Ion exchange membrane with monovalent ion selectivity and preparing method and application thereof

An ion-exchange membrane and ion-selective technology, which is applied in the field of ion-exchange membrane with monovalent ion selectivity and its preparation, can solve problems such as reducing the current efficiency of electrodialysis, affecting ion separation, increasing membrane surface resistance, etc., and achieving electrochemical The effect of controllable performance and controllable separation performance
CN106099147AInactive Publication Date: 2016-11-09QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Publication Date
2016-11-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an ion exchange membrane with the monovalent ion selectivity and a preparing method and application thereof. The ion exchange membrane with the monovalent ion selectivity comprises an ion exchange membrane body and a polyelectrolyte layer deposited on the surface of the ion exchange membrane body. The polyelectrolyte layer is composed by mixing conductive nanometer particles and polyelectrolyte. According to the ion exchange membrane with the monovalent ion selectivity and the preparing method and application thereof, a mixed polyelectrolyte solution is prepared by mixing the conductive nanometer particles and the polyelectrolyte, then the ion exchange membrane body is modified in a layer-by-layer self-assembly mode, and the ion exchange membrane with the monovalent ion selectivity is further prepared. The filming water absorption, the thickness, resistance and the separation selectivity of the ion exchange membrane with the monovalent ion selectivity can be controlled through the deposition layer number, the nanometer particle concentration and solution ion strength, the monovalent ion separation selectivity of the ion exchange membrane is further improved, and the quite-high practicability and broad application prospects are achieved.
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Description

technical field

[0001] The invention belongs to the technical field of ion-exchange membranes, and relates to an ion-exchange membrane and its preparation method and application, in particular to an ion-exchange membrane with monovalent ion selectivity, its preparation method and application. Background technique

[0002] The electrodialysis process is a loading process of the ion exchange membrane. Under the driving force of the potential difference, the desalination chamber and the concentration chamber obtain fresh water and concentrated water respectively by means of directional migration of ions and the selectivity of ion exchange membranes for anions and cations. The electrodialysis process does not need to overcome the osmotic pressure, so compared with nanofiltration and reverse osmosis, a higher water recovery rate can be obtained; at the same time, the membrane fouling problem in the above-mentioned ion exchange membrane process can also be reduced or avoided by th...

Claims

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