Capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane and preparation method thereof

An anti-biological fouling and functional group technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of membrane separation performance degradation, ultrafiltration membrane surface biofouling, etc.

Active Publication Date: 2012-07-18
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a hydrophilic type anti-biological fouling ultrafiltration membrane containing capsaicin functional group and its preparation method, which can solve the problems of serious biological pollution on the surface of ultrafiltration membranes and reduced membrane separation performance widely existing at present, and can improve Membrane surface fouling status and prolong membrane life

Method used

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  • Capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane and preparation method thereof
  • Capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane and preparation method thereof
  • Capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a 10ml three-necked flask equipped with a stirring device, a thermometer, and a condenser, add 10ml N, N-dimethylformamide and 0.005mol of the compound N-(4-hydroxyl-3-methoxy-benzyl) containing capsaicin structure ) acrylamide, after mixing evenly, add 0.05mol methyl methacrylate, N 2 Stir at 80°C under protection to make it evenly mixed, then add 0.4g of initiator azobisisobutyronitrile, and react at a constant temperature of 80°C for 20 hours in an airtight chamber to obtain a polymer containing capsaicin structure. The molecular formula of the compound N-(4-hydroxyl-3-methoxy-benzyl)acrylamide containing capsaicin structure is shown in figure 1 ; The infrared spectrum of the polymer containing capsaicin structure is shown in figure 2 . Dissolve 0.2-0.6g of the above polymer, 0.5-1.5g of polyacrylic acid, 0.4g of water, 8g of polyethylene glycol, and 18g of polysulfone in 71.5-72.1g of N,N-dimethylacetamide, and stir at 60°C for 24h. Prepare the casting soluti...

Embodiment 2

[0023] According to the same steps as in Example 1, a polymer containing capsaicin structure was prepared. Dissolve 0.6-1.0g of the above polymer, 1.5-3.5g of polyacrylic acid, 0.4g of water, 8g of polyethylene glycol, and 18g of polysulfone in 69.1-71.5g of N,N-dimethylacetamide, and stir at 60°C for 24h. Prepare the casting solution, and then vacuum degassing for 24h. At room temperature, the casting solution was cast on a non-woven support layer fixed on a glass plate to form a film; dried in air for 5 seconds; soaked in a gel bath at 20°C for 24 hours; rinsed with deionized water to obtain an ultrafiltration membrane.

[0024] The performance of the ultrafiltration membrane was measured, and the results are as follows. Measure its performance. The contact angle of the membrane surface is 43.56-49.82°; the stable flux is 119.0-126.9L / m at the concentration of 5mg / L humic acid solution, operating pressure 0.1MPa, and temperature 20°C 2 h, the retention rate of stable orga...

Embodiment 3

[0026] Add 10ml N, N-dimethylformamide and 0.005mol compound N-(4-hydroxyl-3-methoxy-benzyl) containing capsaicin structure successively in a 10ml three-neck flask equipped with a stirring device, a thermometer, and a condenser Base) acrylamide, after mixing evenly, add 0.01mol methyl methacrylate and 0.01mol ethyl acrylate, N 2 Stir at 70°C under protection to mix evenly, then add 0.4g of initiator azobisisobutyronitrile, and react at a constant temperature of 90°C for 20 hours in a closed chamber to obtain a polymer containing capsaicin structure. Dissolve 1.0g of the above polymer, 2.5-4.0g of polyethylene oxide, 0.4g of water, 8g of polyethylene glycol, and 18g of polysulfone in 73.1g of N,N-dimethylacetamide, and stir at 60°C for 24 hours to prepare a casting Membrane liquid, and then vacuum defoaming for 24h. At room temperature, the casting solution was cast on a non-woven support layer fixed on a glass plate to form a film; dried in air for 5 seconds; soaked in a gel ...

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Abstract

The invention relates to a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane, which is prepared through the steps of mixing capsaicin functional-group containing polymers with a hydrophilic agent and a membrane casting solution; then, carrying out treatment on the obtained mixture by using an immersion phase inversion method. Based on the biological resistance of natural antifouling active substances existing in nature, and through the addition of an appropriate hydrophilic agent, the invention provides a method for preparing a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane. An ultrafiltration membrane prepared by using the method disclosed by the invention is applicable to a water treatment process, so that both the separation performance of the membrane is ensured, and the anti-biological-contamination performance of a membrane module is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of anti-biological pollution ultrafiltration membranes, and in particular relates to a hydrophilic anti-biological pollution ultrafiltration membrane containing capsaicin functional groups and a preparation method thereof. Background technique [0002] In today's world where energy and water resources are in short supply and water and environmental pollution are becoming more and more serious, the use of membrane separation technology to purify water has been highly valued by countries all over the world and has become an important part of the sustainable economic development strategy. As one of the most advanced membrane separation technologies in the world, ultrafiltration has the advantages of high purification rate, low cost, and environmental friendliness. It is usually used as a pretreatment process such as reverse osmosis and widely used in seawater / brackish water desalination, industria...

Claims

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Application Information

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IPC IPC(8): B01D71/82
Inventor 徐佳高从堦高学理于良民王雪
Owner OCEAN UNIV OF CHINA
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