High-efficiency antibacterial ultra-filtration membrane and preparation process thereof

A preparation process and ultrafiltration membrane technology, which is applied in the field of high-efficiency antibacterial ultrafiltration membrane and its preparation process, can solve the problems of poor sterilization effect, easy pollution of ultrafiltration membrane, and difficult fixation of organic antibacterial agents, etc., and achieve remarkable antibacterial effect, Guaranteed stability, inhibition of reproduction and growth

Inactive Publication Date: 2016-06-08
SHANGHAI EMATE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is the problem that the existing ultrafiltration membrane is easily polluted, the bactericidal effect is poor, and the organic antibacterial agent is not easy to fix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 200g of food-grade polyvinyl chloride with a polymerization degree of 1300 and 70g of vinyl chloride-vinyl acetate with an intrinsic viscosity of 60ml / g into 550g of dimethylformamide solution, stir for 10 minutes, make it evenly mixed, and add 50g polyethylene glycol 400, continue to stir for 10 minutes; then add 5g polyhexamethylene guanidine powder, 5g nano-zinc oxide, 1g dicumyl peroxide, after 6 hours of continuous stirring at a speed of 220 rpm , to obtain spinning casting solution. Spinning is carried out by dry-jet wet-spinning method, and the casting liquid is extruded by inserting a tubular nozzle, and the antibacterial ultrafiltration membrane is prepared by using the principle of non-solvent liquid phase separation.

Embodiment 2

[0020] 300g of food-grade polyvinyl chloride with a degree of polymerization of 700, 30g of vinyl chloride-vinyl acetate with a characteristic viscosity of 80ml / g were added to 550g of dimethylformamide and 50g of N-methylpyrrolidone solution, and stirred for 10 minutes to make it Mix well, add 30g polyethylene glycol 2000 and 10g polyvinylpyrrolidone K30 to it, and continue to stir for 10 minutes; then add 10g polyhexamethyleneguanidine powder, 0.5g dicumyl peroxide and 0.5g dicumyl peroxide Benzoyl, after 6 hours of continuous stirring at a rotating speed of 220 rpm, a spinning casting solution was obtained. Spinning is carried out by dry-jet wet-spinning method, and the casting liquid is extruded by inserting a tubular nozzle, and the antibacterial ultrafiltration membrane is prepared by using the principle of non-solvent liquid phase separation.

Embodiment 3

[0022] 300g degree of polymerization is 1800 food-grade polyvinyl chloride, 30g characteristic viscosity is that the vinyl chloride-vinyl acetate of 70ml / g joins in 550g dimethylformamide and 50gN-methylpyrrolidone solution, stirs 10 minutes, makes it Mix evenly, add 30g polyethylene glycol 2000 and 10g polyvinylpyrrolidone K30 therein, continue to stir for 10 minutes; Then add 5g nano-zinc oxide and 5g glass-loaded zinc, after 6 hours of continuous stirring at a rotating speed of 220 rpm, A spinning casting solution is obtained. Spinning is carried out by dry-jet wet-spinning method, and the casting liquid is extruded by inserting a tubular nozzle, and the antibacterial ultrafiltration membrane is prepared by using the principle of non-solvent liquid phase separation.

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Abstract

The invention discloses a high-efficiency antibacterial ultra-filtration membrane and a preparation process thereof. By adopting a solution phase inversion method, the preparation process comprises the following steps: adding a nano antibacterial material into a membrane casting solution, adding a grafting initiator, and grafting the organic antibacterial material onto a macromolecular material, thereby preparing the antibacterial ultra-filtration membrane. By adopting the organic / inorganic antibacterial material which does not influence the performance of the ultra-filtration membrane, polyhexamethylene guanidine is macromolecular polymer powder with positive charges, can have reaction with a microbial cell membrane and is slightly soluble in the water, and the polyhexamethylene guanidine is grafted to a high polymer by utilizing a grafting agent, so that the stability is further guaranteed, and the loss and dropping along the time can be avoided. An inorganic antibacterial agent can effectively inhibit the breeding and growth of bacteria on the macromolecular membrane material; and when the inorganic antibacterial agent is combined with an organic antibacterial agent to use, the antibacterial effect is more remarkable.

Description

technical field [0001] The invention relates to a preparation process of an ultrafiltration membrane, in particular to a high-efficiency antibacterial ultrafiltration membrane and a preparation process thereof. Background technique [0002] Membrane separation technology is widely used in the fields of food, medicine, metallurgy, chemical industry, environmental protection and energy due to its advantages of low energy consumption, high separation efficiency and easy operation, and has achieved considerable development. The existing ultrafiltration membrane technology is a new type of membrane separation technology developed in the 21st century. It can intercept sediment, colloid, rust, microorganisms and macromolecular proteins in domestic drinking water. Since the ultrafiltration membrane itself does not have a bactericidal function, When the filtered water capacity reaches a certain volume, bacteria are enriched on the surface of the ultrafiltration membrane and in the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/78B01D71/30B01D71/26B01D69/02B01D67/00
CPCB01D71/78B01D67/0011B01D69/02B01D71/26B01D71/30B01D2323/39B01D2325/48
Inventor 张晓姮李剑
Owner SHANGHAI EMATE INDAL
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