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Ultrafiltration membrane and preparation method thereof

A technology of ultrafiltration membranes and membrane filaments, which is applied in the field of filtration membranes, can solve problems such as contamination, decrease in flux and separation performance of ultrafiltration membranes, and increase in use costs, so as to promote dissolution, improve purity and production efficiency, The effect of easy supply

Pending Publication Date: 2019-10-15
广西国宏智鸿环保科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of the ultrafiltration membrane material or its structure, the ultrafiltration membrane will inevitably be polluted during long-term use. The pollution problem will lead to a significant decrease in the flux and separation performance of the ultrafiltration membrane, increasing the cost of use.

Method used

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  • Ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Polyvinylidene fluoride resin:

[0037] Polyvinylidene fluoride (PVDF) is a semi-crystalline polymer under normal conditions, with a crystallinity of about 50%. So far, 5 crystal forms, α, β, γ, 6 and ε, have been reported, which are formed under different conditions and can be transformed into each other under certain conditions (effects of heat, electric field, mechanical and radiation energy). Among the five crystal forms, the β crystal form is the most important, and PVDF used as piezoelectric and pyroelectric applications mainly contains the β crystal form. 1. PVDF has excellent chemical corrosion resistance, excellent high temperature color change resistance and oxidation resistance. 2. PVDF has excellent wear resistance, flexibility, high tensile strength and impact resistance.

[0038] The application of PVDF is mainly concentrated in the three major fields of petrochemical, electrical and electronic and fluorocarbon coatings. Due to the good chemical resistan...

Embodiment 2

[0075] In actual production, when it is the following components:

[0076] Polyvinylidene fluoride resin (28%), glycerin (3%), ethylene glycol (1%), propylene glycol (1%), nitrogen methyl pyrrolidone (50%), acetone (27%), titanium dioxide (0.2%) :

[0077]1) Drying material--high molecular polymer raw materials are easy to absorb moisture, and the raw materials need to be dried before batching, otherwise the moisture content will affect the batching ratio when feeding, thus affecting product quality. In order to ensure product quality, the drying process is carried out according to the drying time and temperature of different raw materials, and the equipment used is an oven. High molecular polymer raw materials are easy to absorb water, and the raw materials need to be dried before batching. Drying is carried out in the oven according to the drying time and temperature of different raw materials, and the polyvinylidene fluoride resin particle crystals are put into the drying ...

Embodiment 3

[0096] Polyvinylidene fluoride resin (28%), glycerin (3%), ethylene glycol (1%), polyvinyl alcohol (1%), nitrogen methyl pyrrolidone (50%), acetone (27%), trioxide Aluminum (0.2%):

[0097] 1) Drying material--high molecular polymer raw materials are easy to absorb moisture, and the raw materials need to be dried before batching, otherwise the moisture content will affect the batching ratio when feeding, thus affecting product quality. In order to ensure product quality, the drying process is carried out according to the drying time and temperature of different raw materials, and the equipment used is an oven. High molecular polymer raw materials are easy to absorb water, and the raw materials need to be dried before batching. Drying is carried out in the oven according to the drying time and temperature of different raw materials, and the polyvinylidene fluoride resin particle crystals are put into the drying process. Machine, dry at 45°C-50°C for 30-40min for standby;

[0...

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Abstract

The invention relates to an ultrafiltration membrane and a preparation method thereof, and belongs to the technical field of a filtering membrane. The ultrafiltration membrane is characterized in thatthe membrane microporous diameter of the ultrafiltration membrane is 0.02 to 0.5 microns, the membrane thickness is 0.2 to 0.5 mm, and the membrane silk outer diameter is 1 to 2 mm; and membrane making liquid comprises the following components in percentage by weight: 15 to 30 percent of polyvinylidene fluoride resin, 2 to 6 percent of glycerinum, 1 percent of a hydrophilic modifier, 2 percent ofan organic additive, 35 to 50 percent of a main active solvent, 12 to 27 percent of a secondary active solvent and 0.1 to 0.5 percent of a nanometer additive. The ultrafiltration membrane and the preparation method thereof have the following beneficial effects: the process is easy to master; the raw materials are easy to supply; the hydrophilic modifier greatly promotes the dissolution effect; the organic additive enables the finished product to maintain better properties of organic matters; during material throwing preparation, due to multi-time throwing and temperature fluctuation, the reaction of the components is promoted and the finished product has high property; and by a fully-automatic production mode, the purity of the finished products and the production efficiency are greatly improved.

Description

technical field [0001] The invention relates to an ultrafiltration membrane and a manufacturing method thereof, belonging to the technical field of filtration membranes. Background technique [0002] With the rapid development of my country's economy, water resources have become more and more restrictive factors for economic development. Therefore, it has become an inevitable trend to reduce sewage discharge and recycle water. The traditional sewage regeneration treatment technology has the disadvantages of low water quality, large land occupation, poor stability, etc., and can no longer meet the new requirements. A new process-membrane water treatment has emerged as the times require, and this process has been increasingly used. For water purification and sewage recycling. [0003] Membrane separation technology has the advantages of low energy consumption, simple process, high separation efficiency, and no environmental pollution. It is an important high-tech solution to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/08B01D67/00
CPCB01D71/34B01D69/08B01D67/0079
Inventor 邹清川邹焕鑫邹振生杨庆国高海杰谭少花
Owner 广西国宏智鸿环保科技集团股份有限公司
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