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Method for preparing magnetic field controlled cation exchange membrane

A cation exchange membrane and magnetic field technology, which is applied in the field of magnetic field controllable cation exchange membrane preparation, can solve the problems of limited application range, uncontrollable cation passing rate, singleness, etc.

Inactive Publication Date: 2018-05-04
桐乡佳车科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The cation exchange membranes prepared in the prior art generally have only a single effect of cation exchange, and their cation passing performance cannot be effectively controlled, and the cation passing rate cannot be regulated, thus limiting their application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] A method for preparing a magnetic field controllable cation exchange membrane, characterized in that: comprising the following steps:

[0029] 1) Preparation of copolymer

[0030] The two monomers containing sulfonic acid group-containing polymer units and hydroxyl-containing polymer units were distilled under reduced pressure to remove the polymerization inhibitor; the sulfonic acid group-containing polymer units, hydroxyl-containing polymer units and solvent deionized water were added to a three-necked flask to prepare copolymerization thing;

[0031] 2) Preparation of spinning solution

[0032] Add the copolymer into the solvent and mechanically stir to prepare a spinning solution, then add magnetic particles and emulsifiers in turn, and stir evenly to obtain a uniform spinning solution. The concentration of the prepared spinning solution is 30wt%; The flow rate is 1mL·h -1 , the distance between the nozzle and the receiver is 15cm;

[0033] 3) Preparation of cat...

Embodiment approach 2

[0041] A method for preparing a magnetic field controllable cation exchange membrane, comprising the steps of:

[0042] 1) Preparation of copolymer

[0043] The two monomers containing sulfonic acid group-containing polymer units and hydroxyl-containing polymer units were distilled under reduced pressure to remove the polymerization inhibitor; the sulfonic acid group-containing polymer units, hydroxyl-containing polymer units and solvent deionized water were added to a three-necked flask to prepare copolymerization thing;

[0044] 2) Preparation of spinning solution

[0045] Add the copolymer into the solvent and mechanically stir to prepare a spinning solution, then add magnetic particles and emulsifiers in turn, and stir evenly to obtain a uniform spinning solution. The concentration of the prepared spinning solution is 35wt%; the electrospinning parameter is that the voltage is 20kV, and the solution The flow rate is 2mL·h-1, and the distance between the nozzle and the re...

Embodiment approach 3

[0054] A method for preparing a magnetic field controllable cation exchange membrane, comprising the steps of:

[0055] 1) Preparation of copolymer

[0056] The two monomers containing sulfonic acid group-containing polymer units and hydroxyl-containing polymer units were distilled under reduced pressure to remove the polymerization inhibitor; the sulfonic acid group-containing polymer units, hydroxyl-containing polymer units and solvent deionized water were added to a three-necked flask to prepare copolymerization thing;

[0057] 2) Preparation of spinning solution

[0058] Add the copolymer into the solvent and mechanically stir to prepare a spinning solution, then add magnetic particles and emulsifiers in turn, and stir evenly to obtain a uniform spinning solution. The concentration of the prepared spinning solution is 32.5wt%; the electrospinning parameter is a voltage of 15kV, The solution flow rate is 1.5 mL h -1 , the distance between the nozzle and the receiver is 7...

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Abstract

The invention discloses a method for preparing a magnetic field controlled cation exchange membrane. According to the method, magnetic particles are added into the cation exchange membrane, and a cation exchange rate and an exchange form can be subjected to trace control by virtue of action of the magnetic particles. Moreover, due to the addition of the magnetic particles, the cation exchange membrane is controlled by an external electric signal, and a stress field generated by the magnetic particles generates direct guide and influence effects on aggregation and exchange of the cation. When alocal exchange rate needs to be improved in a certain area of the whole cation exchange membrane, a corresponding magnetic field needs to be applied to the area, arrangement and magnetic orientationof the magnetic particles in the exchange membrane can be influenced by the external magnetic field, a magnetic field area is formed in the exchange membrane, and the magnetic field area possibly influences positive electron distribution density on the cation exchange membrane, so that a through-rate of the cation inside and outside the membrane is changed, and then the cation exchange can be controlled.

Description

technical field [0001] The invention belongs to the technical field of particle exchange membrane preparation, and in particular relates to a method for preparing a magnetic field controllable cation exchange membrane. Background technique [0002] Ion exchange resins are a class of functional polymer materials that exhibit ion exchange functions. Classified according to the skeleton structure, ion exchange resins can be divided into two categories: gel-type resins and macroporous resins. The first type is to prepare a cross-linked network structure by free radical suspension polymerization of a mixed solution of styrene and divinylbenzene under the condition of the presence of an initiator (dibenzoyl peroxide, azodisisocarbamate). copolymerized polymer spheres. This polymeric sphere is a transparent, non-porous gel-type resin. The second type of macroporous ion exchange resin is a resin with a new structure developed on the basis of gel resin. The characteristic of this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0006B01D67/0079B01D69/02B01D2323/35B01D2323/50B01D2325/42
Inventor 沈利强
Owner 桐乡佳车科技股份有限公司
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