Preparation method and application of hybridization reverse osmosis membrane

A reverse osmosis membrane, hybrid technology, applied in chemical instruments and methods, osmosis/dialysis water/sewage treatment, reverse osmosis, etc., can solve problems such as the decline of desalination rate, the destruction of desalination layer, and the reduction of membrane service life. Ease of use, guaranteed longevity, good flux and salt rejection

Active Publication Date: 2014-12-03
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although post-treatment methods such as acidification or oxidation can increase the flux of the reverse osmosis membrane, they also damage the desalination layer, resulting in a decrease in the desalination rate of the membrane and greatly reducing the service life of the membrane.

Method used

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  • Preparation method and application of hybridization reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Take 18 parts of polysulfone, 6 parts of PEG4006 and DMF to make up to 100 parts, mix and stir to obtain a membrane-forming solution. The membrane-making solution is evenly coated on the non-woven support layer, and the excess membrane-making solution on the surface is scraped off to obtain a hybrid ultrafiltration base membrane.

[0059] The aqueous phase solution is 4 parts of m-phenylenediamine, 2 parts of triethylamine, and pure water to make up to 100 parts, and its pH value is measured to be 8. Soak the base film in the water phase solution for 60 seconds, remove excess water phase solution on the surface after taking it out.

[0060] The oil phase solution is a solution of trimesoyl chloride in ethylcyclohexane with a concentration of 0.09 wt%. Soak the above-mentioned basement membrane soaked in the aqueous phase solution in the oil phase solution for 20 seconds, then put it into an oven at 100° C. for 5 minutes, take it out, and rinse it with pure water for 20...

Embodiment 2

[0062] Take 10 parts of polysulfone, 1 part of PEG8001 and N-methylpyrrolidone to make up to 100 parts, mix and stir to obtain a membrane-forming solution. The membrane-making solution is evenly coated on the non-woven fabric support layer, and the excess membrane-making solution on the surface is scraped off with a scraper to obtain a hybrid ultrafiltration base membrane.

[0063] The aqueous phase solution is 5 parts of p-phenylenediamine, 0.5 part of sodium hydroxide, and pure water to make up to 100 parts, and the measured pH value is 10. Soak the base film in the water phase solution for 80 seconds, remove the excess water phase solution on the surface after taking it out.

[0064] The oil phase solution is a n-hexane solution of terephthaloyl chloride with a concentration of 0.2 wt%. Soak the above-mentioned basement membrane soaked in the aqueous phase solution in the oil phase solution for 40 seconds, then put it into an oven at 120° C. for 3 minutes, take it out, and...

Embodiment 3

[0066] The same process as in Example 1, except that the film-forming solution is 20 parts of polysulfone, 8 parts of polyvinylpyrrolidone, and dimethylacetamide to make up to 100 parts.

[0067] The aqueous phase solution is 0.1 part of 1,6-hexamethylenediamine, 2 parts of sodium phosphate, and pure water to make up to 100 parts, and the measured pH value is 9. Soak the base film in the water phase solution for 30 seconds, remove the excess water phase solution on the surface after taking it out.

[0068] The oil phase solution is an Isopar E solution of isophthaloyl dichloride with a concentration of 0.05 wt%. Soak the above-mentioned basement membrane soaked in the aqueous phase solution in the oil phase solution for 60 seconds, then put it into an oven at 50° C. for 10 minutes, take it out, and rinse it with pure water for 20 minutes to obtain a hybrid reverse osmosis membrane.

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Abstract

The invention provides a preparation method of a hybridization reverse osmosis membrane. The preparation method of the hybridization reverse osmosis membrane comprises the following steps: taking 10-20 parts of polysulfone, a pore-forming agent and a nano porous material so as to prepare a membrane preparation solution, then coating the membrane preparation solution on a support layer uniformly, removing the residual membrane preparation solution so as to obtain a hybridization ultrafiltration base membrane, then soaking the hybridization ultrafiltration base membrane in a water phase solution, taking out, and removing the residual water phase solution on the surface, wherein the water phase solution contains aromatic polyamine, aliphatic polyamine and / or alicyclic polyamine; soaking the obtained product into an oil phase solution, taking out, drying, and rinsing so as to obtain the hybridization reverse osmosis membrane. The acidification or oxidation and other after-treatment methods are not required for the preparation method of the hybridization reverse osmosis membrane; the desalting rate is prevented from being decreased due to the damage to a desalting layer; the service life of the membrane is ensured, and meanwhile, good flux and desalting rate are kept; moreover, the method is simple and convenient, and can be used for industrial production.

Description

【Technical field】 [0001] The invention relates to a reverse osmosis membrane, in particular to a method for preparing a hybridized reverse osmosis membrane and the use of the reverse osmosis membrane obtained by the method. 【Background technique】 [0002] 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 consumption, no pollution, simple process, and easy operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D69/10B01D67/00B01D61/08C02F1/44
Inventor 陈亦力孟莎莎代攀李锁定彭兴峥关晶
Owner BEIJING ORIGIN WATER FILM TECH
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