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High-dielectric-constant micro-filtration and ultra-filtration membrane and preparation method thereof

A high dielectric constant, ultrafiltration membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of separation performance degradation, reduced membrane service life, and restrictions on the application of water treatment, to achieve The modification method is simple, prolongs the service life, improves the flux and the effect of the produced water quality

Inactive Publication Date: 2016-11-23
INNER MONGOLIA TIANYI ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Membrane fouling is a major obstacle restricting the popularization and application of membrane technology
When filtering pollutants in water, the pollutants are easily adsorbed on the surface of the membrane and in the pores of the membrane, resulting in a decrease in the separation performance of the membrane, reducing the service life of the membrane, and restricting its application in the field of water treatment.

Method used

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  • High-dielectric-constant micro-filtration and ultra-filtration membrane and preparation method thereof
  • High-dielectric-constant micro-filtration and ultra-filtration membrane and preparation method thereof
  • High-dielectric-constant micro-filtration and ultra-filtration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high dielectric constant micro-ultrafiltration membrane, which contains calcium copper titanate and polyvinylidene fluoride.

[0035] The composition and the weight and number ratio of the raw material of the micro-ultrafiltration membrane are:

[0036]

[0037]

[0038] A high dielectric constant micro-ultrafiltration membrane, the preparation method of which is:

[0039] 1) Modifier preparation: vacuum-dry copper calcium titanate at 150° C. for 24 hours, and collect the dried copper calcium titanate.

[0040] 2) Preparation of casting solution: Take 0.1Kg of calcium copper titanate, dissolve it in 7.8Kg of N-methylpyrrolidone, oscillate for 5 hours with ultrasonic waves, and then heat and stir for 6 hours until it is completely dissolved. Then add 1.8Kg of polyvinylidene fluoride, 0.3Kg of organosilane, and 0.8Kg of polyvinylpyrrolidone 90 in sequence, heat and stir at 60°C for 24 hours, and let it stand for defoaming to obtain a homogeneous casting solution;...

Embodiment 2

[0045] A high dielectric constant micro-ultrafiltration membrane, which contains calcium copper titanate and polyvinylidene fluoride.

[0046] The composition and the weight and number ratio of the raw material of the micro-ultrafiltration membrane are:

[0047]

[0048] A high dielectric constant micro-ultrafiltration membrane, the preparation method of which is:

[0049] 1) Modifier preparation: vacuum-dry copper calcium titanate at 150° C. for 24 hours, and collect the dried copper calcium titanate.

[0050] 2) Preparation of casting solution: Take 0.15Kg of calcium copper titanate, dissolve it in 6.95Kg of N-methylpyrrolidone, oscillate for 5 hours with ultrasonic waves, and then heat and stir for 6 hours until it is completely dissolved. Then add 1.8Kg of polyvinylidene fluoride, 0.6Kg of organosilane, and 0.5Kg of polyvinylpyrrolidone 90 in sequence, heat and stir at 60°C for 24 hours, and let it stand for defoaming to obtain a homogeneous casting solution;

[0051]...

Embodiment 3

[0055] A high dielectric constant micro-ultrafiltration membrane, which contains calcium copper titanate and polyvinylidene fluoride.

[0056] The composition and the weight and number ratio of the raw material of the micro-ultrafiltration membrane are:

[0057]

[0058] A high dielectric constant micro-ultrafiltration membrane, the preparation method of which is:

[0059] 1) Modifier preparation: vacuum-dry copper calcium titanate at 150° C. for 24 hours, and collect the dried copper calcium titanate.

[0060] 2) Preparation of casting solution: Take 0.1Kg of calcium copper titanate, dissolve it in 6.4Kg of N-methylpyrrolidone, oscillate for 5 hours with ultrasonic waves, and then heat and stir for 6 hours until it is completely dissolved. Add 1.8Kg of polyvinylidene fluoride, 0.8Kg of organosilane, and 0.8Kg of polyvinylpyrrolidone 90 in sequence, heat and stir at 60°C for 24 hours, and let it stand for defoaming to obtain a homogeneous casting solution;

[0061] 3) Fil...

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Abstract

The invention relates to a high-dielectric-constant micro-filtration and ultra-filtration membrane. The micro-filtration and ultra-filtration membrane comprises a high-dielectric-constant modification agent and a membrane material. The weight percentage of the high-dielectric-constant modification agent and the membrane material is 1-25%. A preparation method of the high-dielectric-constant micro-filtration and ultra-filtration membrane includes the steps of preparation of the modification agent, preparation of a membrane casting solution, membrane forming and curing. According to the high-dielectric-constant micro-filtration and ultra-filtration membrane and the preparation method, the dielectric constant of the micro-filtration and ultra-filtration membrane can be well improved by adding the high-dielectric-constant modification agent; the anti-fouling performance of the micro-filtration and ultra-filtration membrane can be obviously improved by combining the modification agent with a unique DEP power source of the company; under the action of dielectric electrophoresis, pollutants will be enriched around the electric field and not be adsorbed to the surface of the micro-filtration and ultra-filtration membrane, so the flux of the micro-filtration and ultra-filtration membrane and quality of produced water are greatly improved. Raw materials of the membrane are easy to prepare, the modification method is simple, and industrial production and application are easy.

Description

technical field [0001] The invention relates to the technical field of membrane material preparation and modification, in particular to a high dielectric constant micro-ultrafiltration membrane and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) is a thermoplastic semi-crystalline high polymer, which is formed by the copolymerization of vinylidene fluoride homopolymer or vinylidene fluoride and hexafluoropropylene. Polyvinylidene fluoride (PVDF) material itself has the advantages of high mechanical strength, corrosion resistance, oxidation resistance, stable chemical properties, and safe use, and is a membrane material with excellent performance. Compared with polymer organic membrane materials such as polyvinyl chloride (PVC), high-density polyethylene (HDPE), polypropylene (PP) and polyethersulfone (PES), no matter in terms of acid and alkali resistance, oxidation resistance and resistance In terms of organic solvents, the tolera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D71/02B01D71/34B01D67/00
Inventor 王冰盛晓颖郑贵堃靳治国梁素艳胡海霞
Owner INNER MONGOLIA TIANYI ENVIRONMENTAL TECH
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