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Preparation method of superhydrophobic woven fabric for oil-water separation

An oil-water separation and super-hydrophobic technology, which is applied in the direction of separation methods, filtration separation, chemical instruments and methods, etc., can solve the problems of poor stability of super-hydrophobic substrates, cannot be used repeatedly, and does not have universal applicability, so as to increase roughness , easy to operate, realize the effect of oil-water separation

Active Publication Date: 2013-06-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the technical solutions here all have the effect of oil-water separation, there are also disadvantages, such as complicated preparation methods, poor stability of the prepared superhydrophobic substrate, which cannot be used repeatedly, or use of metal mesh as the substrate, which is costly and does not have general Suitability etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of superhydrophobic woven fabric for oil-water separation
  • Preparation method of superhydrophobic woven fabric for oil-water separation
  • Preparation method of superhydrophobic woven fabric for oil-water separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At room temperature, a commercially available woven cloth of 5 cm × 5 cm was immersed in Fe with an average particle size of 40 nm. 3 o 4 After 5 minutes in the nanoparticle aqueous solution, the cloth was taken out, washed with water, and dried at 80° C. for several minutes. The dried modified Fe 3 o 4 The woven fabric of nanoparticles was immersed in 5mmol / L octadecyl mercaptan, and reacted at room temperature for 24h. After the reaction, the woven fabric is taken out, washed with absolute ethanol to remove unloaded stearyl mercaptan, and finally the woven fabric is dried to obtain the superhydrophobic woven fabric of the present invention.

[0031] The scanning electron micrographs of the superhydrophobic woven fabric before surface modification (a, b) and after surface modification (c, d) are as follows figure 1 As shown, the surface of the woven fabric changed from smooth before modification to rough after modification.

[0032] The static contact angle photos...

Embodiment 2

[0037] At room temperature, immerse a commercially available fabric of 5 cm x 5 cm in an aqueous solution containing FeO nanoparticles with an average particle size of 30 nm, take out the fabric after 10 minutes, wash it with water, and dry the fabric at 70 °C a few minutes. Then the dried woven fabric modified with FeO nanoparticles was immersed in 10 mmol / L octadecyl mercaptan, and reacted at room temperature for 24 h. After the reaction, the fabric was taken out, washed with ethanol to remove the unloaded stearyl mercaptan, and finally the fabric was dried to obtain a superhydrophobic fabric.

[0038] The contact angle between the superhydrophobic woven fabric and water is 158.2°, showing good superhydrophobic properties. The superhydrophobic woven fabric is used in the filter layer, which can realize rapid and efficient separation of oil-water mixture, and is resistant to high temperature and washing.

Embodiment 3

[0040]At room temperature, a commercially available fabric of 5 cm × 5 cm was immersed in an aqueous solution containing CoO nanoparticles with an average particle size of 50 nm, and the fabric was taken out for 15 minutes, washed with water, and then dried at 60 °C for several days. minute. Then the dried woven fabric modified with CoO nanoparticles was immersed in 20 mmol / L cetyl mercaptan, and reacted at room temperature for 12 h. After the reaction, the woven fabric was taken out, washed with ethanol to remove cetyl mercaptan that could not be loaded, and finally the woven fabric was put into an oven to dry to obtain a superhydrophobic woven fabric.

[0041] The superhydrophobic woven fabric has a contact angle of 156.1° with water, exhibits good superhydrophobic properties, can realize rapid and efficient separation of oil-water mixtures, and is resistant to high temperature and washing.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a preparation method of superhydrophobic woven fabric for oil-water separation. According to the preparation method disclosed by the invention, transition metal nanoparticles are modified on the surface of woven fabric, the obtained woven fabric has special properties endowed by a transition metal, for example, the superhydrophobic woven fabric modified by Fe3O4 has magnetism, the superhydrophobic woven fabric modified by Ag has good antibacterial performance and excellent superhydrophobic property, the contact angle with water is larger than 150 degrees, the rolling angle is smaller than 10 degrees, and the superhydrophobic woven fabric has high temperature resistance, washing resistance and permanent superhydrophobic property, and can be successfully applied to oil-water separation.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic woven fabric for oil-water separation. It belongs to the technical field of functional materials. Background technique [0002] Superhydrophobicity is a peculiar phenomenon existing in nature. The surfaces of lotus leaves and goose feathers are naturally superhydrophobic, and water droplets can roll freely on lotus leaves and goose feathers. We define superhydrophobicity as the contact angle of water on the surface of the material exceeds 150 degrees. At present, it has been confirmed that two main factors are generally required to achieve superhydrophobic properties on the surface of materials: one is to adjust the micro / nano structure of the material surface and increase the roughness of the material surface; the other is to modify the surface with a certain roughness. Low surface energy substances . Superhydrophobic surfaces have a wide range of applications in surface self-clean...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/49D06M11/42D06M11/83D06M13/252D06M13/265B01D39/08B01D17/02
Inventor 郭志光李静董莹石雷
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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