Preparation method of nanofiber separation composite membrane with gluing transition layer

A technology of nanofibers and transition layers, applied in the field of preparation of nanofiber separation composite membranes, can solve the problems of infiltration into the pores of basement membranes, difficulty in application and promotion, and decrease in membrane water flux, achieving low cost, convenience and accuracy The effect of hydrophilicity and easy availability of raw materials

Inactive Publication Date: 2011-11-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method of surface coating modification on the support base film material has great disadvantages, because the reason why these base film materials can become support materials is not only because they have certain mechanical strength, but more importantly It is because these supporting base membranes have a high porosity that can provide a large filtration water flux, and it is precisely because of the high porosity of the base membrane that the coat

Method used

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  • Preparation method of nanofiber separation composite membrane with gluing transition layer
  • Preparation method of nanofiber separation composite membrane with gluing transition layer

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Dissolve 30g of polyethersulfone in 70g of N,N-dimethylacetamide to obtain a transparent and uniform electrospinning solution; add the spinning stock solution into the container, and control the extrusion by a micro-injection pump. High-voltage positive electrode, electrospinning parameters controlled at voltage 24kv, nozzle aperture 1.8mm, solution flow rate 16μl / min, ambient temperature 25°C, air relative humidity 35%, electrospinning, the obtained polyethersulfone electrospun nanofibers The average diameter is 435nm, the deposition thickness is 45μm, and the porosity is 91%;

[0029] (2) Dissolve 15g of polyvinyl alcohol in 1L of water, and stir until the solution is clear and transparent;

[0030] (3) Soak the polyethersulfone nanofiber membrane in the polyvinyl alcohol solution for 24 hours, apply a chitosan acetic acid solution with a concentration of 5 wt% on the surface of the modified nanofiber membrane after appropriate treatment, and dry in the shade for ...

Embodiment 2

[0033] (1) Dissolve 20g of polysulfone in 80g of N,N-dimethylformamide to obtain a transparent and uniform electrospinning solution; add the spinning stock solution into the container, and control the extrusion by a micro-injection pump, and connect the nozzle to high pressure For the positive electrode, the electrospinning parameters are controlled at a voltage of 20kv, the nozzle aperture is 1.8mm, the solution flow rate is 20μl / min, the ambient temperature is 25°C, and the relative air humidity is 50%. Electrospinning is performed, and the average diameter of the obtained polysulfone electrospun nanofibers is is 850nm, the deposition thickness is 50μm, and the porosity is 87%;

[0034] (2) Select disodium hydrogen phosphate-potassium dihydrogen phosphate with a pH value of 4 as a buffer solution, and dissolve 1 g of dopamine in 1L disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution;

[0035] (3) Immerse the polysulfone nanofibrous membrane in the dopa...

Embodiment 3

[0038] (1) Dissolve 15g of polyacrylonitrile in 85g of N,N-dimethylformamide to obtain a transparent and uniform electrospinning solution; add the spinning stock solution into the container, and extrude it under the control of a micro-injection pump. High-voltage positive electrode, electrospinning parameters controlled at voltage 18kv, nozzle aperture 1.8mm, solution flow rate 30μl / min, ambient temperature 25°C, air relative humidity 45%, electrospinning, the obtained polyacrylonitrile electrospun nanofibers The average diameter is 600nm, the deposition thickness is 60μm, and the porosity is 93%;

[0039] (2) Tris-hydrochloric acid with a pH value of 9.0 was selected as a buffer solution, and 2 g of dopamine hydrochloride was dissolved in 1 L of tris-hydrochloric acid buffer solution to prepare a dopamine hydrochloride solution.

[0040] (3) Prepare a dopamine hydrochloride solution with a concentration of 2.0 g / L. Soak the polyacrylonitrile-based film in the dopamine soluti...

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Abstract

The invention relates to a preparation method of a nanofiber separation composite membrane with a gluing transition layer. The method comprises the steps of: (1) preparing a gluing layer macromolecule solution; (2) immersing a nanofiber non-woven fabric into the gluing layer macromolecule solution for treatment, so that a gluing layer can form on the surface of the nanofiber non-woven fabric; (3) preparing a functional barrier layer on the gluing layer, and conducting a heat treatment or chemical treatment finally, thus obtaining the nanofiber separation composite membrane. Being simple and practicable, the preparation method provided in the invention has easily available raw materials and low cost. And the nanofiber separation composite membrane of the invention can be widely used in the fields of nanofiltration, reverse osmosis and the like.

Description

technical field [0001] The invention belongs to the field of preparation of polymer separation membranes, in particular to a preparation method of a nanofiber separation composite membrane with an adhesive transition layer. Background technique [0002] The shortage of fresh water resources has become one of the three major environmental problems in the 21st century. Industrial wastewater, domestic sewage, farmland sewage, mine sewage, etc. have caused great pollution to water resources. my country is a serious water-scarce country. With the development of economy and the increase of population, the demand for water resources continues to increase, coupled with the unreasonable exploitation and utilization of water resources, the contradiction of water resource shortage is deepening. , while sewage treatment, seawater desalination and other approaches have become the most economical, effective and long-term solutions to solve the shortage of fresh water resources. [0003] ...

Claims

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Application Information

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IPC IPC(8): B32B27/04B32B27/06B32B27/12B32B33/00
Inventor 王雪芬赵珺阎怡瑾高燕陈佳佳
Owner DONGHUA UNIV
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