Novel biological contamination-resistant ultrathin compound film and preparation method thereof

A bio-resistant and composite membrane technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems such as the difficulty of obtaining p-benzenetriamine, achieve good antibacterial effect, high desalination performance, and convenient preparation Effect

Active Publication Date: 2009-08-12
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-thin functional layer of the film is mainly cross-linked aromatic polyamide; Uemura et al. used interfacial polycondensation method in US Patent 4,761,234 in 1988 to use pyromylene triamine as a cross-linking agent, and isophthaloyl chloride on a support Reaction composite one layer of aromatic polyamide thin film on membrane, desalination rate is greater than 99%, but it is difficult to obtain the used phenylenediamine; Fibiger etc. in US Patent 4,769,148 in 1987, interfacial polymerization prepares the aqueous phase that nanofiltration membrane adopts is The aqueous solution of piperazine and wetting agent, cross-linking agent is trimesoyl chloride; Lawrence et al. adopted interfacial polycondensation method with 5-isocyanate isophthaloyl chloride as cross-linking agent in US Patent 5,693,227 of 1997, and piperazine in polysulfone Preparation of Nanofiltration Membranes by Reaction on Supported Membranes

Method used

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  • Novel biological contamination-resistant ultrathin compound film and preparation method thereof
  • Novel biological contamination-resistant ultrathin compound film and preparation method thereof
  • Novel biological contamination-resistant ultrathin compound film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Use 16% Udel P3500 polysulfone, 0.3% water and 0.1% nonylphenol polyoxyethyl ester phosphate dissolved in N,N-dimethylformamide, scrape on the polyester non-woven fabric, and then dip into After the solvent is removed from the water, a support membrane with a molecular weight cut-off of 20,000-30,000 is obtained, which is stored in a wet state for future use.

[0026] Immerse one side of the wet polysulfone support membrane in an aqueous solution with a weight ratio of m-phenylenediamine of 2% for 2 minutes, roll the surface of the support membrane with a rubber roller and squeeze it dry, and mix it with pentachlorophenyl chloroformate and 5-oxygen Formyl chloride-isophthaloyl chloride mixed in a weight ratio of 1:5, and a 0.12% by weight cyclohexane solution was contacted on one side to carry out interfacial polymerization for 30 seconds. The composite film was dried in the air for 2 minutes, and then treated at 40°C for 3 minutes. Then carry out two steps of rinsing ...

Embodiment 2

[0028] Use 16% Udel P3500 polysulfone, 0.3% water and 0.1% nonylphenol polyoxyethyl ester phosphate dissolved in N,N-dimethylformamide, scrape on the polyester non-woven fabric, and then dip into After the solvent is removed from the water, a support membrane with a molecular weight cut-off of 20,000-30,000 is obtained, which is stored in a wet state for future use.

[0029] Immerse one side of the wet polysulfone support membrane in an aqueous solution with a weight ratio of m-phenylenediamine of 2% for 4 minutes, roll the surface of the support membrane with a rubber roller and squeeze it dry, and mix it with pentachlorophenyl chloroformate and trimesin The weight ratio of acid chloride mixing is 1:5, and the cyclohexane solution with 0.12% by weight is contacted on one side to carry out interfacial polymerization reaction for 20 seconds. The composite film was dried in the air for 2 minutes, and then treated at 50°C for 5 minutes. Then carry out two steps of rinsing again:...

Embodiment 3

[0031] Use 16% Udel P3500 polysulfone, 0.3% water and 0.1% nonylphenol polyoxyethyl ester phosphate dissolved in N,N-dimethylformamide, scrape on the polyester non-woven fabric, and then dip into After the solvent is removed from the water, a support membrane with a molecular weight cut-off of 20,000-30,000 is obtained, which is stored in a wet state for future use.

[0032]Immerse one side of the wet polysulfone support membrane in an aqueous solution with a weight ratio of m-phenylenediamine of 2% for 5 minutes, roll the surface of the support membrane with a rubber roller and squeeze it dry, and mix it with pentachlorophenyl chloroformate / 5-oxygen The mixing ratio of formyl chloride-isophthaloyl chloride or trimesoyl chloride or 5-isocyanate-isophthaloyl chloride is 1:5, and the cyclohexane solution with 0.12% by weight is contacted on one side for interfacial polymerization reaction for 40 seconds. The composite film was dried in the air for 2 minutes, and then treated at ...

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Abstract

The invention discloses an organic composite membrane, in particular to a pollution-resistant composite membrane and a preparation method thereof. The invention compounds an aromatic polyamide lamina on a porous supporting membrane by polyamine and aromatic acyl chloride or isocyanate or oxygen formyl chloride interfacial polycondensation, the surface of the aromatic polyamide lamina has chloroformic acid pentachlorobenzene groups; polysulfone supporting membrane is directly soaked into polyamide solution, single interfacial polymerization reaction is carried out on the supporting membrane and aromatic acyl chloride solution after a rubber roll is used for rolling the surface of the supporting membrane, the supporting membrane is dried in the shade for 1-3 minutes in air, heat treatment is carried out for 3-10 minutes at 40-70 DEG C, the ultra-thin composite membrane is prepared by washing. The invention is characterized in that the prepared membrane has good bacteriostatic effect, efficient desalting property and simple preparation. The products and the method of the invention can be widely applied in the processing procedure of organic liquids.

Description

technical field [0001] The invention belongs to the field of polymer composite membranes, and specifically refers to a pollution-resistant composite membrane and a preparation method thereof. Background technique [0002] Composite membranes for water treatment have the problem of membrane fouling caused by bacterial growth in water bodies in engineering applications. The countermeasures adopted now are to carry out bactericidal treatment to membrane regularly, and special-purpose medicament cleaning (Luss, V.Gerold.Antimicrobial composition for a semipermeable.US Patent 4500517 membrane.1985-02-19) (Little, II, Roger G.Abrahamson, Susan Wong, Peter US Patent 6143516-Identification of novelantimicrobial agents using membrane potential indicator dyes. 2000-11-07.). Many membrane manufacturers have developed various bactericides for membrane products, such as non-oxidizing bactericides for reverse osmosis membranes: HY210, HY 220, HY 230 (Haideneng), TH-416 (Shandong Taihe Wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D71/82B01D69/12
Inventor 周勇金可勇高从堦
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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