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Method for preparing metal mesh for oil-water separation

A technology of oil-water separation and metal mesh, which is applied in separation methods, filtration separation, liquid separation, etc., can solve the problems of cumbersome preparation process, poor stability of separation mesh, environmental pollution, etc., achieve simple equipment and preparation process, and good oil-water separation effect , The effect of cheap and easy-to-obtain raw materials

Inactive Publication Date: 2010-05-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The preparation process is cumbersome, time-consuming and energy-consuming
Not suitable for large area preparation and industrial production
[0009] 2. The use of fluorine-containing low surface energy substances increases costs and pollutes the environment
[0010] 3. The prepared separation net has poor stability

Method used

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  • Method for preparing metal mesh for oil-water separation
  • Method for preparing metal mesh for oil-water separation
  • Method for preparing metal mesh for oil-water separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 50mL of hydrochloric acid solution with a concentration of 3mol / L into a 100mL beaker, soak the metal iron mesh with a pore size of 160 mesh in this solution for 50 seconds, take it out, wash it with water and dry it. Nanoscale protrusions appear on the surface of the metal mesh, such as figure 1 shown.

[0028] (2) Add 30mL of ethanol and 0.003mol of cetyl mercaptan into a 100mL beaker, mix well, and prepare an ethanol solution with a concentration of 0.1mol / L. Soak the above-mentioned acid-treated metal iron net in this solution for 50 minutes, take it out, wash it with ethanol, and blow dry. That is, the oil-water separation metal mesh is obtained, such as figure 1 shown.

[0029] (3) On the surface of the metal mesh, the contact angle of water is 155° and the rolling angle is less than 5°, while the contact angle of oil on its surface is close to 0°, as figure 2 a. figure 2 b and figure 2 as shown in c. Cover the metal mesh on the mouth of the test...

Embodiment 2

[0032] (1) Add 50mL of nitric acid solution with a concentration of 4mol / L into a 100mL beaker, soak the metal copper mesh with a pore size of 100 mesh in this solution for 4 minutes, take it out, wash it with water and dry it.

[0033] (2) Add 50mL of ethanol and 0.01mol of sodium dodecylsulfonate into a 100mL beaker, mix well, and prepare an ethanol solution with a concentration of 0.2mol / L. Soak the acid-treated metal copper mesh in this solution for 100 minutes, take it out, wash it with ethanol, and blow dry.

[0034] (3) On the surface of the metal mesh, the contact angle of water is 152° and the rolling angle is less than 5°, while the contact angle of oil on the surface is close to 0°. The metal mesh can separate the oil-water mixture.

Embodiment 3

[0036](1) Add 50mL of hydrochloric acid solution with a concentration of 2.5mol / L into a 100mL beaker, soak the metal zinc mesh with a pore size of 120 mesh in this solution for 3 minutes, take it out, wash it with water and dry it.

[0037] (2) Add 50mL ethanol and 0.01mol sodium hexadecyl carboxylate into a 100mL beaker, mix well, and prepare an ethanol solution with a concentration of 0.5mol / L. Soak the acid-treated metal zinc mesh in this solution for 120 minutes, take it out, wash it with ethanol, and blow dry.

[0038] (3) On the surface of the metal mesh, the contact angle of water is 150° and the rolling angle is less than 5°, while the contact angle of oil on the surface is close to 0°. The metal mesh can separate the oil-water mixture.

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Abstract

The invention belongs to the technical field of chemistry and chemical industry and functional materials, and relates to a method for preparing a metal mesh which has special wetting properties and is used for oil-water separation. The method adopts simple wet-method chemical etching technology, nano-scale microscopic bulges are prepared on the surface of a metal mesh with micron-grade pore diameters, and then a compound which does not contain fluorine and has low surface energy is modified on the surfaces of the microscopic bulges. For the surface of the prepared material, a contact angle of a water drop is more than 150 degrees, and a contact angle of oil is close to 0 degree. Due to the specific wetting properties, the material can allow the oil to pass through the metal mesh smoothly, but the water cannot permeate through the metal mesh completely, so that the property of effectively separating oil-water mixtures is realized. Particularly, the specific wetting properties of the surface of the material can keep stable in acid solution, alkali solution and salt solution, and thus the functional metal mesh can be excellently applied in aspects of metal corrosion prevention and the like. A mesh membrane does not contain the fluorine, and has the advantages of simple preparation method, high permeability of pore space and good oil-water separation effect, and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and functional materials, and in particular relates to a metal net with special wetting property, which can be used to separate oil-water mixture. Background technique [0002] Oil-water separation is a century-old topic. For a long time, the water and impurities in the oil have seriously affected the quality of the oil. Therefore, finding a simple and efficient method to remove water from oil has become an important issue. [0003] The emergence of self-cleaning nano-interface materials provides a new way to solve this problem. Self-cleaning material means that the contact angle of water on its surface is greater than 150°, while the rolling angle of water is less than 5°. This means that water is not stable on its surface but slides off quickly. If the contact angle of oil droplets on its surface is less than 5°, this nano-interface material can effectively achieve oil-water sepa...

Claims

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Application Information

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IPC IPC(8): B01D17/022B01D39/12
Inventor 林权王传洗姚同杰马骋杨柏崔占臣董凤霞
Owner JILIN UNIV
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