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Acid and alkaline resistant ultrafiltration membrane material and preparation method thereof

An ultrafiltration membrane, anti-acid and alkali technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve superior anti-acid and alkali performance, improve performance, improve water flux and retention rate

Inactive Publication Date: 2012-10-17
CSR QINGDAO HUAXUAN WATER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although China has developed rapidly in the research of ultrafiltration membrane materials and membrane preparation technology, there is still a big gap compared with foreign countries. The domestic membrane market is almost monopolized by foreign companies, so self-developed ultrafiltration membranes with excellent performance, It is of great practical significance to study the separation process of ultrafiltration membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dry the PS powder (Shuguang Chemical Factory of Shanghai Plastic Industry United Corporation) in a vacuum oven at 80°C for 24 hours, then weigh 18% PS with an electronic balance, and measure 70% of the solvent DMAC (dimethylacetamide) (Tianjin City Bodi Chemical Co., Ltd.), 12% PEG400 (polyethylene glycol) (Sinopharm Chemical Preparation Co., Ltd.), the dosage ratio of the above-mentioned added elements is recorded in 100 parts by weight. Finally, measure 0.2% of the additive. Dissolve the dried PS and PEG400 in the DMAC solvent solution according to the above ratio, mix and stir, then add the additives to the mixed solution, and stir for 4 hours with a constant temperature magnetic stirrer at a certain temperature (38°C) to form a uniform casting solution , and then defoaming in a constant temperature water bath at 30±1°C for 24h. In the spinning machine, use a special spinneret to extrude to form hollow fibrils, and let them stand for a period of time to evaporate pa...

Embodiment 2

[0020] Dry the PS powder (Shuguang Chemical Factory of Shanghai Plastic Industry United Corporation) in a vacuum oven at 80°C for 24 hours, then weigh 18% PS with an electronic balance, and measure 70% of the solvent DMAC (dimethylacetamide) (Tianjin City Bodi Chemical Co., Ltd.), 12% PEG400 (polyethylene glycol) (Sinopharm Chemical Preparation Co., Ltd.), the dosage ratio of the above-mentioned added elements is recorded in 100 parts by weight. Finally measure 0.4% of the additive. Dissolve the dried PS and PEG400 in the DMAC solvent solution according to the above ratio, mix and stir, then add the additives to the mixed solution, and stir for 4 hours with a constant temperature magnetic stirrer at a certain temperature (38°C) to form a uniform casting solution , and then defoaming in a constant temperature water bath at 30±1°C for 24h. In the spinning machine, use a special spinneret to extrude to form hollow fibrils, and let them stand for a period of time to evaporate par...

Embodiment 3

[0022] Dry the PS powder (Shuguang Chemical Factory of Shanghai Plastic Industry United Corporation) in a vacuum oven at 80°C for 24 hours, then weigh 18% PS with an electronic balance, and measure 70% of the solvent DMAC (dimethylacetamide) (Tianjin City Bodi Chemical Co., Ltd.), 12% PEG400 (polyethylene glycol) (Sinopharm Chemical Preparation Co., Ltd.), the dosage ratio of the above-mentioned added elements is recorded in 100 parts by weight. Finally, measure 0.6% of the additive. Dissolve the dried PS and PEG400 in the DMAC solvent solution according to the above ratio, mix and stir, then add the additives to the mixed solution, and stir for 4 hours with a constant temperature magnetic stirrer at a certain temperature (38°C) to form a uniform casting solution , and then defoaming in a constant temperature water bath at 30±1°C for 24 hours. In the spinning machine, use a special spinneret to extrude to form hollow fibrils, and let them stand for a period of time to evapora...

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Abstract

The invention adapts a technical scheme of an acid and alkaline resistant ultrafiltration membrane material. The ultrafiltration membrane material comprises the following components, by weight: 15-20% of polysulfone (PS), 60%-70% of dimethyl acetamide (DMAC), 10%-15% of polyethylene glycol (PEG400), and 0.2%-1.2% of additive. The ultrafiltration membrane material not only improves main performance indexes of flux and retention rate, and has superior acid and alkaline resistant performance.

Description

technical field [0001] The invention relates to an ultrafiltration membrane material, in particular to an acid and alkali resistant ultrafiltration membrane material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Ultrafiltration membrane is one of the most widely researched and applied membrane separation technologies at home and abroad, and it has been more and more widely used in the fields of water and other fluid purification, food or fermentation industry. However, although China has developed rapidly in the research of ultrafiltration membrane materials and membrane preparation technology, there is still a big gap compared with foreign countries. The domestic membrane market is almost monopolized by foreign companies, so self-developed ultrafiltration membranes with excellent performance, It is of great practical significance to study the separation process of ultrafiltration membrane. [0003] Fo...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D69/08B01D69/02
Inventor 杨佃章邓发晓蔡树威张松
Owner CSR QINGDAO HUAXUAN WATER