, and the marine ecosystem is continuously damaged. At the same time, precious oil resources are wasted and directly affect human health and the ecological environment. At present, the commonly used treatment methods for oily wastewater include fence barriers and remediation with common cotton wool and other natural materials, which will cause secondary pollution of oil and more waste of resources. Even chemical decomposing agents and biodegradabl...

Claims

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Application Information

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IPC IPC(8): B01D17/022C02F1/40
Inventor 刘盈曹怀杰陈守刚谷文汉赵明岗
Owner OCEAN UNIV OF CHINA
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