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Preparation method of modified pollution-resistant hybridized reverse osmosis membrane

A reverse osmosis membrane and anti-pollution technology, applied in chemical instruments and methods, semi-permeable membrane separation, membranes, etc., can solve the problems that membrane materials are difficult to meet the needs of practical applications, and achieve improved industrial practical range, excellent performance, and improved The Effect of Pollution Resistance

Active Publication Date: 2018-02-16
VONTRON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In recent years, with the wide application of permeable membranes in the field of water treatment, higher requirements have been put forward for the performance of membranes, such as permeability, anti-pollution, chemical and thermal stability, etc., and traditional membrane materials are becoming more and more difficult to meet. Practical application needs

Method used

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  • Preparation method of modified pollution-resistant hybridized reverse osmosis membrane
  • Preparation method of modified pollution-resistant hybridized reverse osmosis membrane
  • Preparation method of modified pollution-resistant hybridized reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of polymer solution: disperse 38g of polysulfone and 6g of methylcellulose in 156g of N,N-dimethylformamide (DMF) solvent, stir at 150°C for 6h to dissolve, and then carry out vacuum static Set it for defoaming for 2h to obtain a polymer solution.

[0029] (2) Preparation of base film: the polymer solution in step (1) is prepared on a non-woven fabric through a liquid-solid phase conversion method to prepare a porous polymer support layer. The phase inversion time was controlled to be 0.5 min, the temperature of the water bath was 18°C, the temperature of the thermal curing water bath was 80°C, and the film thickness was 5.5mil.

[0030] (3) soaking the polymer base film in step (2) in deionized water for preservation, and completing the preparation of the porous support layer base film;

[0031] (4) Dissolve 30g of m-phenylenediamine and 3g of sodium hydroxide in 967g of deionized water, stir and dissolve completely to obtain a water phase solution; so...

Embodiment 2

[0036] (1) Preparation of polymer solution: Disperse 38g of polyethersulfone and 6g of methylcellulose in 156g of N,N-dimethylformamide (DMF) solvent, stir at 150°C for 6h to dissolve, and vacuum the resulting solution Stand for defoaming for 4 hours to obtain a polymer solution.

[0037] (2) Preparation of base film: the polymer solution in step (1) is prepared on a non-woven fabric through a liquid-solid phase conversion method to prepare a porous polymer support layer. The phase inversion time was controlled to be 1 min, the temperature of the water bath was 15°C, the temperature of the thermal curing water bath was 70°C, and the film thickness was 5.5mil.

[0038] (3)-(4) are the same as embodiment 1.

[0039] (5) 2.0g trimesoyl chloride is dissolved in 998g organic solvent, and described organic solvent is that normal hexane, sherwood oil, heptane, Isopar-L are mixed according to volume ratio 0.7:4:1.2:3.8, stir Dissolve to obtain an oil phase solution; add 4g inorganic...

Embodiment 3

[0043] Steps (1)-(4) are the same as in Example 1. The inorganic nanoparticles are graphene oxide nanoparticles, nano Ag, nano SiO 2 , Mixed according to the mass ratio of 2-4:0.6-1.0:0.1-0.2.

[0044] (5) 2.0g trimesoyl chloride is dissolved in 998g organic solvent, and described organic solvent is that normal hexane, sherwood oil, heptane, Isopar-L are mixed according to volume ratio 1.2:5:2:4, stir Dissolving to obtain an oil phase solution; adding 5g inorganic nanoparticles to the oil phase solution, the inorganic nanoparticles are graphene oxide nanoparticles, nano-Ag, nano-SiO 2 , mixed according to the mass ratio of 4:1.0:0.2, ultrasonically vibrated for 3 hours, so that the inorganic nanoparticles are evenly dispersed in the oil phase solution; the basement film soaked in the water phase solution in step (4) is soaked in the oil phase solution 1min.

[0045] (6) 60g NH 2 -PEG-OH was dissolved in 940g deionized water; the composite film after the interfacial reactio...

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Abstract

The invention belongs to the technical field of composite reverse osmosis membranes and particularly relates to a preparation method of a modified pollution-resistant hybridized reverse osmosis membrane. According to the preparation method, by introducing a combined inorganic nano-particle of a graphene oxide nano-particle, nano-Ag and nano-SiO2 an dissolving the combined inorganic nano-particle by virtue of a compound organic solvent, the result shows that an inorganic nano-material has relatively good dispersity in a polymer film matrix and further has relatively good consistency between twophases of the inorganic nano-particle and a polymer. A polyamide functional layer is hybridized and is grafted with hydrophilous an NH2-PEG-OH molecular chain through chemical reaction, so that the hydrophily of a membrane is improved, and the prepared composite membrane has relatively excellent antibacterial property, pollution resistance and thermal stability and further has huge prospects in industrial water treatment.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis composite membranes, and in particular relates to a preparation method of a modified pollution-resistant hybrid reverse osmosis membrane. Background technique [0002] The scarcity of water resources and serious water pollution are one of the major problems facing mankind today. Reverse osmosis membrane separation technology is widely used in wastewater treatment, seawater desalination, drinking water purification and other fields due to its advantages such as simple operation, no need for chemical additives, low energy consumption, and easy scale-up. Currently, polyamide reverse osmosis membranes dominate the reverse osmosis membrane applications. However, the low performance of anti-oxidation and pollution resistance of polyamide reverse osmosis membrane greatly limits the development of polyamide reverse osmosis membrane in industrial application. [0003] Membrane fouling mainly incl...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D69/12B01D69/10B01D67/00
CPCB01D67/0002B01D69/10B01D69/12B01D71/56B01D2325/48
Inventor 刘仕忠许国杨方俊梁松苗
Owner VONTRON TECH CO LTD
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