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Grafted modified chlorinated polyvinyl chloride ultrafiltration membrane, and preparation method thereof

A technology of perchloroethylene and graft modification, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problems of poor separation membrane hydrophilicity, affecting separation effect and practical application, membrane hole fouling, etc. To achieve the effect of easy control of concentration, reduction of loss and simple operation

Inactive Publication Date: 2015-12-09
HUBEI SHASHI WATER TREATMENT EQUIP FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because perchlorethylene has excellent film-forming properties, it can be used as a base material to manufacture separation membranes. Since perchlorethylene molecules are all hydrophobic groups, this structure determines its physical and chemical properties. As a separation membrane, the hydrophilicity is poor. In the separation of material and liquid containing a lot of hydrophobic substances, hydrophobic substances are easy to attach to the membrane surface and cause membrane pore fouling, which affects the separation effect and practical application

Method used

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  • Grafted modified chlorinated polyvinyl chloride ultrafiltration membrane, and preparation method thereof
  • Grafted modified chlorinated polyvinyl chloride ultrafiltration membrane, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: A kind of preparation method of grafting modified perchlorethylene ultrafiltration membrane comprises the following steps.

[0028] 1.1 Weigh by weight, film substrate: perchlorethylene (CPVC) resin, chemically pure, dosage 16.5%; solvent: N,N-dimethylacetamide (DMAC), chemically pure, dosage 80.0%; porogen Agent: polyvinylpyrrolidone K30 (PVP), chemically pure, dosage 2.5%; additive: nano-scale aluminum oxide (Al2O3), analytically pure, dosage 0.5%; grafting agent: polyethylene polyamine, chemically pure, dosage 0.5%.

[0029] 1.2 Dry the film substrate perchlorethylene resin. The drying method is to spread the perchlorethylene resin on the tray and put it in an electric blast drying oven, and bake it at 60°C for more than 24hrs.

[0030] 1.3 Add the solvent N,N-dimethylacetamide to the casting solution preparation kettle, and raise the temperature to the preparation temperature, set the preparation temperature to 60°C, cool the perchlorethylene resin ob...

Embodiment 2

[0035] Embodiment 2: A kind of preparation method of grafting modified perchlorethylene ultrafiltration membrane comprises the following steps.

[0036]2.1 Weigh by weight, film substrate: perchlorethylene (CPVC) resin, chemically pure, dosage 18.5%; solvent: N,N-dimethylacetamide (DMAC), chemically pure, dosage 77.0%; porogen Agent: polyvinylpyrrolidone K30 (PVP), chemically pure, dosage 2.5%; additive: nano-scale aluminum oxide (Al2O3), analytically pure, dosage 1.0%; grafting agent: polyethylene polyamine, chemically pure, dosage 1.0%.

[0037] 2.2 Dry the film substrate perchlorethylene resin. The drying method is to spread the perchlorethylene resin on the tray and put it in an electric blast drying box, and bake it at 60-65 ° C for more than 24 hours.

[0038] 2.3 Add the solvent N,N-dimethylacetamide to the casting solution preparation kettle, and raise the temperature to the preparation temperature, set the preparation temperature to 60°C, cool the perchlorethylene re...

Embodiment 3

[0043] Embodiment 3: A kind of preparation method of grafting modified perchlorethylene ultrafiltration membrane comprises the following steps.

[0044] 3.1 Weigh by weight, film substrate: perchlorethylene (CPVC) resin, chemically pure, dosage 18.5%; solvent: N,N-dimethylacetamide (DMAC), chemically pure, dosage 73.0%; porogen Agent: polyvinylpyrrolidone K30 (PVP), chemically pure, dosage 5.5%; additive: nano-scale aluminum oxide (Al2O3), analytically pure, dosage 1.5%; grafting agent: polyethylene polyamine, chemically pure, dosage 1.5%.

[0045] 3.2 Dry the film substrate perchlorethylene resin. The drying method is to spread the perchlorethylene resin on the tray and put it in an electric blast drying box, and bake it at 60-65 ° C for more than 24 hours.

[0046] 3.3 Add the solvent N,N-dimethylacetamide to the casting solution preparation kettle, and raise the temperature to the preparation temperature, set the preparation temperature to 60°C, cool the perchlorethylene r...

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Abstract

The invention belongs to the technical field of ultrafiltration membrane manufacturing, and more specifically relates to a grafted modified chlorinated polyvinyl chloride ultrafiltration membrane, and a preparation method thereof. The grafted modified chlorinated polyvinyl chloride ultrafiltration membrane is composed of, by weight, 16.5 to 20.5% of a membrane base material, chemically pure chlorinated polyvinyl chloride (CPVC) resin, 73.0 to 80.5% of a solvent, chemically pure N,N-dimethyl acetamide (DMAC), 2.5 to 5.5% of a pore-foaming agent, chemically pure polyvinylpyrrolidone (PVP) K30, 0.5 to 1.5% of an additive, chemically pure nanometer-grade aluminium oxide (Al2O3); and 0.5 to 1.5% of a grafting agent, chemically pure polyethylene polyamine. According to the preparation method, membrane base material molecules are grafted with charged groups so as to change surface charge of the membrane base material molecules and improve pollution resistance of the grafted modified chlorinated polyvinyl chloride ultrafiltration membrane.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration membrane manufacturing, in particular to a graft-modified perchlorethylene ultrafiltration membrane and a preparation method thereof. Background technique [0002] Perchlorethylene (CPVC) resin is obtained by chlorination and modification of polyvinyl chloride (PVC) resin. It is a new type of engineering plastic. The product is white or light yellow tasteless, odorless, non-toxic loose granules or powder. After the PVC resin is chlorinated, the irregularity of the molecular bond increases, the polarity increases, the solubility of the resin increases, and the chemical stability increases, thereby improving the material's heat resistance, acid, alkali, salt, oxidant, etc. . [0003] Because perchlorethylene has excellent film-forming properties, it can be used as a base material to manufacture separation membranes. Since perchlorethylene molecules are all hydrophobic groups, this structur...

Claims

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Application Information

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IPC IPC(8): B01D71/30B01D67/00B01D61/18
Inventor 徐德兵彭红斌欧继权雷常标王新英熊张巍周则智
Owner HUBEI SHASHI WATER TREATMENT EQUIP FACTORY
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