A preparation method of an antibacterial stable nanofiltration membrane material

A nanofiltration membrane and stable technology, applied in the field of nanofiltration membranes, can solve the problems such as the inability to store and fix antibacterial components for a long time, poor anti-pollution stability, etc. improved effect

Inactive Publication Date: 2019-06-11
俞小峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the antibacterial component of the existing antibacterial and anti-pollution nanofiltration membrane material cannot be preserved and fixed for a long time, resulting in poor anti-pollution stability, a preparation method of an antibacterial and stable nanofiltration membrane material is provided

Method used

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  • A preparation method of an antibacterial stable nanofiltration membrane material

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example 1

[0018] Stir and mix Zanthoxylum bungeanum and deionized water at a mass ratio of 1:5, heat in a water bath at 45°C for 45 minutes, adjust the pH to 3.5 with a 5% acetic acid solution by mass fraction, and obtain a mixed solution with an enzyme dosage of 50 U / g. Add pepsin to the mixture, heat in a water bath at 30°C for 2 hours, continue heating and boiling and keep warm for 105 minutes, centrifuge at 1500r / min for 10 minutes, collect the supernatant and adjust the pH to 7.0 with mass fraction of 5% ammonia water, and use the cut-off Separation and purification of molecular weight 5ku ultrafiltration centrifuge tubes and collection of purified liquid; then weigh 45 parts of purified liquid, 60 parts of pH 7.0 disodium hydrogen phosphate-sodium dihydrogen phosphate buffer, 10 parts of chitosan , 3 parts of dopamine hydrochloride and 1 part of chitinase are placed in a mixer, stirred and mixed and placed under 200W for ultrasonic dispersion for 10 minutes to obtain a coating disp...

example 2

[0020] Stir and mix Zanthoxylum bungeanum protein and deionized water according to the mass ratio of 1:5, heat in a water bath at 47°C for 55 minutes, adjust the pH to 3.5 with a 5% acetic acid solution by mass fraction, and obtain a mixed solution with an enzyme dosage of 50 U / g. Add pepsin to the mixture, heat in a water bath at 32°C for 2 hours, continue heating to boil and keep warm for 12 minutes, centrifuge at 1750r / min for 12 minutes, collect the supernatant and adjust the pH to 7.0 with mass fraction 5% ammonia water, and use cut-off Separation and purification of molecular weight 7ku ultrafiltration centrifuge tubes and collection of purified liquid; then weigh 47 parts of purified liquid, 70 parts of pH 7.0 disodium hydrogen phosphate-sodium dihydrogen phosphate buffer, 12 parts of chitosan , 4 parts of dopamine hydrochloride and 1 part of chitinase are placed in a mixer, stirred and mixed and placed under 250W for ultrasonic dispersion for 12 minutes to obtain a coat...

example 3

[0022] Stir and mix Zanthoxylum bungeanum protein and deionized water according to the mass ratio of 1:5, heat in a water bath at 50°C for 60 minutes, adjust the pH to 3.5 with a 5% acetic acid solution by mass fraction, and obtain a mixed solution with an enzyme dosage of 50 U / g. Add pepsin to the mixture, heat in a water bath at 35°C for 3 hours, continue to heat and boil and keep warm for 15 minutes, centrifuge at 2000r / min for 15 minutes, collect the supernatant and adjust the pH to 7.0 with mass fraction 5% ammonia water, and use cut-off Molecular weight 10ku ultrafiltration centrifuge tube for separation and purification and collect the purified liquid; then weigh 50 parts of purified liquid, 80 parts of pH 7.0 disodium hydrogen phosphate-sodium dihydrogen phosphate buffer, 15 parts of chitosan , 5 parts of dopamine hydrochloride and 2 parts of chitinase are placed in a mixer, stirred and mixed and placed under 300W for ultrasonic dispersion for 15 minutes to obtain a coa...

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Abstract

The invention relates to a preparation method of an antibacterial stable nanofiltration membrane material, and belongs to the technical field of nanofiltration membranes. Zanthoxylum bungeanum proteinis subjected to extraction and purification to collect an antibacterial peptide. After the antibacterial peptide is loaded onto the surface of a film, loading and coating of bacteria on the surface of a nanofiltration membrane are effectively prevented because the antibacterial peptide structure has excellent antibacterial performance. Meanwhile, because of ultraviolet irradiation grafting, the antibacterial peptide on the surface of the nanofiltration membrane is subjected to a photodegradation reaction under ultraviolet irradiation to generate free radicals to be fixed to the membrane, theloading performance is improved, the problem that the antibacterial peptide is dissolved and dispersed after the surface of the nanofiltration membrane is soaked and used for a long time is effectively solved, and the antibacterial stability of the material is further improved.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial and stable nanofiltration membrane material, belonging to the technical field of nanofiltration membranes. Background technique [0002] The nanofiltration membrane separation process is a pressure-driven process with no phase change, low energy consumption, and high selective separation. It has been widely used in wastewater treatment, drug concentration, biological product purification, and drinking water softening. However, suspended particles, colloids, and microorganisms in the feed liquid are easy to adsorb and bond on the membrane, settle and accumulate, and grow and reproduce, causing serious membrane fouling problems, resulting in a sharp decline in membrane separation performance and treatment efficiency, and cleaning during operation. And maintenance costs continue to increase, which seriously limits the market application and long-term development prospects of nanofiltration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/02B01D67/00
Inventor 李华杨亚生张建初
Owner 俞小峰
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