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Preparation method of dopamine composite nanofiber affinity membrane for adsorption of la3+

A technology of composite nanofibers and dopamine, applied in fiber processing, textile and papermaking, conjugated synthetic polymer rayon, etc., can solve problems such as loss of function, and achieve the effect of low cost, easy availability of raw materials and high specific surface area

Inactive Publication Date: 2015-10-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since only the functional groups on the surface of the fiber can contact with the target body and perform its function, while the functional groups in the fiber lose the opportunity to contact with the target body due to the coating effect, thus losing their function

Method used

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  • Preparation method of dopamine composite nanofiber affinity membrane for adsorption of la3+
  • Preparation method of dopamine composite nanofiber affinity membrane for adsorption of la3+

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Effect test

Embodiment 1

[0027] (1) Dissolve 15g of polyacrylonitrile PAN and polysulfone PSF in a weight ratio of 1:1 in 85g of N,N'-dimethylacetamide DMAc, and stir at 60°C for 24h to obtain a homogeneous Electrospinning solution: Add the spinning solution into the container, and extrude it under the control of a micro-injection pump. The nozzle is connected to a high-voltage positive electrode. The electrospinning parameters are voltage 25KV, nozzle aperture 1.5mm, solution flow rate 1.5ml / h, ambient temperature 25 ℃, air relative humidity 35%, electrospinning, the obtained PAN-PSF composite nanofibers have an average diameter of 600nm, a deposition thickness of 100μm, and a porosity of 92%.

[0028] (2) Soak the PAN-PSF composite nanofiber membrane obtained in (1) into the Tris-HCl solution of 1.0g / L dopamine, adjust the pH=8.0, soak at 25°C for 5-12h, and take out the membrane , washed with deionized water, and dried to obtain a dopamine composite nanofiber affinity membrane with a micro-nano str...

Embodiment 2

[0030] (1) Dissolve 10g of polystyrene PEO and polyethersulfone PES in a weight ratio of 1:9 in 90g of N,N'-dimethylformamide DMF, and stir at 80°C for 80h to obtain a homogeneous The electrospinning solution; the spinning solution is added to the container, and the extrusion is controlled by a micro-injection pump. The nozzle is connected to a high-voltage positive electrode. The electrospinning parameters are voltage 30KV, nozzle aperture 2mm, solution flow rate 0.8ml / h, and ambient temperature 30 ℃, relative air humidity of 50%, and electrospinning, the obtained PEO-PES composite nanofibers have an average diameter of 500 nm, a deposition thickness of 100 μm, and a porosity of 94%.

[0031] (2) Soak the PEO-PES composite nanofiber membrane obtained in (1) into the Tris-HCl solution of 3.0g / L dopamine, adjust the pH=9.0, soak at 30°C for 10-20h, and take out the membrane , washed with deionized water, and dried to obtain a dopamine composite nanofiber affinity membrane with ...

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Abstract

The invention relates to a preparation method of a dopamine composite nano-fiber affinity membrane for adsorbing La3+. The preparation method comprises the steps of (1) dissolving polymer materials in a solvent to obtain a polymer blended solution with the mass percentage concentration of 8%-30%, and then obtaining a composite nano-fiber membrane through electrostatic spinning, and (2) soaking the composite nano-fiber membrane in a Tris-HCl solution of dopamine, and obtaining the dopamine composite nano-fiber affinity membrane for adsorbing the rare-earth metal ion La3+. The preparation method is simple and practical, raw materials can be easily obtained, the cost is low, the dopamine composite nano-fiber affinity membrane for adsorbing the La3+ can be conveniently and accurately prepared, and the large-scale production operation can be easily achieved. According to the preparation method, the dopamine composite nano-fiber affinity membrane with the high specific surface area can be widely applied to the fields such as rare-earth metal La3+ gathering, rare-earth metal La3+ adsorbing, rare-earth metal La3+ separation, chemical probes, sensors and water treatment.

Description

technical field [0001] The invention belongs to the field of preparation of polymer adsorption separation affinity membranes, in particular to a method for adsorbing La 3+ Preparation method of dopamine composite nanofiber affinity membrane. Background technique [0002] The podocytes of marine organisms mussels can secrete a super-strength mucus, which can solidify into foot silk in seawater and adhere tightly to the surface of the substrate. The main component of this mussel is mussel adhesion protein (MAPs). It cures rapidly in moist environments and forms a strong bond to substrate surfaces. Studies have found that MAPs contain a large number of L-dopa and lysine residues, which are the key components that endow MAPs with special adhesion functions. As a catechol derivative of L-dopa, dopamine (Dopamine) (molecular formula is C 6 h 3 (OH) 2 -CH 2 -CH 2 -NH 2 , the English name is 4-(2-aminoethyl)benzene-1,2-diol, the Chinese name is 4-(2-ethylamino)benzene-1,2-di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01F8/08D01F8/16D01F8/10
Inventor 王雪芬洪贵山杨寅李雄王敏神领弟
Owner DONGHUA UNIV
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