Method for preparing superhydrophobic oil-water separation mesh membrane in one step

An off-grid, super-thin technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of copper mesh surface roughness, expensive fluorine-containing reagents, complex preparation process, etc., and achieve chemical resistance and mechanical Good performance, easy cleaning and storage, and simplified preparation process

Inactive Publication Date: 2019-09-06
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent of CN1721030A discloses a method of utilizing perfluoroalkyl siloxane gel sol to prepare a filter membrane for oil-water separation, but expensive fluorine-containing reagents are required, which is difficult to achieve large-scale application; document Applied Surface Science, 2012, 261, 561 reported a method for preparing super-hydrophobic/super-oleophilic cotton fibers by layer-by

Method used

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  • Method for preparing superhydrophobic oil-water separation mesh membrane in one step
  • Method for preparing superhydrophobic oil-water separation mesh membrane in one step
  • Method for preparing superhydrophobic oil-water separation mesh membrane in one step

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] (1) The 400 mesh copper mesh was ultrasonically cleaned with acetone, ethanol and deionized water for 15 minutes to remove the surface oil, and then the copper mesh was placed in a 6mol / L HCl solution for ultrasonic cleaning for 10 minutes, washed with deionized water, and dried spare;

[0022] (2) Add 0.57g of stearic acid to 100mL of absolute ethanol, dissolve it, put it into the copper mesh treated in step (1), and react at room temperature for 48 hours; take out the omentum, rinse the residual solution on the surface with absolute ethanol, and naturally Drying to obtain the superhydrophobic oil-water separation omentum.

[0023] The scanning electron micrograph of the surface morphology of the superhydrophobic oil-water separation omentum prepared in this example is as follows: figure 1 Shown

[0024] In the air, the contact angle of the superhydrophobic oil-water separation omentum prepared in this example to 5μL of water droplets was 159° (e.g. figur...

Example Embodiment

[0026] Example 2:

[0027] (1) Wash the nickel foam with 0.2mm pore size separately with acetone, ethanol and deionized water for 15 minutes to remove oil on the surface. Then put the nickel foam into a 4mol / L HCl solution for ultrasonic cleaning for 15 minutes, and clean with deionized water. Dry for use;

[0028] (2) Add 0.69g of myristic acid to 60mL of absolute ethanol, dissolve it, put it into the foamed nickel treated in step (1), and react at room temperature for 24 hours; take out the omentum, rinse the residual solution on the surface with absolute ethanol, and naturally Drying to obtain the superhydrophobic oil-water separation omentum.

[0029] In the air, the contact angle of the superhydrophobic oil-water separation membrane prepared in this embodiment to 5 μL of water droplets is greater than 150°;

[0030] use image 3 The shown experimental device performs a separation experiment on the superhydrophobic oil-water separation mesh prepared in this example. Fix the oil...

Example Embodiment

[0031] Example 3:

[0032] (1) Wash the iron foam with 0.1mm pore size separately with acetone, ethanol and deionized water for 15 minutes to remove oil on the surface, and then put the iron foam in a 3mol / L HCl solution for 25 minutes and wash with deionized water. Dry for use;

[0033] (2) Add 1.28g palmitic acid to 50mL absolute ethanol, dissolve it, put it into the foamed iron treated in step (1), and react for 12h at room temperature; take out the omentum and rinse the residual solution on the surface with absolute ethanol. Drying to obtain the superhydrophobic oil-water separation omentum.

[0034] In the air, the contact angle of the superhydrophobic oil-water separation membrane prepared in this embodiment to 5 μL of water droplets is greater than 150°;

[0035] use image 3 The shown experimental device performs a separation experiment on the superhydrophobic oil-water separation mesh prepared in this example. Fix the oil-water separation membrane obtained above in the dev...

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Abstract

The invention belongs to the field of surface modification of solid materials, and particularly relates to a method for preparing a super-hydrophobic oil-water separation mesh membrane in one step. The method comprises the following steps of: putting a pretreated metal mesh membrane into a long-chain alkyl acid ethanol solution, taking out the mesh membrane after reaction at room temperature, cleaning and drying in air to obtain the superhydrophobic oil-water separation mesh membrane. According to the method, the construction of a micro-nano hierarchical structure and the superhydrophobic modification on the surface of the mesh membrane are combined in the same reaction system, the material is cheap and easy to obtain, other strong corrosive, strong redox reagents or toxic modifiers do notneed to be added, the preparation process of a superhydrophobic oil-water separation material is simplified, and the method is environment-friendly, and is suitable for large-scale production. The superhydrophobic oil-water separation mesh membrane has good chemical resistance and mechanical properties, can efficiently separate oily sewage with strongly acidic, strongly alkaline or highly salt components, can be freely cut, can be repeatedly used for many times, and is easy to clean and store.

Description

technical field [0001] The invention belongs to the field of surface modification of solid materials, and in particular relates to a method for preparing a superhydrophobic oil-water separation membrane in one step. Background technique [0002] With the continuous increase of oil exploitation and demand and the deepening of industrialization, it is of great significance to study oil-water separation technology to improve water quality and oil quality. A variety of oil-water separation technologies have been widely developed and researched, especially the oil-water separation based on the super-wetting interface between the material surface and the oil phase and water phase, has become an important way to promote the development of oil-water separation technology. In recent years, inspired by the superhydrophobic phenomenon in nature, researchers have designed a variety of new bionic superhydrophobic separation materials. This superhydrophobic / superoleophilic superwetting pr...

Claims

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Application Information

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IPC IPC(8): B01D17/022C02F1/40
CPCB01D17/0202C02F1/40
Inventor 刘娜赵修松冯红彬王超
Owner QINGDAO UNIV
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