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A kind of reverse osmosis membrane and its preparation method and application

A technology of reverse osmosis membrane and base membrane, which is used in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of poor water permeation speed and good salt repellency, and achieve easy preparation and operation. The effect of good dispersion and high water permeability

Active Publication Date: 2021-07-09
中科瑞阳膜技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some polymer materials have good repellency to salt, but the water penetration rate is not good

Method used

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  • A kind of reverse osmosis membrane and its preparation method and application
  • A kind of reverse osmosis membrane and its preparation method and application

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Experimental program
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Embodiment Construction

[0017] Below in conjunction with specific embodiment, further illustrate the present invention.

[0018] A method for preparing a reverse osmosis membrane, characterized in that the method comprises the following steps:

[0019] Step 1, mixing N,N-dimethylformamide, polyvinylpyrrolidone, trimesoyl chloride and cyclohexane, stirring at room temperature for 5-10 hours, raising the temperature to 40-60°C for 5-10 hours to obtain a mixed solution, spare;

[0020] Step 2. Immerse the base membrane of the reverse osmosis membrane in the above mixed solution, keep it for 20-30 minutes, take it out for vacuum drying, and then immerse it in the mixed solution after drying, and repeat the above steps 2-3 times to obtain a dried membrane;

[0021] Step 3: Place the dried membrane in 50°C deionized water, wash it 2-3 times, and finally dry it in an oven at 80°C for 30-60 minutes to obtain a reverse osmosis membrane.

[0022] The mass ratio of N,N-dimethylformamide, polyvinylpyrrolidone,...

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Abstract

A method for preparing a reverse osmosis membrane. The base membrane of the reverse osmosis membrane is immersed in a mixed solution, and the drying and immersion are repeated to obtain a dried membrane. After washing with deionized water for 2-3 times, the reverse osmosis membrane is obtained after drying. . The reverse osmosis membrane of the invention has the characteristics of easy preparation and operation, high water permeability, high salt retardation rate and long service life.

Description

technical field [0001] The invention relates to a reverse osmosis membrane and its preparation method and application. Background technique [0002] Reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane, and is the core component of reverse osmosis technology. The principle of reverse osmosis technology 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. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation. [0003] The reverse osmosis membrane is the core component to realize reverse osmosis. It i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D67/00B01D69/02B01D71/66B01D71/68C02F1/44
CPCB01D61/025B01D67/0002B01D69/02B01D71/66B01D71/68B01D2325/36C02F1/441
Inventor 冯广义
Owner 中科瑞阳膜技术(北京)有限公司