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Preparation method of cellulose laminated antibacterial ultrafiltration membrane

A technology of ultrafiltration membrane and cellulose, applied in the field of ultrafiltration, can solve the problems of low flux recovery rate, low flux of ultrafiltration membrane, low antibacterial rate, etc., to achieve high flux, solve low flux, and prevent agglomeration effect of precipitation

Inactive Publication Date: 2017-09-19
俞小峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the disadvantages of low flux of the ultrafiltration membrane prepared by the traditional method and poor antibacterial effect after use, which leads to a decrease in its antibacterial rate and low flux recovery rate, a cellulose laminate is improved. The preparation method of layer antibacterial ultrafiltration membrane

Method used

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  • Preparation method of cellulose laminated antibacterial ultrafiltration membrane
  • Preparation method of cellulose laminated antibacterial ultrafiltration membrane
  • Preparation method of cellulose laminated antibacterial ultrafiltration membrane

Examples

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Effect test

example 1

[0019] Weigh 10g of ferric chloride hexahydrate, 4.0g of ferrous chloride tetrahydrate and 300mL of deionized water, mix them and put them into a reactor, and stir them at 300r / min under nitrogen atmosphere until the solids are completely dissolved to obtain a mixed solution; Add 30mL of ammonia water with a mass fraction of 20% dropwise to the mixture at a rate of 1mL / min, stir at 300r / min for 30min, then heat to 80°C, add 0.3g of sodium citrate, keep the reaction for 1h, and cool to room temperature, and separated by a magnet to obtain a black solid, which was washed three times with deionized water and absolute ethanol in turn to obtain a magnetic Fe 3 o 4 Nanoparticles; then weigh 4g of magnetic Fe 3 o 4 Nanoparticles were added to 80mL of 5% glucose solution, dispersed by 300W ultrasonic wave for 10min, transferred to a hydrothermal reactor, reacted at 180°C for 5h, and cooled to room temperature after reaction to obtain a reaction solution; The filter residue was obta...

example 2

[0024] Weigh 13g of ferric chloride hexahydrate, 4.4g of ferrous chloride tetrahydrate and 400mL of deionized water, put them into the reactor after mixing, and stir at 350r / min under nitrogen atmosphere until the solids are completely dissolved to obtain a mixed solution; Add 35mL of ammonia water with a mass fraction of 20% to the mixture at a rate of 2mL / min, and stir at 350r / min for 35min, then heat to 85°C, add 0.4g of sodium citrate, keep the reaction for 2h, and cool to room temperature, and separated with a magnet to obtain a black solid, which was washed with deionized water and absolute ethanol 4 times successively to obtain a magnetic Fe 3 o 4 Nanoparticles; then weigh 5g of magnetic Fe 3 o 4 Nanoparticles were added to 90mL of 5% glucose solution, dispersed by 300W ultrasonic wave for 13min, transferred to a hydrothermal reactor, reacted at 200°C for 6h, and cooled to room temperature after reaction to obtain a reaction solution; Liquid filtration to get the fil...

example 3

[0029] Weigh 15g of ferric chloride hexahydrate, 4.8g of ferrous chloride tetrahydrate and 500mL of deionized water, put them into the reactor after mixing, and stir at 400r / min under a nitrogen atmosphere until the solids are completely dissolved to obtain a mixed solution; Add 40mL of ammonia water with a mass fraction of 20% to the mixture at a rate of 2mL / min, and stir at 400r / min for 40min, then heat to 90°C, add 0.5g of sodium citrate, keep the reaction for 2h, and cool to room temperature, and separated with a magnet to obtain a black solid, which was washed with deionized water and absolute ethanol 5 times in turn to obtain a magnetic Fe 3 o 4 Nanoparticles; then weigh 5g of magnetic Fe 3 o 4 Nanoparticles were added to 100mL of 5% glucose solution, dispersed by 300W ultrasonic wave for 15min, transferred to a hydrothermal reactor, reacted at 220°C for 6h, and cooled to room temperature after reaction to obtain a reaction liquid; Liquid filtration to get the filter ...

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Abstract

The invention belongs to the technical field of ultrafiltration, and particularly relates to a preparation method of a cellulose laminated antibacterial ultrafiltration membrane. The preparation method comprises the following steps: by taking ferric chloride hexahydrate and iron dichloride tetrahydrate as raw materials, preparing a magnetic Fe3O4 nano particle, by taking glucose as a carbon source, wrapping the surface of the magnetic Fe3O4 nano particle with an amorphous carbon layer to provide more reaction sites for deposition of TiO2, then by taking tetrabutyl titanate as a titanium source, depositing the TiO2 on the surface of a nano particle, stirring and mixing the nano particle with cellulose acetate and the like, performing standing and defoaming, thus obtaining a membrane casting solution, coating a polyvinylidene fluoride micro-filtration membrane with the membrane casting solution, performing suction to deposit the membrane casting solution on the polyvinylidene fluoride micro-filtration membrane, migrating a magnetic nano composite material to the surface of the membrane layer through magnetic field induction, thus constructing an antibacterial layer, and preparing the cellulose laminated antibacterial ultrafiltration membrane. The problems of low flux of a conventional ultrafiltration membrane and poor antibacterial effect of the used ultrafiltration membrane are solved. The preparation method is simple in preparation step, and the obtained ultrafiltration membrane is high in flux and relatively good in antibacterial effect and flux recovery rate.

Description

technical field [0001] The invention belongs to the technical field of ultrafiltration, and in particular relates to a preparation method of a cellulose laminated antibacterial ultrafiltration membrane. Background technique [0002] Ultrafiltration technology is a physical separation process with low energy consumption and no phase change. It has the advantages of high efficiency, energy saving, no pollution, convenient operation and wide application. At present, ultrafiltration membranes are not only widely used in the fields of separation, concentration and purification of biological products, purification of pharmaceutical products and food industry, but also in water treatment, chemical and other industries. However, the existing ultrafiltration membranes seldom have antibacterial properties, and the surface is easy to attach and breed microorganisms, resulting in a series of problems such as microbial leakage and membrane biofouling. [0003] There are two main direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/12B01D69/02B01D67/00
CPCB01D71/34B01D67/0002B01D69/02B01D69/12B01D2325/48
Inventor 李华盛开洋杨阳
Owner 俞小峰
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