A kind of multi-layer through-hole high permeability polymer microfiltration 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 and service life

Active Publication Date: 2021-04-27
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of multi-layer through-hole high permeability polymer microfiltration membrane and preparation method thereof
  • A kind of multi-layer through-hole high permeability polymer microfiltration membrane and preparation method thereof
  • A kind of multi-layer through-hole high permeability polymer microfiltration membrane and preparation method thereof

Examples

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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 walls 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 ...

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 microfiltration membrane, which comprises a polymer microfiltration membrane body, a multilayer pore structure in the polymer microfiltration membrane body, and silicon dioxide microfiltration membranes distributed on the pore walls. Ball, using the breath pattern method in combination with controlling different process parameters to make the microfiltration membrane have a 2-layer, 3-layer or 4-layer multilayer pore structure; the beneficial effect of the present invention is: the polymer microfiltration membrane of the present invention has a multilayer pore structure , the distribution of through holes is regular and tight, the pore size is uniform, the order is strong, the thickness of the pore wall is moderate, and the structure is stable, which can greatly increase the mechanical properties of the microfiltration membrane. Modified silica microspheres are evenly distributed on the pore wall of the microfiltration membrane. Silica has strong hydrophilicity, which can enhance the hydrophilicity of the polymer microfiltration membrane, increase the number of layers and permeability of the microfiltration membrane, so that the polymer microfiltration membrane of the present invention has better separation ability.

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 Patents(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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