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Method for in situ generating inorganic nano particles-polyelectrolyte hybrid membrane

A technology of inorganic nanoparticles and polyelectrolytes, applied in the field of membrane separation, can solve the problems of mechanical strength and resistance to organic solvents to be further improved, and achieve the effects of convenient operation, high separation performance and simple process

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the material of the separation membrane, the organic membrane has good flexibility, good film-forming performance, high selectivity, and many varieties, but its thermal stability, mechanical strength and organic solvent resistance need to be further improved.

Method used

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  • Method for in situ generating inorganic nano particles-polyelectrolyte hybrid membrane
  • Method for in situ generating inorganic nano particles-polyelectrolyte hybrid membrane

Examples

Experimental program
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specific Embodiment 1

[0022] The flat polyacrylonitrile (PAN) ultrafiltration membrane is used as the base membrane, the molecular weight cut off is 20000, and the membrane area is 28cm 2 , the polycationic material used is polyethyleneimine (PEI, with a molecular weight of 60,000), the polyanion is polyacrylic acid (PAA, with a molecular weight of 4 million), di(2-hydroxypropionic acid) diammonium titanium hydroxide (TiBisLac , Molecular weight is 294.08), the solvent of polyethylenimine and polyacrylic acid is water.

[0023] Assembly conditions and methods:

[0024] (1) Polyethyleneimine is made into 500ml of a 0.5wt% solution with deionized water, and polyacrylic acid is made into 500ml of a 0.05wt% solution, and left to stand for degassing respectively;

[0025] (2) In order to charge the surface of the polyacrylonitrile support membrane, conventional hydrolysis modification technology is adopted. Firstly, when the temperature is 65°C, the polypropylene membrane ultrafiltration membrane is im...

specific Embodiment 2

[0033] The base membrane is made of polyacrylonitrile (PAN) material, a flat ultrafiltration membrane with a molecular weight cut-off of 20,000 and a membrane area of ​​28cm 2 , the polycationic material used is polyethyleneimine (PEI, with a molecular weight of 60,000), the polyanion is polyacrylic acid (PAA, with a molecular weight of 4 million), di(2-hydroxypropionic acid) diammonium titanium hydroxide (TiBisLac , Molecular weight is 294.08), the solvent of polyethylenimine and polyacrylic acid is water.

[0034] Assembly conditions and methods:

[0035] (1) Polyethyleneimine is made into 500ml of a 0.5wt% solution with deionized water, and polyacrylic acid is made into 500ml of a 0.05wt% solution, and left to stand for degassing respectively;

[0036] (2) In order to charge the surface of the polyacrylonitrile support membrane, conventional hydrolysis modification technology is adopted. Firstly, when the temperature is 65°C, the polypropylene membrane ultrafiltration memb...

specific Embodiment 3

[0044] The base membrane is made of polyacrylonitrile (PAN) material, a flat ultrafiltration membrane with a molecular weight cut-off of 20,000 and a membrane area of ​​28cm 2 , the polycationic material used is polyethyleneimine (PEI, with a molecular weight of 60,000), the polyanion is polyacrylic acid (PAA, with a molecular weight of 4 million), di(2-hydroxypropionic acid) diammonium titanium hydroxide (TiBisLac , Molecular weight is 294.08), the solvent of polyethylenimine and polyacrylic acid is water.

[0045] Assembly conditions and methods:

[0046] (1) Polyethyleneimine is made into 500ml of a 0.5wt% solution with deionized water, and polyacrylic acid is made into 500ml of a 0.05wt% solution, and left to stand for degassing respectively;

[0047] (2) In order to charge the surface of the polyacrylonitrile support membrane, conventional hydrolysis modification technology is adopted. Firstly, when the temperature is 65°C, the polypropylene membrane ultrafiltration memb...

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Abstract

A method for in situ generating inorganic nano particles-polyelectrolyte hybrid membrane belongs to the technical field of membrane separation. The method comprises the steps as follows: polycations and polyanions are assembled on the surface of a basal membrane in a layer upon layer adsorption manner to form a polyelectrolyte multilayer membrane; and the titanic precursor is enabled to have an hydrolysis reaction with the polycations in situ to generate nanometer titanium dioxide particles, so that an inorganic nano particle polyelectrolyte hybrid membrane is formed, and the membrane is further induced by ultraviolet light to form a composite separation membrane with stronger hydrophilcity. According to the method, nano particles are generated in situ, so that generated nano titanium dioxide particles can be distributed on the surface of the multilayer membrane more uniformly, and then the problems of conglomeration of nano particles and controllable capacity in the hybrid membrane can be overcome effectively.

Description

technical field [0001] The invention relates to the preparation of a nano-hybrid membrane, in particular to the preparation of an in-situ-generated inorganic nano-particle polyelectrolyte hybrid membrane, which belongs to the technical field of membrane separation. Background technique [0002] Membrane separation technology is becoming one of the important supporting technologies in the fields of energy and environment because of its energy-saving and environment-friendly features. The development of high-performance membrane materials has always been the core issue of this technology. From the perspective of separation membrane materials, organic membranes have good flexibility, good film-forming performance, high selectivity, and many varieties, but their thermal stability, mechanical strength, and organic solvent resistance need to be further improved. Inorganic membranes have advantages in terms of thermal stability, chemical stability, and mechanical stability. Organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/00B01D67/00B01D69/12
Inventor 张国俊张蕾郭红霞纪树兰
Owner BEIJING UNIV OF TECH
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