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Preparation method of biomass-based molecularly imprinted composite membrane for selectively separating tetracycline

A technology of molecular imprinting and tetracycline, applied in separation methods, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of poor hydrophilicity, low selectivity of molecular imprinting membranes, non-biodegradable, etc., and achieve easy recovery and selection Strong adsorption capacity, solve the effect of difficult recovery

Active Publication Date: 2020-04-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical defects existing in the prior art, solve the problems of low selectivity, poor hydrophilicity, and non-biodegradability of traditional molecularly imprinted membranes, so that the selective separation efficiency of the target molecule (tetracycline) is greatly improved, And the molecularly imprinted membrane itself is a biodegradable material, which will not cause secondary pollution to the environment

Method used

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  • Preparation method of biomass-based molecularly imprinted composite membrane for selectively separating tetracycline
  • Preparation method of biomass-based molecularly imprinted composite membrane for selectively separating tetracycline
  • Preparation method of biomass-based molecularly imprinted composite membrane for selectively separating tetracycline

Examples

Experimental program
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Effect test

Embodiment 1

[0051] S1, preparation of modified biomass activated carbon nanoparticles (k-ACNPs):

[0052] First, 0.5 g of biomass-based activated carbon nanoparticles (ACNPs) and 3 mL of γ-(methacryloxy)propyltrimethoxysilane (kh570) were dispersed in a mixed solution including 80 mL of ethanol and 20 mL of water, and then the mixture was placed in Heat and reflux at 80°C for 24 hours. After the reaction, wash with ethanol and distilled water three times respectively, centrifuge the modified nanoparticles at 10,000 rpm for 5 minutes, and dry in vacuum at 60°C to obtain k-ACNPs.

[0053] S2. Preparation of nano-activated carbon doped cellulose and chitosan hybrid (k-AC@CA / CS) basement membrane:

[0054] First, 0.9 g of k-ACNPs prepared in S1 was added to 40 mL of 0.1 g chitosan (CS), 3 g cellulose acetate (CA), 0.5 g polyvinyl alcohol (PVA) and 0.2 g polyvinylpyrrolidone (PVP) In the dimethyl sulfoxide solution; the mixed solution was heated in a constant temperature water bath at 50°C an...

Embodiment 2

[0061] S1, preparation of modified biomass activated carbon nanoparticles (k-ACNPs):

[0062] First, 1.0 g of biomass-based activated carbon nanoparticles (ACNPs) and 3 mL of γ-(methacryloxy)propyltrimethoxysilane (kh570) were dispersed in a mixed solution including 80 mL of ethanol and 20 mL of water, and then the mixed solution was Heat and reflux at 80°C for 24 hours; after the reaction, wash with ethanol and distilled water three times respectively, centrifuge the modified nanoparticles at 10,000 rpm for 10 minutes, and dry in vacuum at 65°C to obtain k-ACNPs;

[0063] S2. Preparation of nano-activated carbon doped cellulose and chitosan hybrid (k-AC@CA / CS) basement membrane:

[0064] First, 0.9 g of k-ACNPs prepared in S1 was added to 40 mL of 0.1 g chitosan (CS), 3 g cellulose acetate (CA), 0.5 g polyvinyl alcohol (PVA) and 0.2 g polyvinylpyrrolidone (PVP) In the dimethyl sulfoxide solution, the mixed solution was heated in a constant temperature water bath at 45°C and ...

Embodiment 3

[0072] S1, preparation of modified biomass activated carbon nanoparticles (k-ACNPs):

[0073] First, 1.5 g of biomass-based activated carbon nanoparticles (ACNPs) and 3 mL of γ-(methacryloxy)propyltrimethoxysilane (kh570) were dispersed in a mixed solution including 80 mL of ethanol and 20 mL of water, and then the mixture was placed in Heat and reflux at 80°C for 24 hours; after the reaction, wash with ethanol and distilled water three times respectively, centrifuge the modified nanoparticles at 10,000 rpm for 5 minutes, and dry in vacuum at 70°C to obtain k-ACNPs;

[0074] S2. Preparation of nano-activated carbon doped cellulose and chitosan hybrid (k-AC@CA / CS) basement membrane:

[0075] First, 0.9 g of k-ACNPs prepared in S1 was added to 40 mL of 0.1 g chitosan (CS), 3 g cellulose acetate (CA), 0.5 g polyvinyl alcohol (PVA) and 0.2 g polyvinylpyrrolidone (PVP) In the dimethyl sulfoxide solution, the mixed solution was heated in a constant temperature water bath at 40°C and ...

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Abstract

The invention belongs to the technical field of functional material preparation, and particularly relates to a preparation method of a molecularly imprinted composite membrane for selectively separating tetracycline. The preparation method comprises the following steps: preparing a basement membrane from cellulose acetate and chitosan; preparing the tetracycline molecularly imprinted composite membrane by taking biomass nano activated carbon as a doping material, tetracycline as a template, acrylamide and methacrylic acid as functional monomers, ethylene glycol dimethacrylate as a cross-linking agent and azodiisobutyronitrile as an initiator and combining nano material doping technology and molecularly imprinted polymerization technology. Based on a biomass material synthesis strategy andin combination with the doping of biomass nano activated carbon and the synergistic effect of a bifunctional monomer, the prepared material has the advantages of high flux and strong selective adsorption capacity, so that the separation efficiency of the material on tetracycline in a complex mixed system is greatly improved; in addition, since the base membrane raw material of the molecularly imprinted membrane is a biomass and renewable material, the molecularly imprinted membrane has good biodegradability.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a method for preparing a molecularly imprinted composite membrane for selectively separating tetracyclines. Background technique [0002] Tetracycline has become one of the most widely used antibiotics in the world because of its low price and broad-spectrum antibacterial properties. It is not only a commonly used human antibiotic drug, but also used as a growth promoter and agricultural additive in the animal husbandry industry, and is widely used in agriculture and animal husbandry. my country is a big country in the production, use and sales of tetracycline antibiotics, and the amount of tetracycline antibiotics used in my country's livestock and poultry industry is also the largest. Tetracycline antibiotics enter the environment mainly through livestock and poultry and aquaculture, medical treatment and industrial discharge. After bei...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08J7/16C08J5/18C08L1/12C08L5/08C08L29/04C08L39/06C08K9/06C08K7/24B01D71/82B01D69/12B01D69/02B01D67/00B01J20/26B01J20/28B01J20/30B01D61/00B01D15/00
CPCC08J9/26C08J7/16C08J5/18B01D71/82B01D69/125B01D69/02B01D67/0079B01J20/268B01J20/28033B01J20/20B01J20/24B01D61/00B01D15/00B01D2325/12C08K9/06C08K7/24C08K2201/011C08J2301/12C08J2405/08C08J2429/04C08J2439/06
Inventor 邢文东吴易霖李春香闫永胜
Owner JIANGSU UNIV
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