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Polyacrylonitrile hollow fiber ultrafiltration membrane and preparing method thereof

A technology of polyacrylonitrile and ultrafiltration membranes, which is applied in ultrafiltration, chemical instruments and methods, membranes, etc., to achieve the effects of excellent quality, improved stability, and reduced loss rate

Inactive Publication Date: 2017-01-04
VONTRON MEMBRANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] And in the prior art, for the hydrophilic modification method of hollow fiber ultrafiltration membrane, it does not adopt lithium hydroxide, sodium hydroxide, potassium hydroxide or sulfuric acid as modifier a; Chitosan, ethylenediamine, polyethylene glycol, ethylene glycol, dextran, glucose, triethanolamine, glycerol, polyvinyl alcohol, hexamethylenediamine, p-phenylenediamine, p-aminophenol, polyethylene glycol Any one of alcohol, 1,4-butanediol, butanetriol, pentaerythritol, glucosamine, aminopropanol, 2-amino-n-butanol, aminobutanol, aminocyclohexanol is used as modifier b; Modifier a and modifier b are used for hydrophilic modification treatment of polyacrylonitrile hollow fiber ultrafiltration membrane surface grafting

Method used

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  • Polyacrylonitrile hollow fiber ultrafiltration membrane and preparing method thereof
  • Polyacrylonitrile hollow fiber ultrafiltration membrane and preparing method thereof
  • Polyacrylonitrile hollow fiber ultrafiltration membrane and preparing method thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing a polyacrylonitrile hollow fiber ultrafiltration membrane, comprising the following steps:

[0035] (1) Import organic solvent, polyacrylonitrile and additive in dry-wet machine reaction kettle, wherein, polyacrylonitrile mass percentage is 10%, additive mass percentage is 3%, organic solvent 87%; Mechanical stirring fully mixes, static Put vacuum defoaming to obtain clear and transparent solution;

[0036] (2) Control the temperature to 25°C, open the discharge valve of the reactor, and feed nitrogen gas into the reactor so that the pressure in the reactor is 0.2MPa, turn on the spinning pump, control the speed to 20r / min, and the core liquid pump The rotating speed is controlled at 15 rpm, the spinneret of the spinning pump is extruded and spun, and after passing through the coagulation bath at 25°C, the silk is wound on the winding roller, and the winding speed is 25r / min. After completion, it is removed from the winding roller to obtain the h...

Embodiment 2

[0044] A method for preparing a polyacrylonitrile hollow fiber ultrafiltration membrane, comprising the following steps:

[0045] (1) Import organic solvent, polyacrylonitrile and additive in dry-wet machine reactor, wherein, polyacrylonitrile mass percentage is 18%, additive mass percentage is 5%, organic solvent 77%; Mechanical stirring fully mixes, static Put vacuum defoaming to obtain clear and transparent solution;

[0046] (2) Control the temperature to 25°C, open the discharge valve of the reactor, and feed nitrogen gas into the reactor so that the pressure in the reactor is 0.2MPa, turn on the spinning pump, control the speed to 20r / min, and the core liquid pump The rotating speed is controlled at 15 rpm, the spinneret of the spinning pump is extruded and spun, and after passing through the coagulation bath at 25°C, the silk is wound on the winding roller, and the winding speed is 25r / min. After completion, it is removed from the winding roller to obtain the hollow fi...

Embodiment 3

[0054] A method for preparing a polyacrylonitrile hollow fiber ultrafiltration membrane, comprising the following steps:

[0055] (1) Import organic solvent, polyacrylonitrile and additive in dry-wet machine reactor, wherein, polyacrylonitrile mass percentage is 15%, additive mass percentage is 0.2%, organic solvent 84.8%; Mechanical stirring fully mixes, static Put vacuum defoaming to obtain clear and transparent solution;

[0056] (2) Control the temperature to 25°C, open the discharge valve of the reactor, and feed nitrogen gas into the reactor so that the pressure in the reactor is 0.2MPa, turn on the spinning pump, control the speed to 20r / min, and the core liquid pump The rotating speed is controlled at 15 rpm, the spinneret of the spinning pump is extruded and spun, and after passing through the coagulation bath at 25°C, the silk is wound on the winding roller, and the winding speed is 25r / min. After completion, it is removed from the winding roller to obtain the hollo...

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PUM

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Abstract

The invention relates to the technical field of membranes, in particular to a polyacrylonitrile hollow fiber ultrafiltration membrane and a preparing method thereof. A polypropylene hollow fiber ultrafiltration membrane is hydrolyzed with a solution of a modifier a, and then active hydrophilic groups can be formed on the surface of the polypropylene hollow fiber ultrafiltration membrane; besides, sodium hydroxide, potassium hydroxide, lithium hydroxide and sulfuric acid are adopted for the raw material ingredients of the modifier a to ensure that the active hydrophilic groups formed on the surface of the membrane can be grafted with hydrophilic micromolecules in a modifier b so that linkage on the surface of the membrane can be achieved through chemical bonds; the hydrophilic performance of the polypropylene hollow fiber ultrafiltration membrane is improved, especially, loss of a hydrophilic layer of the membrane in the use process can be avoided, and the stability of the hydrophilic performance of the membrane is improved.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to a polyacrylonitrile hollow fiber ultrafiltration membrane and a preparation method thereof. Background technique [0002] Water is an extremely precious and irreplaceable renewable resource in the process of human survival and development, and is a necessary condition for human survival. Therefore, all countries in the world are vigorously developing, utilizing and protecting this precious resource. Membrane technology, as the "water treatment technology in the 21st century", has completed the transformation from laboratory to large-scale industrial application after half a century of development, and has become a new separation technology with high efficiency and energy saving, and its small footprint , low operating energy consumption, easy operation, and environmental friendliness have gradually become the preferred technology in the field of water treatment. It is widely u...

Claims

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Application Information

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IPC IPC(8): B01D71/42B01D61/14B01D63/02B01D67/00
CPCB01D71/42B01D61/145B01D63/02B01D67/0016B01D2325/24B01D2325/36
Inventor 陈心笛郭玉阳杨兴胜赵治宁梁松苗
Owner VONTRON MEMBRANE TECH CO LTD
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