Dry preservation method of ion exchange membrane

An ion-exchange membrane, dry state technology, applied in the field of membrane preparation, can solve the problems of inconvenient transportation, difficult assembly process, large occupied area, etc., and achieve the effects of good electrochemical performance, easy cutting, and low cost

Inactive Publication Date: 2012-06-27
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The storage process of membrane materials occupies a large area and is inconvenient to transport
In order to avoid dehydration and drying in the air, the ion exchange membrane is always required to be in a wet state during the equipment assembly process, which brings difficulties to the assembly process

Method used

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  • Dry preservation method of ion exchange membrane
  • Dry preservation method of ion exchange membrane
  • Dry preservation method of ion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 50g of pure glycerin to 50g of deionized water, stir and dissolve at room temperature, wait for the solution to be uniform and transparent, soak the commercially available PE01 ion exchange membrane in the solution for 2 hours, take it out from the solution and place it in the Dry naturally at room temperature.

Embodiment 2

[0018] Add 50g of pure glycerin to 50g of deionized water, stir and dissolve at room temperature, wait until the solution is uniform and transparent, soak the PVDF ion exchange membrane in the solution for 2 hours, take it out from the solution and put it under room temperature Let dry naturally.

Embodiment 3

[0020] Add 80g of pure glycerin to 20g of deionized water, stir and dissolve at room temperature, wait until the solution is uniform and transparent, soak the PVDF ion exchange membrane in the solution for 2 hours, take it out from the solution and put it under room temperature Let dry naturally.

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PUM

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Abstract

Belonging to the technical field of membrane preparation, in particular to the technical field of membrane preservation, the invention provides a dry preservation method of an ion exchange membrane. The method is characterized by comprising the following steps in order: preparing a treating solution for dry preservation of an ion exchange membrane, with the treating solution containing 50wt.%-96wt.% of glycerin and 4.5wt.%-50wt.% of deionized water; placing the ion exchange membrane in the treating solution and immersing it for at least two hours, then taking it out and conducting airing at room temperature. The method of the invention has the advantages of simplicity, convenience, as well as low cost, and has good dimension stability, and no obvious change in mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and in particular provides a method for dry-state preservation of ion-exchange membranes. Background technique [0002] The ion exchange membrane is a charged functional material with anion exchange groups or cation exchange groups. In aqueous solution, due to the dissociation of counter ions paired with fixed charges, the membrane material itself has a positive charge. Or negatively charged, counter ions can undergo migratory movement in the membrane. Combining with DC electric field, electrodialysis, continuous electrodeionization and other separation processes are formed to remove charged particles in aqueous solution, which can be applied to softened water preparation, elimination of heavy metal ion pollution, and recovery of waste acid and waste alkali. It is widely used in industrial water treatment, environmental protection, clean production and other fields. Especially in r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00
Inventor 王保国薛艳龙郭伟男刘宗煜青格乐图
Owner TSINGHUA UNIV
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