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Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane

A technology of polypropylene and hydrophilization, applied in the field of material science, to achieve the effect of not being polluted easily, meeting the requirements of spinning performance and strength of membrane filaments, and improving the hydrophilicity

Active Publication Date: 2014-07-23
贵州益华膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: provide a kind of preparation method of the hydrophilic modified polypropylene hollow fiber membrane of a kind of flux, it makes the hydrophilic property of polypropylene hollow fiber membrane obviously improve and can maintain for a long time, and water flux is big, High interception rate, not easy to produce pollution, to overcome the deficiencies of the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 of the present invention: the preparation method of the hydrophilic modified polypropylene hollow fiber membrane of high flux, comprises the following steps:

[0019] (1) Graft modification of polypropylene: Calculated in parts by mass, add 2 parts of silane coupling agent KH570 and 0.1 part of DCP into the acetone solution to completely dissolve the silane coupling agent and DCP to obtain a diluted mixture A; then add diluted mixture A to 100 parts of polypropylene to obtain mixture B; then place mixture B in a fume hood until the acetone is completely volatilized to obtain mixture C; then add 0.2 parts of antioxidant 1010, 0.1 part of triple pear After ethyl acetate and mixture C are mixed evenly, in a twin-screw extruder with an aspect ratio of 50, the temperature of each section of the extruder is: 170°C, 175°C, 180°C, 180°C, 180°C, 180°C , 180°C, 180°C, 190°C, after extrusion and granulation, the graft ratio, melt index and mechanical properties of the...

Embodiment 2

[0021] Embodiment 2 of the present invention: the preparation method of the hydrophilic modified polypropylene hollow fiber membrane of high flux, comprises the following steps:

[0022] (1) Graft modification of polypropylene: Calculated in parts by mass, add 3 parts of silane coupling agent KH570 and 0.1 part of DCP into the acetone solution to completely dissolve the silane coupling agent and DCP to obtain a diluted mixture A; Then add the diluted mixture A to 100 parts of polypropylene to obtain mixture B; then place mixture B in a fume hood until the acetone is completely evaporated to obtain mixture C; then add 0.2 parts of antioxidant 168, 0.15 parts of tribasic acid ethyl After the ester and mixture C are mixed evenly, in a twin-screw extruder with an aspect ratio of 50, the temperature of each section of the extruder is: 170°C, 175°C, 180°C, 180°C, 180°C, 180°C, 180°C °C, 180 °C, 190 °C, after extrusion and granulation, the graft ratio, melt index and mechanical prope...

Embodiment 3

[0024] Embodiment 3 of the present invention: the preparation method of the hydrophilic modified polypropylene hollow fiber membrane of high flux, comprises the following steps:

[0025] (1) Graft modification of polypropylene: Calculated in parts by mass, add 4 parts of silane coupling agent KH570 and 0.1 part of DCP into the acetone solution to completely dissolve the silane coupling agent and DCP to obtain a diluted mixture A; Then add the diluted mixture A to 100 parts of polypropylene to obtain mixture B; then place mixture B in a fume hood until the acetone is completely evaporated to obtain mixture C; then add 0.2 parts of antioxidant B225, 0.2 parts of tribasic acid ethyl After the ester and mixture C are mixed evenly, in a twin-screw extruder with an aspect ratio of 50, the temperature of each section of the extruder is: 170°C, 175°C, 180°C, 180°C, 180°C, 180°C, 180°C °C, 180 °C, 190 °C, after extrusion and granulation, the graft ratio, melt index and mechanical prope...

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PUM

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Abstract

The invention discloses a high-throughput hydrophilic modified polypropylene hollow fiber membrane. The preparation method comprises the following steps: grafting a hydrophilic grafting monomer silane coupling agent to a polypropylene molecular chain through a reaction extrusion method; mixing two esters with different polarities and a high boiling point and an additive according to a certain ratio, heating and blending the mixture in a reactor so as to obtain a uniform membrane casting liquid; spinning, cooling, thermally extracting, and reeling the membrane casting liquid by a double-screw extruder and a spinning machine so as to obtain membrane wires; finally extracting esters with ethanol, and subjecting the membrane wires to thermal setting so as to obtain the polypropylene hollow fiber membrane. The preparation method is simple. The prepared polypropylene hollow fiber membrane has the advantages of high strength, stable hydrophilic property, and high water throughput, and can be used to produce membrane devices or membrane biological reactors (MBR).

Description

technical field [0001] The invention relates to the field of material science, in particular to a method for preparing a high-flux hydrophilic modified polypropylene hollow fiber membrane. Background technique [0002] In recent years, membrane technology has become an advanced technology attracting attention at home and abroad due to its advantages of high efficiency and cleanliness, and has been widely used in water treatment, food and beverage, electronics industry, medicine and health and biological products and other industries. The development of membranes with high flux, high strength, good stability and low price is the direction of membrane technology development. In the field of membrane research, polypropylene has attracted much attention as a membrane material. Polypropylene is insoluble in any organic solvent at room temperature, has good acid and alkali resistance and biological corrosion resistance, good temperature resistance and low price, and is a cost-eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/78B01D69/08B01D69/02B01D67/00
Inventor 张凯舟邵会菊杨敬葵秦舒浩张敏敏姚勇崔振宇
Owner 贵州益华膜科技有限公司
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