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Modified composite fiber membrane and layer-by-layer self-assembly method and application thereof

A layer-by-layer self-assembly and composite fiber membrane technology, applied in the field of materials, can solve problems such as low efficiency, long time, environmental pollution, etc., and achieve the effect of expanding the selection range, convenient operation, and expanding the application range

Active Publication Date: 2019-06-07
奥美佰玛(武汉)生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common surface modification methods include vulcanization, glow discharge, ultraviolet radiation, etc., which are limited by low efficiency, long time, and serious environmental pollution.

Method used

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  • Modified composite fiber membrane and layer-by-layer self-assembly method and application thereof
  • Modified composite fiber membrane and layer-by-layer self-assembly method and application thereof
  • Modified composite fiber membrane and layer-by-layer self-assembly method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for self-assembly of modified composite fiber membrane layer by layer, comprising the following steps:

[0031] S1, Preparation of polystyrene micro / nanofibrous membrane (PS) by electrospinning technique.

[0032] Specifically, polystyrene was dissolved in a mixed solution of tetrahydrofuran and N,N-dimethylformamide (mass ratio 1:1) to obtain a 10 wt% polystyrene solution. Then polystyrene micro / nanofiber membrane (PS) was prepared by electrospinning technology, the process parameters were: electrospinning voltage was 20kV, solution flow rate was 1mL / h, receiving distance was 15cm, temperature was 25°C, relative humidity was 40%. Subsequently, the obtained polystyrene micro / nanofiber membrane was vacuum-dried at 60° C. to fully evaporate the remaining solvent.

[0033] S2, Plasma modification of polystyrene micro / nanofiber membrane to obtain a base plate with a large amount of negative charge on the surface (PS O ).

[0034] Specif...

Embodiment 2

[0045] This embodiment provides a method for self-assembly of modified composite fiber membrane layer by layer, comprising the following steps:

[0046] S1, Fabrication of polymethyl methacrylate micro / nanofibrous membranes by electrospinning technique.

[0047] Specifically, polyacrylonitrile was dissolved in a tetrahydrofuran solution to obtain a 10 wt% polyacrylonitrile solution. Then, polymethyl methacrylate micro / nanofiber membranes were prepared by electrospinning technology. The process parameters were as follows: electrospinning voltage was 20kV, solution flow rate was 1mL / h, receiving distance was 15cm, temperature was 25°C, and relative humidity was 40%. Subsequently, the obtained polymethylmethacrylate micro / nanofiber membrane was vacuum-dried at 60° C. to fully volatilize the remaining solvent.

[0048] S2, Plasma modification of polymethyl methacrylate micro / nano fiber membrane to obtain a bottom plate with a large amount of negative charge on the surface.

[0...

Embodiment 3

[0055] This embodiment provides a method for self-assembly of modified composite fiber membrane layer by layer, comprising the following steps:

[0056] S1, Preparation of polyacrylonitrile micro / nanofiber membranes by electrospinning technique.

[0057] Specifically, polyacrylonitrile was dissolved in N,N-dimethylformamide solution to obtain a 10 wt% polyacrylonitrile solution. Then, the polyacrylonitrile micro / nano fiber membrane was prepared by electrospinning technology, and the process parameters were as follows: the electrospinning voltage was 18kV, the solution flow rate was 0.8mL / h, the receiving distance was 15cm, the temperature was 25°C, and the relative humidity was 40%. . Subsequently, the obtained polyacrylonitrile micro / nanofiber membrane was vacuum-dried at 60° C. to fully evaporate the remaining solvent.

[0058] S2, Plasma modification of polyacrylonitrile micro / nanofiber membrane to obtain a bottom plate with a large amount of negative charge on the surfac...

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Abstract

The invention relates to a modified composite fiber membrane and a layer-by-layer self-assembly method and application thereof. The layer-by-layer self-assembly method of the modified composite fibermembrane includes the following steps that a micro / nano high-molecular fiber membrane is prepared; the surface of the micro / nano high-molecular fiber membrane is subjected to plasma modification, anda bottom plate is obtained; a polyelectrolyte A and a polyelectrolyte B which have opposite charges are alternately assembled on the bottom plate with a soaking layer-by-layer self-assembly technologyuntil the required layer number reaches, and the modified composite fiber membrane is obtained. Compared with a traditional layer-by-layer self-assembly method, the layer-by-layer self-assembly method of the modified composite fiber membrane is easy and convenient to operate and high in efficiency, materials which are originally hydrophobic and are not suitable for the fields of biological medicine, environmental protection and the like can have good biocompatibility, the performance of promoting cell reproduction and the like, a selection range of the bottom plate is remarkably widened, andmeanwhile an application range of the layer-by-layer self-assembly method of the modified composite fiber membrane is widened.

Description

technical field [0001] The invention relates to the field of materials, in particular to a modified composite fiber membrane and its layer-by-layer self-assembly method and application. Background technique [0002] Layer-by-layer self-assembly is a simple, effective, flexible, and repeatable technique for modifying the surface of materials and preparing highly ordered multilayer films. In addition, layer-by-layer self-assembly can realize nanoscale film thickness control and a wide range of substrates and film-forming substances, so it has been applied in the fields of catalysis, detection and biomaterials, and has gradually developed into a relatively mature multilayer film preparation technology. Layer-by-layer self-assembly technology can be divided into immersion method, spin coating method, spray method, etc. according to different self-assembly methods, among which the immersion method is the most widely explored and applied. The layer-by-layer self-assembly of soaki...

Claims

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Application Information

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IPC IPC(8): D06M10/10D04H1/728C12N5/00C12N5/077D06M101/28D06M101/26D06M101/20
Inventor 邓红兵贾赵恒卢晓佩陈琳
Owner 奥美佰玛(武汉)生物科技有限公司
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