Preparation method and application of homogeneous cation exchange membrane containing alkylbenzene sulfonate

A technology of cation exchange membrane and alkylbenzene sulfonate, which is applied in the field of exchange membrane to achieve the effect of excellent performance, mature membrane forming technology, environmental protection, and easy industrial implementation

Pending Publication Date: 2021-10-22
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a preparation method and application of a homogeneous cation-exchange membrane containing alkylbenzenesulfonate, a low-cost and environmentally friendly homogeneous cation-exchange membrane to solve the problem of brackish water Reduce the problem of high cost of desalination application ED process, the prepared membrane has low resistance, good desalination performance and long-term stable use

Method used

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  • Preparation method and application of homogeneous cation exchange membrane containing alkylbenzene sulfonate
  • Preparation method and application of homogeneous cation exchange membrane containing alkylbenzene sulfonate
  • Preparation method and application of homogeneous cation exchange membrane containing alkylbenzene sulfonate

Examples

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Embodiment 1

[0049]Mix 10g of polysulfone, 10g of PVP K60 and 70g of chloroform, and stir at 60°C for 10 hours. After it is completely dissolved, add 10g of sodium lignosulfonate and fully dissolve at 50°C to form a homogeneous solution. Ultrasonic defoaming at 80°C for 4 hours in the instrument, standing for defoaming for 24 hours, scraping the casting solution on a dry, smooth and clean glass plate, putting it in an oven, and gradually increasing the temperature: evaporate the solvent at 50°C for 5 hours, then heat up to 90°C to evaporate the solvent After 5 hours, the temperature was raised to 120°C to evaporate the solvent for 3 hours, and then it was taken out from the oven and cooled, then immersed in deionized water, and the ion-exchange membrane automatically fell off from the glass plate, which was the ion-exchange membrane of the present invention. After testing, the cationic membrane has a thickness of 183um, a water absorption rate of 32%, and an ion exchange capacity of 1.06mmo...

Embodiment 2

[0051] Mix 10g of polyethersulfone 2010, 8g of acetone and 100g of chloroform, and stir at 60°C for 10 hours. After it is completely dissolved, add 15g of sodium dodecylbenzenesulfonate, and fully dissolve at 60°C to form a homogeneous phase. After solution, ultrasonic degassing in an ultrasonic instrument at 60°C for 4 hours, standing still for degassing for 24 hours, scraping the casting solution on a dry, smooth and clean glass plate, putting it in an oven, and gradually increasing the temperature: evaporating the solvent at 50°C for 5 hours, then heating up Evaporate the solvent at 80°C for 4 hours, heat up to 130°C and evaporate the solvent for 4 hours, then take it out from the oven and cool it, then immerse it in deionized water, the ion-exchange membrane will automatically fall off from the glass plate, which is the ion-exchange membrane of the present invention. After testing, the cationic membrane has a thickness of 201um, a water absorption rate of 33%, and an ion ex...

Embodiment 3

[0053] Mix 15g of polyethersulfone 3010, 12g of PVP K120 and 90g of dimethylacetamide, stir at 50°C for 4 hours, after it is completely dissolved, add 12g of sodium octadecyl p-xylene sulfonate and fully dissolve at 70°C After the homogeneous solution is completely formed, ultrasonic defoaming in an ultrasonic instrument at 80°C for 5 hours, standing still for 24 hours, scraping the casting solution on a dry, smooth and clean glass plate, putting it in an oven, gradient heating: evaporation at 60°C Solvent for 5 hours, heat up to 90°C to evaporate the solvent for 5 hours, heat up to 120°C to evaporate the solvent for 3 hours, then take it out of the oven and cool it, then immerse it in deionized water, the ion-exchange membrane will automatically fall off from the glass plate, which is the ion-exchange membrane of the present invention . After testing, the thickness of the cationic membrane is 163um, the water absorption rate is 30%, and the ion exchange capacity is 0.96mmol / g...

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Abstract

The invention discloses a preparation method of a homogeneous cation exchange membrane containing alkylbenzene sulfonate, and the preparation method comprises the following steps: preparing a membrane casting solution, evaporating a solvent to prepare a membrane, and post-treating, the invention also provides the homogeneous cation exchange membrane prepared by the preparation method, and the invention also provides an application of the homogeneous cation exchange membrane prepared by the preparation method. The invention relates to the field of electrodialysis concentration, belongs to the field of exchange membranes, and particularly provides a preparation method and application of a homogeneous cation exchange membrane containing alkylbenzene sulfonate, the homogeneous cation exchange membrane which is low in cost and environmentally friendly is prepared, and the problem that the ED process applied to brackish water desalination is high in cost is solved. The prepared membrane is low in resistance, good in desalting performance and capable of being stably used for a long time.

Description

technical field [0001] The invention belongs to the technical field of exchange membranes, and specifically refers to a preparation method and application of a homogeneous cation exchange membrane containing alkylbenzene sulfonate. Background technique [0002] As a key ion membrane, cation exchange membrane has been widely used in electrodialysis, water treatment, fuel cell and other fields. In some remote water-scarce areas, brackish water is the only available water source nearby, so the desalination process of brackish water has also become a research hotspot in the field of desalination in recent years. According to the salt content in the water, water containing total dissolved solids (TDS) of 1000mg / L to 10000mg / L is usually called brackish water, wherein TDS less than 5000mg / L is low-moderate brackish water, above 5000mg / L For highly brackish water. Brackish water cannot be used directly due to its high salt content. According to the requirements of the World Healt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D61/44B01D69/02C02F1/469
CPCB01D67/0011B01D67/0009B01D69/02B01D61/44C02F1/4695B01D2325/42Y02A20/124
Inventor 王建友赵津礼
Owner NANKAI UNIV
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