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Preparation method of high-throughput anti-pollution composite nanofiltration membrane

A composite nanofiltration membrane and anti-pollution technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as poor long-term use effect and unsatisfactory anti-pollution ability, and achieve good industrial applicability , Improve flux and anti-pollution ability, easy to operate

Active Publication Date: 2015-06-03
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technical solution is that the anti-pollution ability is not ideal enough, and the long-term use effect is not good

Method used

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  • Preparation method of high-throughput anti-pollution composite nanofiltration membrane
  • Preparation method of high-throughput anti-pollution composite nanofiltration membrane
  • Preparation method of high-throughput anti-pollution composite nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of polymer solution: Prepare 0.05wt% nano-titanium dioxide dispersion (the solid content of the dispersion is 20%, the solvent is water, and the particle size is 15nm) and evenly disperse it in the polysulfone polymer solution, stirring at high speed for 1.25h, Then add the polymer and continue to stir for 8 hours, the temperature of the polymer solution is controlled at 90°C; after the preparation of the polymer solution is completed, high-temperature defoaming is carried out, and the temperature is lowered to 25°C;

[0031] (2) Preparation of a porous polymer support layer: the polymer solution in step (1) is prepared by a liquid-solid phase conversion method to prepare a porous polymer support layer;

[0032] (3) Prepare A solution: Prepare 2.0wt% piperazine and 0.005wt% sodium dodecylbenzenesulfonate and dissolve them uniformly in pure water, and add an appropriate amount of NaOH to adjust the pH value to 11 to prepare A solution;

[0033] (4) Prepar...

Embodiment 2

[0036] (1) Preparation of polymer solution: Prepare 0.05wt% nano-titanium dioxide dispersion (the solid content of the dispersion is 20%, the solvent is isopropanol, and the particle size is 50nm) and evenly disperse it in the polysulfone polymer solvent, stirring at a high speed for 1.25 h, then add the polymer and continue to stir for 8 hours, the temperature of the polymer solution is controlled at 90°C; after the preparation of the polymer solution is completed, high-temperature defoaming is performed, and the temperature is lowered to 25°C;

[0037] (2) Preparation of a porous polymer support layer: the polymer solution in step (1) is prepared by a liquid-solid phase conversion method to prepare a porous polymer support layer;

[0038] (3) Prepare A solution: prepare 2.0wt% piperazine and 0.01wt% sodium dodecylbenzenesulfonate and dissolve them in pure water evenly, and add an appropriate amount of NaOH to adjust the pH value to 11 to prepare A solution;

[0039] (4) Prep...

Embodiment 3

[0042] (1) Preparation of polymer solution: Prepare 0.20wt% nano-silica dispersion (the solid content of the dispersion is 20%, the solvent is isopropanol, and the particle size is 20nm) and evenly disperse it in the polyimide polymer solution , stirred at high speed for 1.25 hours, then added the polymer and continued to stir for 8 hours, the temperature of the polymer solution was controlled at 90°C; after the polymer solution was prepared, high-temperature defoaming was carried out, and the temperature was lowered to 25°C;

[0043] (2) Preparation of a porous polymer support layer: the polymer solution in step (1) is prepared by a liquid-solid phase conversion method to prepare a porous polymer support layer;

[0044] (3) Prepare A solution: Prepare 2.0wt% piperazine and 0.005wt% sodium lauryl sulfate and dissolve them in pure water evenly, and add an appropriate amount of NaOH to adjust the pH value to 11, that is, A solution is prepared;

[0045] (4) Prepare B solution: p...

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Abstract

The invention discloses a preparation method of a high-throughput anti-pollution composite nanofiltration membrane. The preparation method comprises the following steps: inorganic nanoparticles are uniformly dispersed in a porous polymer supporting layer, a surface active agent is added in solution A, a polyamide layer is prepared on the porous polymer supporting layer through interfacial polymerization, hot water soaking treatment and glycerol moisturization treatment are adopted, and then drying is performed, and thus, the high-throughput anti-pollution composite nanofiltration membrane is prepared. According to the method, the porous supporting layer microstructure is changed by inorganic nano particles, the surface active agent is added in the solution A, and the flux and the antifouling property of the composite nanofiltration membrane are improved. The preparation method is easy, the raw material is cheap, the preparation process is simple and the method has good industrial applicability.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a preparation method of a high-throughput anti-pollution composite nanofiltration membrane. Background technique [0002] Membrane separation technology is a method of separating, fractionating and purifying component solutes and solvents by using the difference in selective permeation properties of membranes for each component. Nanofiltration membrane is a functional semi-permeable membrane that allows solvent molecules or some low-molecular-weight solutes or low-priced ions to pass through. Currently, membrane separation technology is facing many challenges in practical application, the most prominent of which is the decline in permeate flux caused by membrane fouling. During the membrane separation process, the membrane components must be cleaned physically or chemically frequently, and frequent cleaning not only leads to an increase in cost, but also causes a decrease in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/68B01D71/56B01D71/26B01D71/16B01D67/00
Inventor 梁松苗许国杨吴宗策方俊陆宝春
Owner VONTRON TECH CO LTD
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