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A superhydrophobic modification method of mesoporous polycarbonate/silica composite membrane

A technology of superhydrophobic modification and silicon dioxide membrane, which is applied in chemical instruments and methods, separation methods, grease/oily substances/suspton removal devices, etc., and can solve problems such as limited applications, poor hydrophobicity, and insufficient hydrophobicity , to achieve the effect of improving the hydrophobic performance

Active Publication Date: 2021-02-12
广东南联科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the mesoporous membrane is that the hydrophobic performance is not excellent enough
[0007] In summary, organic / inorganic composite mesoporous membranes in the prior art have the disadvantage of poor hydrophobicity, which limits their application in the field of oil-water separation. Therefore, an organic / inorganic composite mesoporous membrane with excellent hydrophobic properties is developed , is of great significance

Method used

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  • A superhydrophobic modification method of mesoporous polycarbonate/silica composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add ethyl orthosilicate, γ-aminopropyltriethoxysilane, and γ-aminopropyltrimethoxysilane to deionized water / ethanol mixed solvent, then add ammonia water as a catalyst, and add triblock The surfactant is used as a structure-directing agent to prepare a precursor solution; the three-block surfactant is polyvinyl ether-polypropylene ether-polyvinyl ether tri-block copolymer; in the precursor solution, 24 wt. parts, 5 parts by weight of γ-aminopropyltriethoxysilane, 5 parts by weight of γ-aminopropyltrimethoxysilane, 36 parts by weight of deionized water, 24 parts by weight of ethanol, 3 parts by weight of ammonia water, triblock surface 3 parts by weight of active agent;

[0033] (2) Immerse the polycarbonate mesoporous tubular membrane in the precursor solution prepared in step (1), and induce the self-assembly of the structure-directing agent through the evaporation of the solvent, and promote the hydrolysis of the silicon source. A silicon dioxide film layer is fo...

Embodiment 2

[0037] (1) Add ethyl orthosilicate, γ-aminopropyltriethoxysilane, and γ-aminopropyltrimethoxysilane to deionized water / ethanol mixed solvent, then add ammonia water as a catalyst, and add triblock The surfactant is used as a structure-directing agent to prepare a precursor solution; the three-block surfactant is polyvinyl ether-polypropylene ether-polyvinyl ether tri-block copolymer; in the precursor solution, 23 wt. 4 parts by weight, 4 parts by weight of γ-aminopropyltriethoxysilane, 4 parts by weight of γ-aminopropyltrimethoxysilane, 41 parts by weight of deionized water, 23 parts by weight of ethanol, 3 parts by weight of ammonia water, triblock surface 2 parts by weight of active agent;

[0038] (2) Immerse the polycarbonate mesoporous tubular membrane in the precursor solution prepared in step (1), and induce the self-assembly of the structure-directing agent through the evaporation of the solvent, and promote the hydrolysis of the silicon source. A silicon dioxide film...

Embodiment 3

[0042] (1) Add ethyl orthosilicate, γ-aminopropyltriethoxysilane, and γ-aminopropyltrimethoxysilane to deionized water / ethanol mixed solvent, then add ammonia water as a catalyst, and add triblock The surfactant is used as a structure-directing agent to prepare a precursor solution; the three-block surfactant is polyvinyl ether-polypropylene ether-polyvinyl ether tri-block copolymer; in the precursor solution, 28 wt. parts, 5 parts by weight of γ-aminopropyltriethoxysilane, 5 parts by weight of γ-aminopropyltrimethoxysilane, 27 parts by weight of deionized water, 28 parts by weight of ethanol, 4 parts by weight of ammonia water, triblock surface 3 parts by weight of active agent;

[0043] (2) Immerse the polycarbonate mesoporous tubular membrane in the precursor solution prepared in step (1), and induce the self-assembly of the structure-directing agent through the evaporation of the solvent, and promote the hydrolysis of the silicon source. A silicon dioxide film layer is fo...

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Abstract

The invention belongs to the technical field of separation and purification membrane materials, and provides a superhydrophobic modification method of a mesoporous polycarbonate / silicon dioxide composite membrane. In this method, the PC mesoporous tubular membrane is used as a hard template, and amino-modified SiO is formed on the inner wall of the PC tubular membrane by evaporation-induced self-assembly. 2 membrane layer, and then make a composite mesoporous membrane of SiO 2 The inner layer and the outer layer of PC adsorb cellulose acetate, and then pass through trifluoromethanesulfonyl chloride gas to react, and the surface of the PC film layer and SiO 2 Film Surface Graft-CF 3 groups to achieve superhydrophobic modification of composite mesoporous membranes. Compared with the traditional method, the modification method of the present invention can significantly improve the SiO content of the inner layer of the composite mesoporous membrane. 2 The hydrophobic performance of the membrane and the outer PC membrane, the modified composite mesoporous membrane can be used for the treatment of oily sewage and the treatment of offshore oil pollution.

Description

technical field [0001] The invention belongs to the technical field of separation and purification membrane materials, and provides a superhydrophobic modification method of a mesoporous polycarbonate / silicon dioxide composite membrane. Background technique [0002] Drug sustained release, kidney dialysis membranes, gas separation and enrichment, seawater desalination, sewage treatment, azeotrope separation, food processing and other research and application hotspots are all inseparable from high-level separation technology. Traditional separation techniques mainly include precipitation, filtration, recrystallization, sieving, evaporation, ion exchange, etc. However, these technologies are accompanied by a large amount of energy consumption. Membrane separation technology is a new type of high-efficiency separation technology that has been developed unprecedentedly in the past ten years. It is recognized as a "green technology" because of its advantages such as low energy c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/40C08J5/18C02F1/40B01D17/022C08L69/00C08L1/12
CPCB01D17/0202C02F1/40C08J5/18C08J9/40C08J9/42C08J2369/00C08J2401/12C08K3/36
Inventor 蔡露
Owner 广东南联科技股份有限公司