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Preparation method of polymer micro-filtration membrane

A microfiltration membrane and polymer technology, applied in the field of membrane separation, can solve the problems of uncontrollable pore size and pore density of microfiltration membranes

Active Publication Date: 2015-01-28
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pore size and pore density of the microfiltration membrane prepared by the above method cannot be controlled.

Method used

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  • Preparation method of polymer micro-filtration membrane
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  • Preparation method of polymer micro-filtration membrane

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preparation example Construction

[0029] The invention provides a kind of preparation method of polymer microfiltration membrane, comprises the following steps:

[0030] A) Under the action of an initiator, a sulfonic acid monomer containing a double bond undergoes a polymerization reaction in an organic solution containing polyarylether sulfone ketone to obtain the first reaction mixture; the polyarylether sulfone ketone is dinitrogen-containing Polyaryl ether sulfone ketones of xinhones;

[0031] B) raising the temperature of the first reaction mixture to undergo a crosslinking reaction to obtain a second reaction mixture;

[0032] C) performing membrane-forming treatment on the second reaction mixture to obtain a polymer microfiltration membrane.

[0033] The present invention uses sulfonic acid monomers containing double bonds, phthalazinone-containing polyaryl ether sulfone ketones, and initiators as raw materials to undergo polymerization reactions in organic solvents to obtain the first reaction mixtur...

Embodiment 1

[0054] Put 15.06g of 1-methyl-2-pyrrolidone (NMP) into a three-necked flask, and then add 1.0mmol of styrenesulfonic acid (SSH) and 10.0mmol of polyarylethersulfoneketone (PPESK) containing phthalazinone until completely dissolved to obtain a prepolymer solution. Then add 0.011g of azobisisobutyronitrile (AIBN) to the above-mentioned pre-polymerization solution, stir and heat under the protection of nitrogen, and carry out the polymerization reaction under the condition of constant temperature and stirring at 80°C. After 4 hours, the first Reaction mixture, and then raise the temperature of the first reaction mixture and keep other reaction conditions unchanged, carry out the cross-linking reaction at a constant temperature of 120° C., and obtain the second reaction mixture after 2 hours. Put the above-mentioned second reaction mixture in a sealed reagent bottle and let it stand for 10 hours to remove air bubbles. Finally, cast the film naturally on a smooth and clean glass pl...

Embodiment 2

[0058] Put 26.18g of 1-methyl-2-pyrrolidone (NMP) into a three-necked flask, and then add 3.0mmol styrenesulfonic acid (SSH), 1.5mmol sodium styrenesulfonate (SSS), and 10.5mmol diazepine The polyarylether sulfone ketone (PPESK) of naphthone is completely dissolved to obtain the prepolymer liquid. Then add 0.009g of azobisisobutyronitrile (AIBN) to the above-mentioned pre-polymerization solution, stir and heat under the protection of nitrogen, and carry out the polymerization reaction under the condition of constant temperature and stirring at 70°C. After 5 hours, the first Reaction mixture, and then raise the temperature of the first reaction mixture and keep other reaction conditions unchanged, carry out the crosslinking reaction at a constant temperature of 130° C., and obtain the second reaction mixture after 3 hours. Put the above-mentioned second reaction mixture in a sealed reagent bottle and let it stand for 10 hours to remove air bubbles. Finally, cast the film natura...

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Abstract

The invention provides a preparation method of a polymer micro-filtration membrane. The preparation method comprises the following steps of: carrying out polymerization reaction on a sulfonic acid monomer containing double bonds in an organic solvent containing poly(phthalazinone ether sulfone ketone) under the action of an initiator to obtain a first reaction mixture; then heating to generate a crosslinking reaction to obtain a second reaction mixture; and finally carrying out film forming treatment to obtain the polymer micro-filtration membrane, wherein the poly(phthalazinone ether sulfone ketone) containing phthalazinone. According to the preparation method provided by the invention, the aperture size and the hole density of the polymer micro-filtration membrane can be simply and effectively adjusted by changing the proportions of raw material components in the reaction on the basis of pore-forming through interaction among polymer molecule chains; and meanwhile, reagents used in the preparation process are common reagents and are low in cost and easy for implementation of reaction conditions, and a pore-forming method is convenient and fast.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of a polymer microfiltration membrane. Background technique [0002] Polymer microfiltration membrane is one of the earliest membrane technologies developed and applied, and it is also one of the most important filtration membranes in separation science today. Polymer microfiltration membranes use natural or synthetic polymers as membrane materials, and their main function is to allow macromolecules and dissolved solids (inorganic salts) in the gas phase or liquid phase to pass through, but will intercept more than 0.1 to 10 microns Substances such as suspended solids, particles, bacteria and large molecular weight colloids have been widely used in the separation and filtration process of food, medicine, electronics, environmental protection and other fields. [0003] At present, the preparation methods of polymer microfiltration memb...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00
Inventor 徐铜文刘蕊吴亮
Owner UNIV OF SCI & TECH OF CHINA
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