High-permeability antibacterial modified polyamide reverse osmosis membrane for efficiently removing boron and preparation method of high-permeability antibacterial modified polyamide reverse osmosis membrane

A reverse osmosis membrane, high osmosis technology, applied in osmosis/dialysis water/sewage treatment, reverse osmosis, semi-permeable membrane separation, etc. The effect of strong penetration ability, increased hydrophilicity and strong anti-fouling ability

Pending Publication Date: 2020-10-09
SHENZHEN CHANGLONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing grafting modification methods are expensive, and most of them need to introduce activating groups. The grafting process is complicated and

Method used

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  • High-permeability antibacterial modified polyamide reverse osmosis membrane for efficiently removing boron and preparation method of high-permeability antibacterial modified polyamide reverse osmosis membrane
  • High-permeability antibacterial modified polyamide reverse osmosis membrane for efficiently removing boron and preparation method of high-permeability antibacterial modified polyamide reverse osmosis membrane
  • High-permeability antibacterial modified polyamide reverse osmosis membrane for efficiently removing boron and preparation method of high-permeability antibacterial modified polyamide reverse osmosis membrane

Examples

Experimental program
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Effect test

preparation example Construction

[0045](1) Preparation of aqueous phase solution: dissolving m-phenylenediamine in deionized water to obtain an aqueous phase solution with a mass concentration of 2%;

[0046] (2) Preparation of oil phase solution: dissolving trimesoyl chloride in n-hexane, and ultrasonically mixing to obtain an oil phase solution with a mass concentration of 0.1%;

[0047] (3) Interfacial polymerization reaction: pour the water phase solution on the PES / PSF membrane, contact for 120s, remove the excess water phase solution on the surface, drain the water phase solution on the surface of the membrane with a rubber roller; then pour the oil phase onto the membrane surface Solution, contact for 60s, remove excess oil phase solution on the surface, dry it naturally, put it in an oven at 80°C for 5 minutes, and obtain a self-made reverse osmosis membrane.

Embodiment 1

[0049] A kind of preparation method of the highly permeable, bacteriostatic type modified polyamide reverse osmosis membrane that is used for efficient boron removal, the steps are as follows:

[0050] (1) Pretreatment of polysulfone (PSF) membrane: since there is a layer of polyvinyl alcohol protective layer on the surface of commercial reverse osmosis membrane, before graft modification, the polysulfone (PSF) membrane is soaked in 25% isopropanol solution 0.5h, to remove the protective coating on the surface of the membrane, then rinse the isopropanol on the surface of the membrane with deionized water, and soak it in deionized water again for later use;

[0051] (2) Preparation of the activation solution: add 2-(N-morpholine)ethanesulfonate and sodium chloride into deionized water, disperse evenly by ultrasonication, and adjust the pH value to 5.0 with hydrochloric acid and sodium hydroxide solution with a concentration of 1M; Carbodiimide and N-hydroxysuccinimide are weigh...

Embodiment 2

[0075] A kind of preparation method of the highly permeable, bacteriostatic type modified polyamide reverse osmosis membrane that is used for efficient boron removal, the steps are as follows:

[0076] (1) Pretreatment of self-made reverse osmosis membrane: soak the self-made reverse osmosis membrane in deionized water for 0.5h for pretreatment;

[0077] (2) Preparation of the activation solution: add 2-(N-morpholine)ethanesulfonate and sodium chloride into deionized water, disperse evenly by ultrasonication, and adjust the pH value to 5.0 with hydrochloric acid and sodium hydroxide solution with a concentration of 1M; Carbodiimide and N-hydroxysuccinimide are weighed and dissolved in the above solution to obtain Acid buffer solution; in the buffer solution, the concentration of 2-(N-morpholine)ethanesulfonic acid is 12mM, the concentration of carbodiimide is 3mM, the concentration of N-hydroxysuccinimide is 8mM, and the concentration of sodium chloride is 0.6M;

[0078] (3) ...

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Abstract

The invention relates to a high-permeability antibacterial modified polyamide reverse osmosis membrane for efficiently removing boron and a preparation method of the high-permeability antibacterial modified polyamide reverse osmosis membrane. A polymerization modification layer is arranged on the surface of a reverse osmosis membrane, and the polymerization modification layer is obtained by the graft modification of a reverse osmosis polyamide layer with 3-amino-1, 2-propylene glycol (APD) and tobramycin (TOB). The surface of the composite membrane is subjected to chemical grafting modification, APD/TOB is successfully grafted to the surface of the reverse osmosis membrane, and the novel reverse osmosis membrane is obtained. Compared with that of a reverse osmosis membrane without graft modification, the hydrophilicity of the surface of the reverse osmosis membrane is greatly improved due to the fact that the APD and TOB contain a large amount of carboxyl, so that dirt is not prone tobeing deposited on the surface of the reverse osmosis membrane, therefore, the anti-fouling capacity of the obtained reverse osmosis membrane is enhanced, meanwhile, an original peak-valley structureon the surface of the reverse osmosis membrane is covered, and the surface roughness of the modified membrane is reduced; the smoother the membrane surface is, the fewer binding sites provided for pollutant deposition are, and the stronger the anti-pollution capacity of the composite membrane is.

Description

technical field [0001] The invention relates to a highly permeable and bacteriostatic modified polyamide reverse osmosis membrane for efficient boron removal and a preparation method thereof, belonging to the field of reverse osmosis production. Background technique [0002] Boron is one of the essential trace elements for humans, animals and plants, but excessive intake of boron will cause harm to living organisms. For example, drinking water with excessive boron content will cause reproductive and developmental problems. Plants use water with excessive boron content Irrigation will cause the leaves to wither and yellow, the fruit to rot, and in severe cases, it will lead to failure of the harvest. Therefore, my country's "Drinking Water Sanitation Standard" (GB 5749-2006) stipulates that the limit of boron in drinking water is 0.5mg / L. [0003] Reverse osmosis membranes are widely used in brackish water, seawater desalination, industrial water production and drinking wate...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D61/02B01D67/00B01D69/12C02F1/44C02F101/10
CPCB01D61/025B01D69/125B01D71/56B01D2325/36B01D2325/48C02F1/441C02F2101/108
Inventor 王志宁高宝玉王栋陈煜辉蒋璨
Owner SHENZHEN CHANGLONG TECH CO LTD
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