Organic-inorganic ultrafiltration composite membrane and preparation method thereof

An ultrafiltration composite membrane, inorganic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The problem is to achieve the synergistic enhancement of mechanical properties and anti-pollution properties, enhance anti-pollution properties, and improve mechanical properties and anti-pollution properties.

Inactive Publication Date: 2014-01-01
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of these materials to modify the polymer ultrafiltration membrane can increase the permeation flux of the membrane and greatly improve the functional performance, however, these methods also have some shortcomings, mainly in: (1) The relationship between the modified material and the polymerization The weak interfacial bonding between the substrates in

Method used

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  • Organic-inorganic ultrafiltration composite membrane and preparation method thereof
  • Organic-inorganic ultrafiltration composite membrane and preparation method thereof
  • Organic-inorganic ultrafiltration composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 0.075g of γ-aminopropyltriethoxysilane functionalized graphene oxide was ultrasonically dispersed in 84g of NN dimethylacetamide as a solvent. After 2h, 15g of polyvinylidene fluoride and 1g of polyvinylpyrrolidone as a porogen were added. , Then heat and stir in a 450℃ water bath for 24h, stand still for 24h, use a self-made scraper to control a certain liquid film thickness and scrape the film on a clean glass plate, pre-evaporate for 30 seconds, immerse in deionized water to solidify, and repeat The water is changed to remove the solvent and the porogen, and finally the silane-functionalized graphene oxide modified organic-inorganic ultrafiltration composite membrane can be produced.

[0018] The above-mentioned organic-inorganic ultrafiltration composite membrane was soaked in deionized water for 3 days, and then the mechanical strength and anti-fouling performance of the ultrafiltration composite membrane were tested by a mechanical stretching device and a permeation f...

Embodiment 2

[0020] 0.15g γ-aminopropyltriethoxysilane functionalized graphene oxide was ultrasonically dispersed in 83g NN dimethylacetamide, 15g polyacrylonitrile and 1g polyvinylpyrrolidone were added after 1h, and then heated in a water bath at 50℃ Stir for 30h, let stand for 24h, use a self-made scraper to control a certain liquid film thickness and scrape the film on a clean glass plate, pre-evaporate for 30 seconds, immerse in deionized water for solidification, and repeatedly change the water to remove the solvent and porogen , And finally the silane functionalized graphene oxide modified organic-inorganic ultrafiltration composite membrane can be made.

[0021] The above-mentioned organic-inorganic ultrafiltration composite membrane was soaked in deionized water for 4 days, and then the mechanical strength and anti-pollution performance of the ultrafiltration composite membrane were tested by a mechanical stretching device and a permeation filtration device. The results showed that th...

Embodiment 3

[0023] 0.1g γ-aminopropyltriethoxysilane functionalized graphene oxide was ultrasonically dispersed in 77g NN dimethylacetamide, 20g polysulfone and 3g polyvinylpyrrolidone were added after 2h, and then heated and stirred in a water bath at 40℃ 20h, let it stand for 30h, use a self-made scraper to control a certain liquid film thickness and scrape the film on a clean glass plate. After pre-evaporating for 30 seconds, it is immersed in deionized water to solidify, and the water is changed repeatedly to remove the solvent and porogen. Finally, the silane-functionalized graphene oxide modified organic-inorganic ultrafiltration composite membrane can be produced.

[0024] The above-mentioned organic-inorganic ultrafiltration composite membrane was soaked in deionized water for 4 days, and then the mechanical strength and anti-pollution performance of the ultrafiltration composite membrane were tested by a mechanical stretching device and a permeation filtration device. The results sho...

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Abstract

The invention relates to an organic-inorganic ultrafiltration composite membrane and a preparation method thereof. The organic-inorganic ultrafiltration composite membrane comprises the following components in parts by weight: 15-20 parts of polymer resin, silane functionalized graphene oxides, 75-90 parts of N-N dimethyl acetamide and 1-3 parts of polyvinyl pyrrolidone, wherein the silane functionalized graphene oxides account for 0.02%-2.0% of the polymer resin. According to the invention, a membrane preparation process is simple and easy to realize; the silane functionalized graphene oxides are well dispersed to polymeric matrix through ultrasonic and mechanical stirring; the silane functionalized graphene oxides can be well dispersed in the polymeric matrix due to superhigh combination property, superhigh specific surface and more surface long polymer chains between the silane functionalized graphene oxides and the polymeric matrix; in addition, abundant oxygen-containing functional groups positioned on the surfaces of the silane functionalized graphene oxides can well enhance the hydrophilicity of the ultrafiltration composite membrane so as to synergically improve the mechanical property and pollution resistant property of the ultrafiltration composite membrane.

Description

Technical field [0001] The invention belongs to the technical field of functional modification of ultrafiltration membranes, and particularly relates to a silane functionalized graphene oxide modified organic-inorganic ultrafiltration composite membrane and a preparation method thereof. Background technique [0002] As a kind of ultrafiltration membrane material with excellent comprehensive performance, organic polymer has good chemical stability, thermal stability and porosity, but because of its low surface energy and strong hydrophobicity, it is easy to cause surface pollution. Thus seriously affecting the performance of the product. In recent years, in view of the pollution problem of polymer ultrafiltration membranes, the research on its hydrophilic blending modification has gradually been active. The reported modified materials mainly include SiO 2 , Fe 2 O 3 , Al 2 O 3 , TiO 2 And low-dimensional carbon nanomaterials such as oxidized carbon nanotubes and inorganic material...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D71/42B01D71/68B01D71/54B01D69/12B01D67/00
Inventor 徐志伟张继国陈磊吴腾飞周宝明李英琳李宝东吕汉明
Owner TIANJIN POLYTECHNIC UNIV
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