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Multilayer through-hole high-permeability polymer micro-filtration membrane and preparation method thereof

A multi-layer through-hole and polymer technology, applied in the field of membrane materials, can solve the problems of low microfiltration membrane strength, poor permeability, irregular distribution of multi-layer microfiltration membrane through-holes, etc., and achieve strong order , film-making time is short, the effect of improving pollution resistance

Active Publication Date: 2018-11-09
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the irregular distribution of through-holes in the existing multi-layer microfiltration membrane. Although an ordered pore structure can be prepared by using the breath pattern method, the microfiltration membrane with a single-layer pore structure has low strength and poor permeability after long-term use. The problem of providing a multi-layer through-hole high-permeability polymer microfiltration membrane and its preparation method

Method used

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  • Multilayer through-hole high-permeability polymer micro-filtration membrane and preparation method thereof
  • Multilayer through-hole high-permeability polymer micro-filtration membrane and preparation method thereof
  • Multilayer through-hole high-permeability polymer micro-filtration membrane and preparation method thereof

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Embodiment 1

[0036] A two-layer through-hole high-permeability brominated polyphenylene ether microfiltration membrane, comprising a brominated polyphenylene ether microfiltration membrane body, a multi-layer pore structure in the brominated polyphenylene ether microfiltration membrane body, and the pores distributed on the pore wall Silica microspheres with a multi-layer porous structure have a single layer thickness of 4 μm, a pore diameter of 2 μm, and a particle size of the silica microspheres of 30 nm.

[0037] The preparation method of brominated polyphenylene ether microfiltration membrane is:

[0038] 1) Preparation and modification of silica microspheres: Dissolve 40g of ethanol, 3.85ml of 13mol / L ammonia water, and 0.5g of potassium chloride into 0.12g of water, mix evenly, then transfer to a three-necked flask, stir at a constant temperature of 20°C, and Add 40ml of ethanol and 2.1g of TEOS into the beaker, mix them evenly, drop them into the three-neck flask drop by drop with a...

Embodiment 2

[0042] A 3-layer through-hole high-permeability cellulose acetate microfiltration membrane, including a cellulose acetate microfiltration membrane body, a multilayer pore structure in the body, and silica microspheres distributed on the pore wall, the multilayer pore structure is single The layer thickness is 6 μm, the pore size is 1.8 μm, and the particle size of silica microspheres is 40 nm.

[0043] The preparation method of cellulose acetate microfiltration membrane is:

[0044] 1) Preparation and modification of silica microspheres: Dissolve 40g of ethanol, 3.85ml of 13mol / L ammonia water, and 0.5g of potassium chloride into 0.15g of water, mix well and then transfer to a three-necked flask, stir at a constant temperature of 20°C, Add 40ml of ethanol and 2.1g of TEOS into the beaker, mix them evenly, drop them into the three-neck flask drop by drop with a dropper, filter after reacting for 3 hours, centrifuge the filtered solid and wash it with ethanol to obtain a silica ...

Embodiment 3

[0048] A 4-layer through-hole high-permeability polyethylene glycol-modified polystyrene microfiltration membrane, including a polyethylene glycol-modified polystyrene microfiltration membrane body, a multi-layer pore structure in the body, and the pores distributed on the pore wall Silica microspheres with a multi-layer porous structure have a single layer thickness of 8 μm, a pore diameter of 1.6 μm, and a particle size of the silica microspheres of 50 nm.

[0049] The preparation method of polyethylene glycol modified polystyrene microfiltration membrane is:

[0050] 1) Preparation and modification of silica microspheres: 1) Preparation and modification of silica microspheres: dissolve 40g of ethanol, 3.85ml of 13mol / L ammonia water, and 0.5g of potassium chloride into 0.2g of water, mix After uniformity, move it into a three-necked flask, stir at a constant temperature of 20°C, add 40ml of ethanol and 2.1g TEOS to the beaker, mix evenly, drop it into the three-necked flask...

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Abstract

The invention discloses a multilayer through-hole high-permeability polymer micro-filtration membrane. The multilayer through-hole high-permeability polymer micro-filtration membrane comprises a polymer micro-filtration membrane body, a multilayer porous structure in the polymer micro-filtration membrane and silicon dioxide microspheres distributed on the hole walls, wherein the micro-filtration membrane has a two-layer, three-layer or four-layer multilayer porous structure by utilizing a breath pattern method and controlling different process parameters. The multilayer through-hole high-permeability polymer micro-filtration membrane has the beneficial effects that the polymer micro-filtration membrane has the multilayer porous structure, the through holes are regularly and densely distributed, the aperture is uniform, the orderness is high, the thickness of the hole wall is moderate, the structure is stable, and the mechanical performance of the micro-filtration membrane can be greatly improved; and the modified silicon dioxide microspheres are uniformly distributed on the hole wall of the micro-filtration membrane, and the silicon dioxide has high hydrophilic performance, so thatthe hydrophilic performance of the polymer micro-filtration membrane can be improved, the layer number and the permeability of the micro-filtration membrane can be improved, and the polymer micro-filtration membrane is better in separation capability.

Description

technical field [0001] The invention relates to the field of membrane materials, in particular to a multilayer through-hole high-permeability polymer microfiltration membrane and a preparation method thereof. Background technique [0002] Membrane separation technology is widely used in high-efficiency catalysis, life science, environmental governance and other fields, and is one of the research hotspots in the world today. Membrane separation technology with high-efficiency decontamination performance has broad application prospects in drinking water treatment. Membrane separation technology can remove odor, color, disinfection by-product precursors, microorganisms and some organic substances in water. Microfiltration membrane can intercept particles, colloids and pathogenic microorganisms in sewage, which is an essential key technology in the water treatment process. Therefore, the preparation of a high-permeability, high-strength microfiltration membrane is of great sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/16B01D71/52B01D71/76B01D67/00
CPCB01D67/0079B01D71/16B01D71/52B01D71/76
Inventor 袁华赵延坤张安康李广振丛海林于冰
Owner QINGDAO UNIV
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