Compound reverse-osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and interfacial polymerization, applied in the field of water treatment

Inactive Publication Date: 2016-07-06
博通分离膜技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technology of preparing composite reverse osmosis membrane by aquaporin technology and traditional method ha

Method used

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  • Compound reverse-osmosis membrane and preparation method thereof
  • Compound reverse-osmosis membrane and preparation method thereof
  • Compound reverse-osmosis membrane and preparation method thereof

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[0027] The embodiment of the present invention discloses a preparation method of a composite reverse osmosis membrane, comprising:

[0028] The support layer arranged on the substrate is coated with polyamine aqueous solution, vesicle solution containing aquaporin and polyacyl chloride organic solution in sequence, and after interfacial polymerization reaction, post-treatment is carried out to obtain a composite reverse osmosis membrane.

[0029] The application provides a method for preparing a composite reverse osmosis membrane, which is coated with an aqueous solution containing polyamines on the support layer, and then coated with a layer of vesicle solution containing aquaporins, and finally mixed with polyacyl chlorides The organic solution undergoes interfacial polymerization to form a desalination layer of vesicles embedded with aquaporin, thereby improving the water flux and desalination rate of the composite reverse osmosis membrane.

[0030] In the process of prepar...

Embodiment 1～5

[0044] Prepare 3.5% m-phenylenediamine aqueous solution and 0.1% sodium dodecylsulfonate, adjust the pH to 12 with NaOH to obtain an aqueous phase solution, coat the solution on the polysulfone porous support layer, and stay for 1 Minutes, then remove excess aqueous solution on the surface of the support layer; the vesicle solution containing AQP is coated on the porous support layer containing amine, the concentration of vesicles is 0.08mg / ml, adjust the molar ratio of protein and vesicles (as shown in Table 1), after purging with nitrogen to remove excess aqueous solution on the surface of the support layer, the cyclohexane solution of 0.08% trimesoyl chloride by mass percent is coated on the above-mentioned polysulfone porous support layer containing m-phenylenediamine and AQP Above, the interfacial polymerization reaction between m-phenylenediamine and trimesoyl chloride occurred for 30 seconds and then stood upright to dry naturally to obtain a reverse osmosis composite me...

Embodiment 6～16

[0056] Prepare 3.5% m-phenylenediamine aqueous solution and 0.1% sodium dodecylsulfonate, adjust the pH to 12 with NaOH to obtain an aqueous phase solution, coat the solution on the polysulfone porous support layer, and stay for 1 minute , then remove excess aqueous solution on the surface of the support layer, coat the vesicle solution containing AQP on the porous support layer containing amine, wherein the molar ratio of protein to vesicles is 1:50, adjust the concentration of vesicles (as shown in Table 2 shown), after nitrogen purging was used to remove excess aqueous solution on the surface of the support layer, the cyclohexane solution of trimesoyl chloride with a mass percentage of 0.08% was coated on the above-mentioned polysulfone porous support layer containing m-phenylenediamine and AQP , m-phenylenediamine and trimesoyl chloride have an interfacial polymerization reaction for 30 seconds and then stand upright to dry naturally to obtain a reverse osmosis composite me...

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Abstract

The invention provides a preparation method of a compound reverse-osmosis membrane. The method includes the steps of sequentially coating a supporting layer of a substrate with a polyamine water solution, a vesica solution containing aquaporins, and a polyacyl chloride organic solution, and conducting post-treatment after interfacial polymerization reaction to obtain the compound reverse-osmosis membrane. The polymer porous supporting layer where polyamine is adsorbed is coated with the vesica solution containing aquaporins, and interfacial polymerization is conducted on the supporting layer and the polyacyl chloride organic solution to obtain the compound reverse-osmosis membrane. It is shown through experiment results that the prepared compound reverse-osmosis membrane has a desalinization ratio of 99.3% or above at the temperature of 25 DEG C, the pressure of 5 bar and the water flux of 15 LMH/bar(45GFD) or above under the testing condition of a water solution with 500 ppm of sodium chloride and pH of 6.5.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a composite reverse osmosis membrane and a preparation method thereof. Background technique [0002] Membrane separation technology is the fastest-growing new technology in the current water treatment industry. As the water treatment membrane with the highest filtration precision, reverse osmosis membrane has the characteristics of high desalination rate, and is widely used in water purification, sewage reuse, brackish water desalination and seawater desalination. At present, most reverse osmosis membranes, especially commercial reverse osmosis membranes, are generally prepared by interfacial polymerization of polyamines and polyacyl chlorides. [0003] In 1981, the American FilmTec. company published the patent US4277344, which announced the use of m-phenylenediamine and trimesoyl chloride to prepare a composite reverse osmosis membrane with high water flux and desalina...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D69/12B01D69/02B01D67/00
CPCB01D67/0006B01D69/02B01D69/12B01D71/82B01D2325/24
Inventor 张强邹昊梁剑邹宗喜闫成云史继岩刘莎莎
Owner 博通分离膜技术(北京)有限公司
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