Method for preparation of cation membrane for diffusion dialysis with mesoporous silica

A technology of mesoporous silica and diffusion dialysis, which is applied in the field of hybrid cationic membranes for diffusion dialysis, can solve the problem of further improvement of hydroxide radical flux, achieve improved alkali recovery efficiency, simple method, and improved compatibility Effect

Active Publication Date: 2016-08-10
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results of recovery of NaOH by diffusion dialysis show that the composite membrane has a good separation effect, but the flux of hydroxide needs to be further improved
[0006] Through the investigation and research of literature, it is found that mesoporous silica is widely used, and mesoporous silica is used as inorganic filling material to prepare organic-inorganic hybrid membranes for gas separation, fuel cells, etc., but mesoporous silica As a filling material, the hybrid membrane was prepared and applied to the recovery of waste alkali by diffusion dialysis, basically no

Method used

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  • Method for preparation of cation membrane for diffusion dialysis with mesoporous silica
  • Method for preparation of cation membrane for diffusion dialysis with mesoporous silica
  • Method for preparation of cation membrane for diffusion dialysis with mesoporous silica

Examples

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Effect test

Embodiment 1

[0031] 1. Preparation of mesoporous silica

[0032] Add 120mL of 2mol / L hydrochloric acid solution and 4g of triblock copolymer P123 into the three-necked flask, set the temperature to 40°C, stir until P123 is completely dissolved, then add 10mL of tetraethyl orthosilicate (TEOS) at 40°C Pre-hydrolyze for 1.5h, then add 1mL KH550, stir and react at 40°C for 20h to obtain a suspension; place the resulting suspension at 100°C for 24h, filter with suction to obtain a white solid, dry and extract by Soxhlet (150ml (without Water and ethanol): 1.5mL concentrated hydrochloric acid: 1g (powder), time 48h, temperature 85°C) to obtain amino-modified mesoporous silica.

[0033]2. Preparation of cationic membrane for diffusion dialysis

[0034] (1) Weigh the mesoporous silica and sulfonated polyphenylene oxide prepared in step 1 according to the mass ratio of sulfonated polyphenylene ether to mesoporous silica at a ratio of 1:0.02; add mesoporous silica to DMF, and ultrasonically Dispe...

Embodiment 2

[0043] In this example, mesoporous silica and a cationic membrane for diffusion dialysis were prepared under the same conditions as in Example 1, and the same performance test was performed on them, the difference being the mass ratio of sulfonated polyphenylene ether to mesoporous silica in this example 1:0.04.

[0044] After testing, the performance parameters of the cationic membrane for diffusion dialysis obtained in this embodiment are: the water content of the membrane (W R ) is 193.66%, the ion exchange capacity is 0.20mmol / g, OH - Dialysis coefficient U OH It is 0.009m / h, and the separation coefficient is 31.0.

Embodiment 3

[0046] In this example, mesoporous silica and a cationic membrane for diffusion dialysis were prepared under the same conditions as in Example 1, and the same performance test was performed on them, the difference being the mass ratio of sulfonated polyphenylene ether to mesoporous silica in this example It is 1:0.06.

[0047] After testing, the performance parameters of the cationic membrane for diffusion dialysis obtained in this embodiment are: the water content of the membrane (W R ) is 160%, the ion exchange capacity is 0.20mmol / g, OH - Dialysis coefficient U OH It is 0.012m / h, and the separation coefficient is 40.4.

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Abstract

The invention discloses a method for preparation of a cation membrane for diffusion dialysis with mesoporous silica. Mesoporous silica is prepared by a template method, and then the cation membrane special for diffusion dialysis is prepared from mesoporous silica by direct blending. The obtained cation membrane comprises a hydrophobic polymer area, a fixed ion-containing active area and a gap area. The mesoporous silica prepared by the method provided by the invention contains a lot of exchange groups, can improve the ion flux of the membrane and ensure the separation effect, and at the same time can improve the mechanical properties and thermodynamic properties of traditional polymers. The cation membrane for diffusion dialysis prepared by the invention has a water content (WR) of 136.4%-193.7%, an ion exchange capacity of 0.1-0.3mmol / g, an OH<-> dialysis coefficient UOH of 0.008-0.025mol / h, and a separation coefficient of 11.5-40.

Description

1. Technical field [0001] The invention relates to a method for preparing a cationic membrane, in particular to a method for preparing a cationic membrane for diffusion dialysis by using mesoporous silicon oxide, and belongs to the technical field of a hybrid cationic membrane for diffusion dialysis. 2. Background technology [0002] Direct blending technology is the simplest method to prepare organic-inorganic hybrid materials. Its advantages are simple operation, low operating temperature, no damage to the organic phase, and it is suitable for nanoparticles in various forms. The ratio of inorganic substances can be adjusted according to the needs to obtain hybrid membranes with various properties and functions, which is a widely used method for preparing organic-inorganic hybrid membranes. The traditional blending method is to directly add inorganic particles into the organic solution, and make them uniformly dispersed in the organic matter by mechanical force. The disadv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L71/12C08K9/06C08K7/26B01D61/24B01D67/00C01B33/12
CPCB01D61/243B01D67/0079C01B33/124C08J5/2256C08J2371/12C08K7/26C08K9/06C08L71/12
Inventor 钱家盛李雪云苗继斌夏茹杨斌陈鹏曹明苏丽芬郑争志
Owner ANHUI UNIVERSITY
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