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Preparation method of polyamide reverse osmosis membrane modified by graphene oxide subjected to acylating chlorination, modified reverse osmosis membrane and application thereof

An oxychloride, reverse osmosis membrane technology, applied in chemical instruments and methods, osmosis/dialysis water/sewage treatment, reverse osmosis, etc., can solve the problem of lack of antibacterial properties, and achieve easy operation, low energy consumption, and water quality. Good results

Active Publication Date: 2017-01-04
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The membrane has high water flux and high salt rejection, however, it does not have antibacterial properties

Method used

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  • Preparation method of polyamide reverse osmosis membrane modified by graphene oxide subjected to acylating chlorination, modified reverse osmosis membrane and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Aqueous phase solution: 10% by weight m-phenylenediamine aqueous solution

[0051] Oil phase solution: 1% by weight of trimesoyl chloride in n-hexane

[0052] Preparation of modifier: prepare 0.1g / L single-layer graphene with a sheet diameter of 50nm + 0.5g / L Isopar E solution of thionyl chloride, mix well, and remove thionyl chloride by rotary evaporation at -0.1MPa and 60°C Get modifiers.

[0053] Soak the polysulfone ultrafiltration membrane in the water phase solution for 20s, remove the excess solution after taking it out; then soak it in the oil phase solution for 20s, remove the excess solution after taking it out; then soak it in the modifier for 120s, and then bake it at 60°C Dry for 240s to obtain the polyamide reverse osmosis membrane 1 modified by acyl chloride graphene oxide.

Embodiment 2

[0055] Aqueous phase solution: 5% by weight m-phenylenediamine aqueous solution

[0056] Oil phase solution: 2% by weight isophthaloyl dichloride in cyclohexane

[0057] Preparation of modifier: prepare 0.5g / L single-layer graphene with a sheet diameter of 20nm + 0.1g / L Isopar E solution of thionyl chloride, mix well, and remove thionyl chloride by rotary evaporation at -0.5MPa, 80°C Get modifiers.

[0058] Soak the polysulfone ultrafiltration membrane in the water phase solution for 60s, remove the excess solution after taking it out; then soak it in the oil phase solution for 60s, remove the excess solution after taking it out; then soak it in the modifier for 1800s, and then bake it at 100°C Dry for 100s to obtain the polyamide reverse osmosis membrane 2 modified by acyl chloride graphene oxide.

Embodiment 3

[0060] Aqueous phase solution: 0.1% by weight p-phenylenediamine aqueous solution

[0061] Oil phase solution: n-hexane solution of 0.02% by weight phthaloyl chloride

[0062] Preparation of modifier: Prepare 5g / L single-layer graphene oxide with a sheet diameter of 10nm + 1g / L Isopar G solution of thionyl chloride, mix well and remove thionyl chloride by rotary evaporation at -0.5MPa and 80°C to obtain Modifier.

[0063] Soak the polysulfone ultrafiltration membrane in the water phase solution for 30s, remove the excess solution after taking it out; then soak it in the oil phase solution for 30s, remove the excess solution after taking it out; then soak it in the modifier for 1200s, and then bake it at 80°C Dry for 80s to obtain the polyamide reverse osmosis membrane 3 modified by acyl chloride graphene oxide.

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Abstract

The invention provides a preparation method of a polyamide reverse osmosis membrane modified by graphene oxide subjected to acylating chlorination. The preparation method includes soaking a supporting layer in a water-phase solution containing a polyfunctional aromatic amine compound and then in an oil-phase solution of polyfunctional group acyl chloride; soaking a product in a modifier solution containing graphene and thionyl chloride in an isoparaffin solvent, wherein the graphene refers to monolayer graphene or monolayer graphene oxide; drying to obtain the polyamide reverse osmosis membrane modified by the graphene oxide subjected to acylating chlorination. The preparation method has the advantages that the graphene oxide subjected to acylating chlorination is grafted on the surface of a polysulfone ultrafiltration membrane successfully through selection of a specific monolayer graphene material, and accordingly water flux and salt removing rate of the reverse osmosis membrane are guaranteed while good antibacterial performance is achieved.

Description

[0001] 【Technical field】 [0002] The invention relates to a reverse osmosis membrane, in particular to a method for preparing a graphene-modified reverse osmosis membrane with antibacterial properties, and an application of the reverse osmosis membrane obtained by the method. [0003] 【Background technique】 [0004] Reverse osmosis membranes are widely used in the field of water treatment, and most of the current commercial membranes are polyamide composite membranes. For example, the commonly used polyamide reverse osmosis membrane, its technical principle is to separate these substances from water based on the fact that other substances cannot pass through the semi-permeable membrane under the action of the osmotic pressure higher than the solution. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water, and has the advantages of good water quality, low energy...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/02B01D67/00B01D61/02C02F1/44
CPCB01D61/025B01D67/0079B01D69/02B01D71/78B01D2325/48C02F1/441
Inventor 陈亦力夏建中彭文娟丑树人李锁定
Owner BEIJING ORIGIN WATER FILM TECH
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