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Method for producing organic-inorganic hybrid membrane by enzyme induction

A hybrid membrane and enzyme-induced technology, applied in the field of membrane separation, can solve the problems of biological enzymes regulating the growth of calcium carbonate and difficulty in meeting water quality requirements, and achieve the effect of enhancing hydrophilicity and improving membrane flux

Active Publication Date: 2017-12-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the continuous deterioration of water sources, traditional coagulation, sedimentation, filtration and disinfection treatment processes have been difficult to meet people's requirements for water quality
However, there is no report on the use of biological enzymes to regulate the growth of calcium carbonate to prepare organic-inorganic hybrid membranes.

Method used

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  • Method for producing organic-inorganic hybrid membrane by enzyme induction
  • Method for producing organic-inorganic hybrid membrane by enzyme induction
  • Method for producing organic-inorganic hybrid membrane by enzyme induction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Polyethyleneimine and sodium polystyrene sulfonate were prepared into 0.1wt% aqueous solution respectively, and after stirring and defoaming treatment, they were prepared into film-making liquid;

[0044] (2) Hydrolyze the PAN base film with 0.2mol / L NaOH aqueous solution at 30°C for 60 minutes, rinse it with deionized water several times, and dry it for use;

[0045] (3) Soak the PAN base film obtained in (2) in polyethyleneimine aqueous solution for 30 minutes to form a polycationic film, and rinse it several times with deionized water;

[0046] (4) Soak the membrane obtained in (3) in an aqueous solution of sodium polystyrene sulfonate for 30 minutes, so that polyanions and polycations react to form a single-layer polyelectrolyte separation membrane, and then rinse several times with deionized water ;

[0047] (5) Preparation of mixed solution

[0048] (a) Prepare polyethyleneimine and sodium polystyrene sulfonate with 0.1wt% aqueous solution respectively, and ...

Embodiment 2

[0060] (1) Polyethyleneimine and sodium polystyrene sulfonate were prepared into 0.1wt% aqueous solution respectively, and after stirring and defoaming treatment, they were prepared into film-making liquid;

[0061] (2) Hydrolyze the PAN base film with 0.2mol / L NaOH aqueous solution at 30°C for 60 minutes, rinse it with deionized water several times, and dry it for use;

[0062] (3) Soak the PAN base film obtained in (2) in polyethyleneimine aqueous solution for 30 minutes to form a polycationic film, and rinse it several times with deionized water;

[0063] (4) Soak the membrane obtained in (3) in an aqueous solution of sodium polystyrene sulfonate for 30 minutes, so that polyanions and polycations react to form a single-layer polyelectrolyte separation membrane, and then rinse several times with deionized water ;

[0064] (5) Preparation of mixed solution

[0065] (a) Prepare polyethyleneimine and sodium polystyrene sulfonate with 0.1wt% aqueous solution respectively, and ...

Embodiment 3

[0077] (1) Polyethyleneimine and sodium polystyrene sulfonate were prepared into 0.1wt% aqueous solution respectively, and after stirring and defoaming treatment, they were prepared into film-making liquid;

[0078] (2) Hydrolyze the PAN base film with 0.2mol / L NaOH aqueous solution at 30°C for 60 minutes, rinse it with deionized water several times, and dry it for use;

[0079] (3) Soak the PAN base film obtained in (2) in polyethyleneimine aqueous solution for 30 minutes to form a polycationic film, and rinse it several times with deionized water;

[0080] (4) Soak the membrane obtained in (3) in an aqueous solution of sodium polystyrene sulfonate for 30 minutes, so that polyanions and polycations react to form a single-layer polyelectrolyte separation membrane, and then rinse several times with deionized water ;

[0081] (5) Preparation of mixed solution

[0082] (a) Prepare polyethyleneimine and sodium polystyrene sulfonate with 0.1wt% aqueous solution respectively, and ...

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Abstract

A method for or producing an organic-inorganic hybrid membrane by enzyme induction belongs to the technical field of membrane separation and comprises steps: firstly, assembling a plurality of layers of cationic polyelectrolyte and anionic polyelectrolyte alternately on the surface of a treated membrane to obtain a membrane 1; secondly assembling a plurality of layers of cationic polyelectrolyte, calcium salt and anionic polyelectrolyte and urease alternately on the surface of the membrane 1 to obtain a membrane 2; and finally soaking the membrane 2 in a urea solution, catalyzing urea in the urea solution by the urease in the membrane 2 to generate carbon dioxide, and then reacting with calcium salt on the surface of the membrane 2 to obtain calcium carbonate particles. The obtained calcium carbonate particles can effectively enhance the hydrophilic performance of the surface of the membrane, so that the membrane flux is increased.

Description

technical field [0001] The invention relates to a method for preparing an organic-inorganic hybrid membrane by enzyme induction, and belongs to the technical field of membrane separation. Background technique [0002] In recent years, due to the rapid development of my country's economy, the acceleration of urbanization and industrialization, a large amount of industrial and domestic wastewater has been discharged into water bodies, which has polluted drinking water sources. Due to the continuous deterioration of water sources, traditional coagulation, sedimentation, filtration and disinfection treatment processes have been difficult to meet people's requirements for water quality. In the upgrading of drinking water treatment process, compared with traditional water treatment process, membrane separation technology has gradually highlighted its own advantages, among which nanofiltration membrane has been widely regarded as the most promising drinking water treatment technolo...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D61/02B01D71/42B01D71/60B01D71/66B01D61/14B01D61/58C02F1/44C12P3/00
CPCB01D61/027B01D61/145B01D61/58B01D67/0079B01D67/0088B01D67/0095B01D69/12B01D69/125B01D71/42B01D71/60B01D71/66B01D2323/08B01D2323/10C02F1/442C02F1/444C12P3/00
Inventor 秦振平裴峥单玲珑郭红霞纪树兰
Owner BEIJING UNIV OF TECH
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