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Preparation method for composite film of chitosan/sulfonated polyethersulfone and polyethersulfone and application thereof

A technology of sulfonated polyethersulfone and polyethersulfone, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve good dehydration performance, abundant raw materials, and low price

Active Publication Date: 2011-07-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the method of improving the interface stability and greatly improving the performance has not been reported. Therefore, this study proposes a concept that can greatly improve the separation performance while improving the interface stability.

Method used

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  • Preparation method for composite film of chitosan/sulfonated polyethersulfone and polyethersulfone and application thereof
  • Preparation method for composite film of chitosan/sulfonated polyethersulfone and polyethersulfone and application thereof

Examples

Experimental program
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Embodiment 1

[0011] Weigh 2.5g of chitosan with a deacylation degree of 90.2%, put 2.5g of glacial acetic acid and 95g of aqueous solution into a three-necked flask, heat in a constant temperature water bath at 80°C, and stir at a speed of 500r / min for 1h. After the chitosan is completely dissolved, the temperature is lowered to 25° C., filtered through a copper mesh, and allowed to stand for 1 hour for defoaming to prepare a chitosan-acetic acid solution with a mass concentration of 2.5%. Weigh 10g of polyethersulfone, measure 100mL of chloroform solution into a three-necked flask, put the three-necked flask into an ice-water bath after it is completely dissolved, add 50mL of chloroform solution containing 6g of chlorosulfonic acid drop by drop with a dropping funnel, at 500r / / Min speed stirring for 1.5h, the prepared solution was poured into a large amount of deionized water and washed several times until the solution became neutral, and dried to obtain sulfonated polyethersulfone. Weigh...

Embodiment 2

[0013] Weigh 2.5g of chitosan with a deacylation degree of 90.2%, put 2.5g of glacial acetic acid and 95g of aqueous solution into a three-necked flask, heat in a constant temperature water bath at 80°C, and stir at a speed of 500r / min for 1h. After the chitosan is completely dissolved, it is lowered to 25° C., filtered, and allowed to stand for 1 hour for defoaming to prepare a chitosan-acetic acid solution with a mass concentration of 2.5%. Weigh 10g of polyethersulfone, measure 100mL of chloroform solution into a three-necked flask, put the three-necked flask into an ice-water bath after it is completely dissolved, add 50mL of chloroform solution containing 6g of chlorosulfonic acid drop by drop with a dropping funnel, at 500r / / Stir at a speed of min for 3 hours, pour the solution into a large amount of deionized water and wash it several times until the solution becomes neutral, and dry to obtain sulfonated polyethersulfone. Weigh 1.2g of sulfonated polyethersulfone, 1.8g ...

Embodiment 3

[0015] Weigh 2.5g of chitosan with a deacylation degree of 90.2%, put 2.5g of glacial acetic acid and 95g of aqueous solution into a three-necked flask, heat in a constant temperature water bath at 80°C, and stir at a speed of 500r / min for 1h. After the chitosan is completely dissolved, it is lowered to 25° C., filtered, and allowed to stand for 1 hour for defoaming to prepare a chitosan-acetic acid solution with a mass concentration of 2.5%. Weigh 10g of polyethersulfone, measure 100mL of chloroform solution into a three-necked flask, put the three-necked flask into an ice-water bath after it is completely dissolved, and add 50mL of chloroform solution containing 6g of chlorosulfonic acid drop by drop with a dropping funnel, at 500r / / Stir at a speed of min for 4.5 hours, pour the solution into a large amount of deionized water and wash it several times until the solution becomes neutral, and dry to obtain sulfonated polyethersulfone. Weigh 1.2g of sulfonated polyethersulfone,...

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Abstract

The invention discloses a preparation method for a composite film of chitosan / sulfonated polyethersulfone and polyethersulfone and an application thereof; the method comprises the following steps: preparing a chitosan acetic acid solution by dissolving chitosan acetic acid after deacetylation in a water solution; dissolving the polyethersulfone in a chloroform solution to prepare a polyethersulfone chloroform solution; dissolving chlorosulfonic acid in a chloroform solution to prepare into a solution, and dropwise adding the solution into the chlorosulfonic acid chloroform solution for sulfonation so as to obtain sulfonated polyethersulfone; mixing and dissolving the sulfonated polyethersulfone and the polyethersulfone in a dimethylformamide (DMF) solution to prepare a basement membrane solution, filtering, deaerating and shaving into a film to obtain a nonsymmetric basement membrane support layer in the water; and coating the chitosan solution on the basement membrane support layer to obtain the composite film through drying. The composite film has a good separating effect for separating alcohol and water. The preparation method has the advantages of simple preparation process, abundant raw materials, low cost and temperate conditions.

Description

technical field [0001] The invention relates to a preparation method and application of a chitosan / sulfonated polyethersulfone-polyethersulfone composite membrane. The invention belongs to the technical field of pervaporation membrane separation. Background technique [0002] The pervaporation membrane separation method has the advantages of green safety, low energy consumption, and easy operation. It is known as the "third-generation membrane technology" and one of the most promising high-tech technologies in the 21st century. At present, more than 100 sets of pervaporation devices have been established in the world, most of which are used for the dehydration of ethanol or isopropanol. The key part of membrane separation is the membrane. The membranes currently used for pervaporation of alcohol-water separation can be divided into two categories: homogeneous membranes and composite membranes. Homogeneous film is a kind of film formed by using common hydrophilic materials ...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/08B01D71/68B01D67/00
Inventor 吴洪李宪实姜忠义
Owner TIANJIN UNIV
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