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Preparation method and application of full-interpenetrating membrane based on quaternized polyvinyl alcohols

A technology of polyvinyl alcohol and polyvinyl alcohol, which is applied in the preparation of fully interpenetrating membranes based on quaternized polyvinyl alcohols, the application field of competitive adsorption of rhodamine and Congo red, and can solve the problem of poor film stability and compatibility, etc. problem, achieve the effect of reducing swelling degree and improving stability

Active Publication Date: 2015-12-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a kind of preparation method based on quaternized polyvinyl alcohol fully interpenetrating membrane, G 8-2-8 Doped with acrylamide monomer in the quaternized polyvinyl alcohol casting solution, using in-situ polymerization technology to initiate polymerization to form a block polymer, and then under the action of a cross-linking agent, cross-link to form a fully interpenetrating An anion exchange membrane with a network structure, the prepared anion membrane material has high adsorption capacity and good swelling performance, can be used as an adsorbent in sewage treatment, and solves the problem of poor membrane stability and compatibility in the prior art

Method used

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  • Preparation method and application of full-interpenetrating membrane based on quaternized polyvinyl alcohols

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Effect test

Embodiment 1

[0018] The steps of the method for preparing the quaternized polyvinyl alcohol fully interpenetrating membrane are as follows.

[0019] (1) Preparation of quaternized polyvinyl alcohol. At room temperature, slowly add 0.908 g of polyvinyl alcohol (PVA) into the flask and start stirring, and heat in a water bath. The temperature of the water bath is gradually raised to about 90°C to completely dissolve the PVA; the completely dissolved PVA is cooled to room temperature, and 4.708g of epoxypropyltrimethylammonium chloride (EPTMAC) is added to the flask, and stirred to make it The reactants are in full contact; every 10s, slowly add potassium hydroxide solution with a concentration of 10% into the round bottom flask, drop 4-5 drops each time, and the total amount of potassium hydroxide solution is 1-2mL; after the reaction, The product was cooled to room temperature, poured into a pre-prepared beaker containing 20 mL of isopropanol solution, and stirred continuously with a glass...

Embodiment 2

[0022] The steps of the method for preparing the quaternized polyvinyl alcohol fully interpenetrating membrane are as follows.

[0023] (1) Preparation of quaternized polyvinyl alcohol. At room temperature, slowly add 0.908 g of polyvinyl alcohol (PVA) into the flask and start stirring, and heat in a water bath. The temperature of the water bath is gradually raised to about 90°C to completely dissolve the PVA; the completely dissolved PVA is cooled to room temperature, and 4.708g of epoxypropyltrimethylammonium chloride (EPTMAC) is added to the flask, and stirred to make it The reactants are in full contact; every 10s, slowly add potassium hydroxide solution with a concentration of 10% into the round bottom flask, drop 4-5 drops each time, and the total amount of potassium hydroxide solution is 1-2mL; after the reaction, The product was cooled to room temperature, poured into a pre-prepared beaker containing 20 mL of isopropanol solution, and stirred continuously with a glass...

Embodiment 3

[0026] The steps of the method for preparing the quaternized polyvinyl alcohol fully interpenetrating membrane are as follows.

[0027] (1) Preparation of quaternized polyvinyl alcohol. At room temperature, slowly add 0.908 g of polyvinyl alcohol (PVA) into the flask and start stirring, and heat in a water bath. The temperature of the water bath is gradually raised to about 90°C to completely dissolve the PVA; the completely dissolved PVA is cooled to room temperature, and 4.708g of epoxypropyltrimethylammonium chloride (EPTMAC) is added to the flask, and stirred to make it The reactants are in full contact; every 10s, slowly add potassium hydroxide solution with a concentration of 10% into the round bottom flask, drop 4-5 drops each time, and the total amount of potassium hydroxide solution is 1-2mL; after the reaction, The product was cooled to room temperature, poured into a pre-prepared beaker containing 20 mL of isopropanol solution, and stirred continuously with a glass...

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Abstract

The invention relates to a preparation method of a full-interpenetrating membrane based on quaternized polyvinyl alcohols. Quaternized polyvinyl alcohol is dissolved in deionized water, and a Gemini surfactant and an acrylamide monomer are hydrolyzed with deionized water and then added to a quaternized polyvinyl alcohol solution; potassium persulfate is added, the mixture has a backflow reaction at the temperature of 70 DEG C-90 DEG C, and then ultrasonic treatment is performed; glutaraldehyde is added, the mixture is mechanically stirred, ultrasonic treatment is performed, the solution is poured on a horizontal glass plate, a solvent is evaporated, and an anion exchange membrane is formed. The surfactant with positive charge is introduced to the composite membrane, and the adsorption activity site of the membrane surface is improved conveniently, so that the adsorbing capacity of the composite membrane is improved. The formed full-interpenetrating structure facilitates reduction of the swelling degree of the membrane structure and improves the stability of the membrane in the wastewater treatment process.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to anion exchange membrane adsorption technology, in particular to a preparation method based on quaternized polyvinyl alcohol fully interpenetrating membrane and its application in competitive adsorption of rhodamine and Congo red. Background technique [0002] At present, many industries, such as papermaking, cosmetics, paint pigments, plastics, leather and textile industries, will produce a large amount of colored wastewater in the production process. Such sewage contains a large amount of organic pollutants, which will inhibit the penetration of sunlight into the deep area below the water surface, and reduce the photosynthetic activity of aquatic plants. At the same time, the characteristics of the molecular structure of the dye make it have certain carcinogenic and teratogenic effects, and are discharged into the environment. poses a great threat to the health of humans and other l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCY02W10/37
Inventor 王璐璐张扬王吉林
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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