A kind of assembly method of organic/inorganic hollow fiber composite membrane

A technology of inorganic hollow fiber and assembly method, which is applied in the field of membrane separation and can solve problems such as difficulties

Inactive Publication Date: 2011-12-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for hollow fiber ceramic membranes, how to form a stable and dense separation layer on its surface is more difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The inorganic porous membrane is zirconia (ZrO 2 ) material in the form of a hollow fiber ultrafiltration membrane with a membrane pore size of 50nm and a membrane area of ​​50cm 2 , the silane coupling agent used for pretreatment is 3-amino-triethoxysilane, the polycation is polyethyleneimine (PEI, the molecular weight is 60,000), and the polyanion used is polyacrylic acid (PAA, the molecular weight is 4 million ), polyethyleneimine and polyacrylic acid were dissolved in deionized water respectively, the crosslinking temperature was 180°C, and the crosslinking time was 1h.

[0021] Assembly conditions and methods:

[0022] (1) Polyethyleneimine is made into 500ml of 0.25wt% solution with deionized water; Polyacrylic acid is made into 500ml of 0.05wt% solution with deionized water, and 3-amino-triethoxysilane is made into with ethanol 500ml of 1.00wt% solution;

[0023] (2) In order to adsorb polyacrylic acid on the surface of the inorganic membrane, the inorganic ul...

Embodiment 2

[0034] Aluminum oxide (Al 2 o 3 ) material in the form of a hollow fiber ultrafiltration membrane with a membrane pore size of 50nm and a membrane area of ​​50cm 2 , the silane coupling agent used for pretreatment is 3-amino-triethoxysilane, the polycation is polyethyleneimine (PEI, the molecular weight is 60,000), and the polyanion used is polyacrylic acid (PAA, the molecular weight is 4 million ), polyethyleneimine and polyacrylic acid were dissolved in deionized water respectively, the crosslinking temperature was 250°C, and the crosslinking time was 1h.

[0035] Assembly conditions and methods:

[0036] (1) Polyethyleneimine is made into 500ml of 0.25wt% solution with deionized water; Polyacrylic acid is made into 500ml of 0.05wt% solution with deionized water, and 3-amino-triethoxysilane is made into with ethanol 500ml of 1.00wt% solution;

[0037] (2) In order to adsorb polyacrylic acid on the surface of the inorganic membrane, the inorganic ultrafiltration membrane ...

Embodiment 3

[0048] The inorganic porous membrane is silicon oxide (SiO 2 ) material in the form of a hollow fiber ultrafiltration membrane with a membrane pore size of 50nm and a membrane area of ​​50cm 2 , the silane coupling agent used for pretreatment is 3-amino-triethoxysilane, the polycation is polyethyleneimine (PEI, the molecular weight is 60,000), and the polyanion used is polyacrylic acid (PAA, the molecular weight is 4 million ), polyethyleneimine and polyacrylic acid were dissolved in deionized water respectively, the crosslinking temperature was 180°C, and the crosslinking time was 2h.

[0049] Assembly conditions and methods:

[0050] (1) Polyethyleneimine is made into 500ml of 0.25wt% solution with deionized water; Polyacrylic acid is made into 500ml of 0.05wt% solution with deionized water, and 3-amino-triethoxysilane is made into with ethanol 500ml of 1.00wt% solution;

[0051] (2) In order to adsorb polyacrylic acid on the surface of the inorganic membrane, the inorgan...

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Abstract

The invention relates to an assembly method of an organic / inorganic hollow fiber composite membrane, which belongs to the technical field of membrane separation. The steps include: immersing the hollow fiber ceramic porous membrane in a silane coupling agent for pretreatment for 0.1 to 4 hours, rinsing and drying; Alternately and dynamically filter the polycation solution or polyanion solution on the surface of the ceramic porous membrane to form a thin film separation layer; put the composite membrane in a vacuum drying oven at 100-300°C for 0.1-4 hours to thermally crosslink the polycation and polyanion layers A chemical reaction occurs between them to form a covalently cross-linked separation layer. When the polycation and polyanion solution is filtered on the base membrane, the transmembrane pressure difference is -0.02~-0.09MPa. The invention is easy to operate, can prepare a pervaporation separation membrane with excellent performance, and effectively improves the permeation flux, mechanical strength, thermal stability and chemical stability of the composite membrane.

Description

technical field [0001] The invention relates to an assembly method of an organic / inorganic hollow fiber composite membrane, belonging to the technical field of membrane separation. Background technique [0002] In recent years, organic polymer membranes have been widely used due to their good separation performance and low price. Among them, polyelectrolytes are a class of membrane materials with a wide range of uses, and can be widely used in separation membranes, biosensors, surface modification, medicine and other fields. The layer-by-layer self-assembly method is an effective method to prepare polyelectrolyte composite membranes, which utilizes the electrostatic adsorption of polycations and polyanions to achieve flexible assembly of multilayer membranes. Currently, this method has been widely used in the assembly of organic porous membrane substrates. [0003] A preparation method of a single-endothelial hollow fiber pervaporation membrane proposed by us earlier (Chin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/12B01D69/08B01D67/00
Inventor 张国俊王乃鑫王路纪树兰
Owner BEIJING UNIV OF TECH
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