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High-performance hybrid separation membrane and preparation method thereof

A separation membrane, high-performance technology, applied in the field of separation membrane, can solve the problems of uneven dispersion and easy falling off of nanomaterials, and achieve the effect of simplifying the membrane modification process, strong universality, and easy industrialization

Active Publication Date: 2013-12-25
山东净泽膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of uneven dispersion and easy fall-off of nanomaterials in the prior art, to provide a high-performance hybrid separation membrane with uniform dispersion of nanomaterials and not easy to fall off. At the same time, the separation can be improved by changing the type of nanomaterials Hydrophilicity, roughness, anti-pollution ability of the membrane surface and membrane pore surface, or enhance the biocompatibility, antibacterial, catalytic and other properties of the material, or endow the material with new electrical, optical, thermodynamic and other properties and enhance the mechanical strength

Method used

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  • High-performance hybrid separation membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-4

[0031] The preparation method of the nanocomposite polymer film of the present embodiment is carried out according to the following steps:

[0032] (1) Add 5 parts of polyethersulfone, 0.1 part of nano-titanium dioxide, 0.5 part of dopamine and 20 parts of N,N-dimethylformamide into the dissolution tank, and add them at different temperatures (25°C, 45°C, ℃, 65℃, 85℃), stirring and dissolving for 2 hours, standing for defoaming for 4 hours, and making a casting solution;

[0033] (2) Adjust the pH of the water and isopropanol coagulation bath to 8.0 by adding phosphate buffer;

[0034] (3) cast the casting solution on a flat plate to form a liquid film, and then soak it in a coagulation bath for 30 minutes to obtain a nanomaterial-doped polymer flat film;

[0035] (4) Soak the separation membrane prepared in step (3) in 15% Tween-20 aqueous solution for 50 minutes, and then dry it to assemble the membrane module.

Embodiment 5-9

[0037] The preparation method of the nanocomposite polymer film of the present embodiment is carried out according to the following steps:

[0038] (1) 20 parts by weight, 30 parts, 40 parts, 50 parts and 60 parts of polyethylene material, 3 parts of carbon nanotubes, 10 parts of 3,4-dihydroxybenzaldehyde and 80 parts by weight of Add ethanol into the dissolving tank, stir and dissolve for 12 hours under the condition of 100°C, and let it stand for defoaming for 8 hours to make a casting solution;

[0039] (2) Add 5 parts of hydrogen peroxide to the aqueous coagulation bath containing 3% N,N-dimethylformamide and N-methylpyrrolidone;

[0040] (3) The casting solution is spun on a hollow fiber membrane spinning machine, and then soaked in a coagulation bath for 12 hours to obtain a hollow fiber membrane;

[0041] (4) The separation membrane prepared in step (3) was soaked in 40% glycerol aqueous solution for 3 hours, and then dried to assemble the membrane module.

Embodiment 10-13

[0043] The preparation method of the nanocomposite polymer film of the present embodiment is carried out according to the following steps:

[0044] (1) Divide the weight into 10 parts of chitosan, 30 parts of different nanomaterials (montmorillonite, cumulated clay, silver nanoparticles, titanium nanorods), 1 part of 3,4-dihydroxyphenylacetic acid and Add 60 parts of pure water into the dissolution tank, stir and dissolve for 48 hours under the condition of 30°C, and let it stand for defoaming for 24 hours to make a casting solution;

[0045] (2) Add 2 parts of phenol to the pure water coagulation bath;

[0046] (3) The casting liquid is spun on a hollow fiber membrane spinning machine, and then soaked in a coagulation bath for 48 hours to obtain a hollow fiber membrane;

[0047] (4) Soak the separation membrane prepared in step (3) in 15% Tween-80 aqueous solution for 24 hours, and then dry it to assemble the membrane module.

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Abstract

The invention provides a high-performance hybrid separation membrane and a preparation method thereof. The interior of a matrix material of the separation membrane, the surface of the separation membrane and the surfaces of membrane pores all contain a poly-o-phenylenediquinone compound produced after oxidation of a pyrocatechol compound and cross-linked, cured and uniformly dispersed nano-materials. The preparation method comprises the following steps: adding a pyrocatechol derivative into a membrane-casting blended solution of the nano-materials and a polymer to promote bonding of the nano-materials and the polymer; and oxidizing the pyrocatechol compound into the poly-o-phenylenediquinone compound in the processes of phase inversion and film formation so as to realize cross-linking and curing of the nano-materials and dispersion of the nano-materials in the polymer matrix. The method comprises the concrete steps of preparation of the membrane-casting solution, blending of a coagulation bath, film formation and curing and / or modification.

Description

technical field [0001] The invention relates to the technical field of separation membranes, in particular to a high-performance hybrid separation membrane and a preparation method thereof. Background technique [0002] The extreme scarcity of fresh water resources, the rapid expansion of the energy gap and the increasingly serious environmental pollution are important bottlenecks restricting the healthy and sustainable development of human civilization today. As a new high-efficiency separation technology, membrane separation technology is regarded as one of the sunrise industries with the most development potential in the 21st century, and has been widely used in chemical industry, environmental protection, electronics, light industry, textile, petroleum, food, medicine, Various fields such as biotechnology and energy engineering. Due to its unique structure, separation membranes have emerged in environmental protection and water resource regeneration, and have broad appl...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/26B01D71/38B01D71/08B01D69/12B01D67/00
Inventor 胡云霞徐卫星
Owner 山东净泽膜科技有限公司
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