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Preparation method for high-strength hydrogel filtering membrane

A technology of hydrogel and filtration membrane, which is applied in the field of preparation of high-strength hydrogel filtration membrane and can solve the problems of low mechanical strength

Active Publication Date: 2015-06-17
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for preparing a hydrogel separation membrane, through the mutual entanglement and interpenetration of two hydrogel networks, and further adding a reinforcing agent in the membrane to solve the problem of low mechanical strength of the traditional hydrogel membrane the puzzle

Method used

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  • Preparation method for high-strength hydrogel filtering membrane
  • Preparation method for high-strength hydrogel filtering membrane
  • Preparation method for high-strength hydrogel filtering membrane

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preparation example Construction

[0024] A method for preparing a high-strength hydrogel filtration membrane, the specific implementation method is:

[0025] (1) Mix and dissolve the first monomer and the photoinitiator in deionized water to obtain the first monomer solution. The first monomer is one of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), sodium p-styrenesulfonate (NaSS), and β-hydroxyethyl methacrylate (HEMA), with a concentration of 10~ 200 grams per liter (g / L); the photoinitiator is α-ketoglutaric acid (α-KG), 2-hydroxy-2-methyl-1-phenyl-propan-1-one (Darocur 1173), 2 -One of hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure2959), the concentration is 1~20g / L;

[0026] (2) Mixing and dissolving the second monomer, photoinitiator, and crosslinking agent in deionized water to obtain a second monomer solution. The second monomer is one of acrylamide (AAm), acrylic acid (AAc), and isopropylacrylamide (NIPAAm), with a concentration of 10-200g / L; the photoinitiator is α-KG, Darocur 117...

Embodiment 1

[0038] (1) According to the concentration requirements in Table 1, mix and dissolve AMPS and α-KG in deionized water to obtain an AMPS solution, wherein the concentration of α-KG is 1g / L; (2) mix AAm, α-KG according to the concentration requirements of the corresponding numbers -KG and MBAA are mixed and dissolved in deionized water to obtain an AAm solution, the concentration of α-KG is 1g / L, and the concentration of MBAA is 1g / L; (3) the AMPS solution is irradiated under ultraviolet light, and the irradiation dose is 5× 10 3 J / m 2 , initiate AMPS polymerization, obtain prepolymer; (4) prepolymer, α-KG, SiO 2 Mix evenly, the mass percentage of each component is: prepolymer 60%, α-KG 1%, SiO 2 (5) scrape the casting solution through a film forming machine to obtain a liquid film with a thickness of 20-2000 μm, and irradiate and cross-link under ultraviolet light, and the irradiation dose is 5×10 3 J / m 2 , to obtain the first network film; (6) soak the first network film in...

Embodiment 2

[0042] (1) Mix and dissolve NaSS and Darocur 1173 in deionized water according to the concentration requirements in Table 2 to obtain a NaSS solution. The concentration of Darocur 1173 is 20g / L; (2) AAc, Darocur 1173, DVB Mix and dissolve in deionized water to obtain AAc solution, the concentration of Darocur 1173 is 20g / L, and the concentration of DVB is 20g / L; (3) NaSS solution is irradiated under ultraviolet light, and the irradiation dose is 5×10 4 J / m 2 , initiate NaSS polymerization, obtain prepolymer; (4) prepolymer, Darocur 1173 are uniformly mixed, and the mass percent of each component is: prepolymer 95%, Darocur 1173 is 5%, obtains casting solution; (5 ) scrape the cast film solution through a film forming machine to obtain a liquid film with a thickness of 20-2000 μm, irradiate and cross-link under ultraviolet light, and the irradiation dose is 5×10 4 J / m 2 , to obtain the first network film; (6) soak the first network film in the AAc solution for 20 hours, take ...

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Abstract

The invention discloses a preparation method for a high-strength hydrogel filtering membrane. The preparation method comprises the following steps: preliminarily polymerizing a first monomer under the initiation of ultraviolet radiation, mixing an obtained prepolymer solution, a cross-linking agent and a reinforcing gent, perform blade coating on the mixture to form a membrane, and performing further cross-linking polymerization to obtain a first net hydrogel membrane under the initiation of ultraviolet radiation; swelling the first net hydrogel membrane in a second monomer solution, and taking out and polymerizing the first net hydrogel membrane to form a second net to obtain a double-net hydrogel membrane under the initiation of ultraviolet radiation; completely washing the double-net hydrogel membrane in de-ionized water to obtain the high-strength hydrogel filtering membrane. According to the preparation method, micron and nanometer holes in the hydrogel membrane can be used as water penetration passages and particles with larger particle sizes cannot penetrate through the hydrogel membrane, so that the obtained hydrogel filtering membrane has the characteristic of selective separation, and can be applied to the membrane separation fields of oil-water separation, protein filtration, hematodialysis and the like.

Description

technical field [0001] The invention relates to a preparation method of a high-strength hydrogel filtration membrane, which belongs to the technical field of functional materials and membrane separation. Background technique [0002] Commonly used membrane filtration materials such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), polysulfone (PSF), etc., have strong hydrophobicity due to their low surface energy. , it is very easy to cause organic matter (protein, etc.) to adsorb on the surface of the membrane and in the pores of the membrane, resulting in membrane fouling and serious attenuation of the filtration flux. In view of this characteristic, one method to reduce membrane fouling is the hydrophilic modification of hydrophobic membranes. Commonly used hydrophilic modification methods include blending modification, surface coating modification, surface grafting modification, etc. These methods have disadvantages suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
Inventor 朱利平刘璀静张培斌王章慧胡帆
Owner ZHEJIANG UNIV
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