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Membranes having antibiotic and hydrophilic properties and preparation method thereof

A hydrophilic compound and performance technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problem of continuous improvement of antimicrobial performance and hydrophilicity of ultrafiltration membranes, high water permeability and solute retention that are difficult to predict High efficiency, difficult to predict antimicrobial performance and other issues, to achieve excellent antimicrobial performance and hydrophilic performance, excellent mechanical strength, high mechanical strength

Active Publication Date: 2017-02-22
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, by introducing fillers, the mechanical strength and hydrophilicity of ultrafiltration membranes are slightly improved, but the disadvantage is that it is difficult to expect continuous improvement of antimicrobial properties and hydrophilicity of ultrafiltration membranes
In addition, hydrophilicity has been improved, and stain resistance and chemical resistance have been improved by a method of coating an ultrafiltration membrane with titanium dioxide (Official Gazette of Korean Patent No. 10-0543573) or by adding titanium dioxide to a casting solution The method of preparing ultrafiltration membranes (Korean Patent No. 10-0536643), etc. have been slightly improved, but antimicrobial performance and high water permeability and solute rejection are difficult to expect

Method used

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  • Membranes having antibiotic and hydrophilic properties and preparation method thereof
  • Membranes having antibiotic and hydrophilic properties and preparation method thereof
  • Membranes having antibiotic and hydrophilic properties and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1. Preparation of sulfadiazine-grafted silica nanoparticles (SD-g-silica)

[0050] The antimicrobial organic compound sulfadiazine (SD)-grafted silica nanoparticles were prepared by a reaction involving the following four steps.

[0051] (1) Silica nanoparticles (1 g) having a particle size of 40 nm were dispersed in an aqueous NaOH solution (100 ml) having a concentration of 1 mole, and the resulting mixture was reacted for 1 hour to form hydroxyl groups on the surface of the particles.

[0052] (2) In order to form amine groups chemically bonded to hydroxyl groups collected by centrifugation and drying on the surface of silica nanoparticles, the silica nanoparticles were dispersed in water (100 ml), and then 3-aminopropyl Triethoxysilane (1 g) was put therein, and the resulting mixture was reacted at 70° C. for 24 hours to prepare 3-aminopropyltriethoxysilane-grafted silica nanoparticles.

[0053] (3) In order to induce a reaction between amine groups present...

Embodiment 2

[0055] Example 2. Preparation of polysulfadiazine acrylamide grafted silica nanoparticles (PSA-g-silica)

[0056] (1) Silica nanoparticles (5 g) having a particle size of 40 nm were dispersed in an aqueous NaOH solution (100 ml) having a concentration of 1 mole, and the resulting mixture was reacted for 1 hour to form hydroxyl groups on the surface of the particles.

[0057] (2) In order to form vinyl groups on the surface of silica nanoparticles, methanol (200ml), water (180ml) and catalyst NH 4 Add gamma-methacryloxypropyltrimethoxysilane (gamma-MPS, 1g) in OH (0.5mol), then add the silicon dioxide particle (10g) that the particle size that is combined with hydroxyl group is 40nm therein, will The resulting mixture was put into an oil bath whose temperature was controlled at 30° C. and reacted for 2 hours to prepare γ-MPS grafted silica nanoparticles.

[0058] (3) In order to prepare the antimicrobial organic compound polysulfadiazine acrylamide-grafted silica nanoparticles...

Embodiment 3

[0059] Example 3. Preparation of sulfanilamide-grafted silica nanoparticles (ABSA-g-silica)

[0060] Put N-acetylsulfamoyl chloride (1.5g) into ethanol (100ml) and stir to dissolve, then add 1g of 3-aminopropyltriethoxysilane grafted carbon dioxide prepared in Example 1 Silicon nanoparticles to disperse the mixture. 3 ml of pyridine was put thereinto, and then the mixture was reacted at 60° C. for 24 hours to prepare acetylsulfonamide-grafted silica nanoparticles. The thus prepared acetylsulfonamide-grafted silica nanoparticles were treated with 10% aqueous hydrochloric acid to reduce the terminal methylamides to amine groups, thereby preparing sulfanilamide-grafted silica nanoparticles Granules (ABSA-g-Silica).

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Abstract

The present invention relates to a separation membrane having both antibiotic and hydrophilic properties for water treatment and a preparation method thereof. In the separation membrane of the present invention, since an organic compound (antimicrobial and / or hydrophilic compound) is chemically conjugated to non-metal inorganic nanoparticles or metal nanoparticles, the nanoparticles are not eluted from the separation membrane even when the separation membrane is used for water treatment for a long period of time, so that the separation membrane may continuously maintain antimicrobial properties and high water permeability, is safe to the human body even when used for the treatment of drinking water, such as water purification, and exhibits characteristics in which stain resistance is also significantly enhanced due to antimicrobial and hydrophilic properties, which have been continuously imparted. Furthermore, high mechanical strength is exhibited by a metal or inorganic nanofiller introduced.

Description

technical field [0001] The invention relates to a separation membrane for water treatment with antibacterial and hydrophilic properties and a preparation method thereof. Background technique [0002] Existing hollow fiber preparation methods include the steps of preparing a membrane-forming solution by dissolving a polymer material in a solvent, and preparing a porous separation membrane by precipitating it in a non-solvent to induce a phase transition. In order for hollow fiber membranes to be effectively used for water treatment and the like, characteristics such as antimicrobial performance, high rejection rate and water permeability, fouling resistance, and mechanical strength to withstand operating pressure are required. Generally, in order to prepare hollow fiber membranes (including ultrafiltration membranes), polysulfone, polyethersulfone (PES), polyacrylonitrile or polyvinylidene fluoride (PVDF), etc. are often used. Ultrafiltration membranes prepared by using thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/00
CPCB01D61/147B01D71/34B01D71/42C02F1/505C02F2303/04C02F2303/20B01D69/02B01D69/148B01D71/68B01D2323/36B01D2325/36B01D2325/48C02F1/444C02F2305/08B01D71/421B01D67/0002B01D2325/24
Inventor 金相润李俊硕金兑映金昌槿
Owner LG ELECTRONICS INC
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