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Ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and preparation method thereof

An ion exchange resin and carbon electrode technology, which is applied in the field of fresh water treatment technology, can solve the problems of redox current reducing electrode adsorption capacity, poor mechanical properties, and insufficient hydrophilicity.

Active Publication Date: 2013-08-14
CHUTIAN HUATONG PHARM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation method does not fully improve the hydrophilicity, and the prepared carbon electrode is prone to redox current, which reduces the adsorption capacity of the electrode and has poor mechanical properties.

Method used

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  • Ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and preparation method thereof
  • Ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and preparation method thereof
  • Ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1: Pretreatment of activated carbon powder, graphite powder, and cation exchange resin powder: Soak activated carbon powder and graphite powder in distilled water for 24 hours, then heat and dry at 120°C for 24 hours. The pretreatment steps of the ion exchange resin powder are: soak the washed cation resin powder in 2% NaOH solution which is about twice the volume of the resin for 4 hours, then drain it, and then wash it with water until the discharge liquid is close to neutral. Add 5% HCl twice the volume of the resin and soak for 4 hours to drain it, then wash it with clean water to be close to neutral.

[0050] Two: Mix 40g of graphite powder and 4g of PVDF to obtain a mixture, dissolve the mixture in 52ml N, N dimethylacetamide to obtain a slurry, then stir at a speed of 300rd / min for 12h, and coat the stirred slurry on a plexiglass plate , 60 ℃ drying, 70 ℃ vacuum firing made graphite conductive layer.

[0051] Three: Mix 40g of activated carbon powder, 4g of PVD...

Embodiment 2

[0053] One: Activated carbon powder, graphite powder, and cation exchange resin powder are pretreated: soak activated carbon powder and graphite powder in distilled water for 24 hours, then heat and dry at 120°C for 24 hours. The pretreatment steps of the ion exchange resin powder are: soak the washed cation resin powder in 2% NaOH solution about twice the volume of the resin for 4 hours, then drain it, and then wash it with water until the discharge liquid is close to neutral. Add 5% HCl twice the volume of the resin and soak for 4 hours to drain it, then wash it with clean water to be close to neutral.

[0054] Two: Mix 40g of graphite powder and 16g of PVDF to obtain a mixture, dissolve the mixture in 52ml N, N dimethylacetamide to obtain a slurry, then stir at a speed of 400rd / min for 15h, and coat the stirred slurry on a plexiglass plate , Dry at 60°C, and vacuum burn at 70°C to form a graphite conductive layer.

[0055] Three: Mix 40g of activated carbon powder, 16g of...

Embodiment 3

[0057] One: Activated carbon powder, graphite powder, and cation exchange resin powder are pretreated: soak activated carbon powder and graphite powder in distilled water for 24 hours, then heat and dry at 120°C for 24 hours. The pretreatment steps of the ion exchange resin powder are: soak the washed cation resin powder in 2% NaOH solution about twice the volume of the resin for 4 hours, then drain it, and then wash it with water until the discharge liquid is close to neutral. Add 5% HCl twice the volume of the resin and soak for 4 hours to drain it, then wash it with clean water to be close to neutral.

[0058] Two: Mix 40g of graphite powder and 8g of PVDF to obtain a mixture, dissolve the mixture in 52ml of N, N dimethylacetamide to obtain a slurry, then stir at a speed of 300rd / min for 15h, and coat the stirred slurry on organic glass The board was dried at 60°C and vacuum fired at 70°C to form a graphite conductive layer.

[0059] Three: Mix 40g of activated carbon pow...

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Abstract

The invention relates to an ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and a preparation method thereof. The ion exchange resin modified PVDF charcoal electrode is used for a fresh water treatment technology, and is prepared from activated charcoal powder, graphite powder, PVDF, ion exchange resin powder, organic solvent and the like. The prepared ion exchange resin modified PVDF charcoal electrode can adsorb ions in water by means of applied voltage, thereby efficiently removing salt in water; and the electrode has sufficient mechanical strength for bearingthe shearing force of water flow and favorable reversibility, thereby having a wide application range of raw water quality. The PVDF used as a binder can bind the activated charcoal powder and the graphite, the doping of the ion exchange resin powder can increase -SO3H and -OH on the electrode, and both the -SO3H and -OH are hydrophilic functional groups. The preparation process provided by the invention is simple and low in energy consumption, produces no byproduct, has no secondary pollution, and is low in treatment cost. The ion exchange resin modified PVDF charcoal electrode can perform electro-adsorption salt removal under normal temperature and normal pressure, and the salt removal rate is up to 90%. Thus, the invention can be used in the electro-adsorption water treatment field.

Description

technical field [0001] The invention relates to an ion exchange resin modified PVDF carbon electrode, and also discloses a preparation method of the ion exchange resin modified PVDF carbon electrode, which is used in fresh water treatment technology and belongs to the technical field of electric adsorption water treatment. Background technique [0002] With the development of the economy and the expansion of the population, the fresh water resources required by industry and life are increasingly scarce, and the purification of water resources has become a worldwide concern. The desalination processes used in China mainly include chemical desalination (ion exchange method), membrane separation technology desalination (electrodialysis and reverse osmosis method) and thermal desalination (distillation method). At present, the main method for removing anions and cations (including heavy metals and radioactive isotopes) in water is ion exchange. However, this method requires a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469
Inventor 张瑛洁郭佳马庆华
Owner CHUTIAN HUATONG PHARM EQUIP CO LTD
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