Hybridization hydrogel flat membrane for water filtration and preparation method thereof

A flat membrane and hydrogel technology, applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, membrane technology, etc., can solve grafting unevenness, a large amount of organic waste liquid, and hydrophilic grafting modification steps Complicated problems, to achieve the effect of simple process, low cost and good application prospects

Inactive Publication Date: 2013-06-26
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the technical problems to be solved by the present invention are that the surface of the membrane is easily polluted, the modification steps of hydrophilic grafting are complicated and the grafting is not uniform, and a large amount of organic waste liquid is generated during the preparation process of common membranes.
[0011] The technical scheme of the present invention to solve the problems such as easy contamination of the membrane surface, complex hydrophilic grafting modification steps and uneven grafting, and a large amount of organic waste liquid generated in the common membrane preparation process is to design a hybrid hydraulic gel for water filtration. Glue sheet film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. A polydiacetone acrylamide / calcium alginate hybrid hydrogel flat membrane for water filtration and its preparation method

[0024] a) Take by weighing 5g diacetone acrylamide, 0.5g sodium alginate, ethylene glycol dimethacrylate with a mass percentage of 0.15% of diacetone acrylamide, and polyvinylpyrrolidone with a mass percentage of diacetone acrylamide of 1%, and dissolve them together In 50ml of deionized water, stir and dissolve evenly, then add nano-silica with a mass percentage of 1% diacetone acrylamide, and ultrasonically disperse evenly to obtain a casting solution, which is placed in a closed container at 4°C for later use;

[0025] b) preparing an aqueous solution of calcium chloride with a mass percentage of calcium ions of 0.01%, as an ion crosslinking agent;

[0026] c) Add 5% ammonium persulfate of diacetone acrylamide mass percentage, 5% sodium bisulfite of diacetone acrylamide mass percentage and 0.01% tetramethylethylenediamine of diacet...

Embodiment 2

[0028] Example 2. A polyisopropylacrylamide / barium alginate hybrid hydrogel flat membrane for water filtration and its preparation method

[0029] a) Weigh 10g of isopropylacrylamide, 1g of sodium alginate, methylol melamine ether of 0.15% by mass of isopropylacrylamide, polyethylene glycol of 100% by mass of isopropylacrylamide, and dissolve them together in 100ml of deionized water, stir and dissolve evenly, then add nano-titanium dioxide with a mass percentage of 100% isopropylacrylamide, ultrasonically disperse evenly to obtain a casting solution, and place it in a closed container at 30°C for later use;

[0030] b) preparing an aqueous barium chloride solution with a mass percentage of barium ions of 2%, as an ion crosslinking agent;

[0031] c) Add 2% ammonium persulfate by mass percentage of isopropylacrylamide, 2% sodium bisulfite by mass percentage of isopropylacrylamide and 0.08% tetramethyl isopropylacrylamide by mass in the casting solution Ethylenediamine, after ...

Embodiment 3

[0033] Example 3. A polyacrylamide / zinc alginate hybrid hydrogel flat membrane for water filtration and its preparation method

[0034] a) Weigh 15g of acrylamide, 2g of sodium alginate, N,N'-methylenebisacrylamide with a mass percentage of 0.15% of acrylamide, and polyvinyl alcohol with a mass percentage of acrylamide of 2%, and dissolve them in 100ml of deionized water , stirring and dissolving evenly, then adding nanoclay with a mass percentage of 30% acrylamide, ultrasonically dispersing evenly to obtain a casting solution, and placing it in a closed container at 10°C for later use;

[0035] b) preparing an aqueous solution of zinc chloride with a mass percentage of zinc ions of 10%, as an ion crosslinking agent;

[0036] c) Add ammonium persulfate of 0.5% by mass of acrylamide, sodium bisulfite of 0.5% by mass of acrylamide and tetramethylethylenediamine of 0.2% by mass of acrylamide to the casting solution, stir and disperse evenly, Immediately pour the solution onto a ...

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Abstract

The invention discloses a hybridization hydrogel flat membrane for water filtration and a preparation method thereof. Irreversible deposition of macromolecules, colloids, electrolytes and the like is easy to occur on the surface of the membrane or inside the membrane because of hydrophobicity of a membrane filtration material, and thus causes membrane pollution, resulting in that the membrane flux is reduced continuously and the membrane separation process can not be normally implemented. The invention discloses the hybridization hydrogel flat membrane for water filtration. The flat membrane takes sodium alga acid as a macromolecule skeleton, acrylamide and a ramification of the acrylamide as a polymerization monomer to be added with a chemical crosslinking agent and an ionic crosslinked agent, and a water-solubility compound as a pore-foaming agent, and then a high-strength high-tenacity double cross-linked network hydrogel is formed in a polymerization manner, the pore-foaming agent is eluted so as to obtain the flat membrane which is used for water filtration, and the hybridization hydrogel flat membrane high hydrophily and good anti-fouling performance. The preparation method provided by the invention has the advantages that the process is simple, the cost is low, a waste solvent is not generated, and the obtained hydrogel flat membrane has good application prospect in easily-polluted membrane separation fields such as oil-water separation, protein separation and microorganism filtration.

Description

technical field [0001] The invention relates to a hybrid hydrogel flat membrane for water filtration and a preparation method thereof, belonging to the fields of functional materials, environmental materials and membranes. Background technique [0002] Due to its own hydrophobicity, membrane filtration materials can easily cause irreversible deposition of macromolecules, colloids, electrolytes and particles on the membrane surface or in the membrane, and the resulting membrane fouling will cause the flux of the membrane to decrease continuously, so that the membrane separation process cannot be normal. conduct. In view of the fact that the surface of the polymer membrane is easy to adsorb hydrophobic substances such as proteins, an effective way to reduce membrane fouling is to improve the surface properties of the membrane, such as charging the membrane surface or hydrophilizing the hydrophobic membrane. [0003] Blending modification is a simple method to improve membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/06B01D71/40B01D67/00C02F1/44C08F220/54C08F220/56C08F220/58C08F2/44C08J9/28
Inventor 赵孔银崔文葵魏俊富任彤张光辉
Owner TIANJIN POLYTECHNIC UNIV
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