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Graphene oxide@high polymer nanofiber multilayer film and preparation method and application thereof

A nanofiber membrane, nanofiber technology, applied in fiber processing, coating, textiles and papermaking, etc., can solve problems such as limitations, achieve the effect of simple method, simple and efficient overall process, and large-scale industrial production

Inactive Publication Date: 2016-12-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, graphene oxide sheets will be partially loaded into nanofibers, limiting their better function

Method used

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  • Graphene oxide@high polymer nanofiber multilayer film and preparation method and application thereof
  • Graphene oxide@high polymer nanofiber multilayer film and preparation method and application thereof
  • Graphene oxide@high polymer nanofiber multilayer film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] To prepare graphene oxide@nylon 6 nanofiber multilayer film, the specific steps are as follows:

[0047] Step 1: preparing graphene oxide solution: using the graphene oxide aqueous solution prepared by the improved Hummers method, and then adopting vacuum freeze-drying to obtain graphene oxide powder. A certain amount of graphene oxide was added to a 1:1 mixed solution of water and dimethylformamide (DMF), ultrasonicated for 2 hours, and magnetically stirred for 5 hours to obtain a uniformly dispersed graphene oxide solution A. The mass fraction of graphene oxide in the solution is 0.5%.

[0048] Step 2: Add 3g of nylon 6 into 17.64g of formic acid and acetic acid mixed solution (the mass ratio of formic acid and acetic acid is 7:3), sonicate for 2 hours, and magnetically stir for 12 hours to obtain completely dissolved nylon 6 solution B.

[0049] Step 3: Let the solution B stand for 1 hour to defoam, then transfer it to a 20mL syringe, and form a film by electrospinn...

Embodiment 2

[0056] The preparation method of graphene oxide@polyacrylonitrile nanofiber multilayer film, the specific steps are as follows:

[0057] Step 1: preparing graphene oxide solution: using the graphene oxide aqueous solution prepared by the improved Hummers method, and then adopting vacuum freeze-drying to obtain graphene oxide powder. A certain amount of graphene oxide was added to a 1:1 mixed solution of water and dimethylformamide (DMF), ultrasonicated for 2 hours, and magnetically stirred for 5 hours to obtain a uniformly dispersed graphene oxide solution A. The mass fraction of graphene oxide in the solution is 0.5%.

[0058] Step 2: Add 1 g of polyacrylonitrile into 9 g of dimethylformamide, sonicate for 2 hours, and magnetically stir for 12 hours to obtain a completely dissolved polyacrylonitrile solution B.

[0059] Step 3: Let the solution B stand for 1 hour to defoam, then transfer it to a 20mL syringe, and form a film by electrospinning, the spinning voltage is 12KV, ...

Embodiment 3

[0063] The preparation method of graphene oxide@polyvinylidene fluoride (PVDF) microporous membrane multilayer membrane, the specific steps are as follows:

[0064] Step 1: preparing graphene oxide solution: using the graphene oxide aqueous solution prepared by the improved Hummers method, and then adopting vacuum freeze-drying to obtain graphene oxide powder. A certain amount of graphene oxide was added to a 1:1 mixed solution of water and dimethylformamide (DMF), ultrasonicated for 2 hours, and magnetically stirred for 5 hours to obtain a uniformly dispersed graphene oxide solution A. The mass fraction of graphene oxide in the solution is 0.5%.

[0065] Step 2: Transfer solution A to a syringe, spray graphene oxide onto a polyvinylidene fluoride (PVDF) microporous filter membrane by electrostatic spraying, the electrostatic spraying voltage is 35KV, the relative humidity is 35-45%, and the temperature is 20-25°C, the advancing speed is 0.2mL / min. The receiving distance is ...

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Abstract

The invention discloses a graphene oxide@high polymer nanofiber multilayer film and its preparation method and application. The invention prepares a layer of high polymer nanofiber film by electrospinning, and then uniformly coats graphene oxide by electrostatic spraying. Spray on the polymer nanofiber film, and then prepare a layer of polymer nanofiber film on the graphene oxide film layer by electrospinning, and repeat this process to prepare multi-layer graphene oxide@polymer nanofiber film . The multi-layer membrane structure of the present invention has high GO loading capacity, high mechanical strength, good stability, and good pure water flux and nanofiltration performance, and can be applied to membrane separation fields such as air filtration, sewage treatment, and desalination.

Description

technical field [0001] The invention belongs to the technical field of composite film preparation, and relates to a graphene oxide@high polymer nanofiber multilayer film and its preparation method and application, in particular to a graphene oxide@high polymer nanofiber multilayer film structure material, and its A method for preparing the material by using electrospinning combined with electrostatic spraying, and the application of the material in membrane separation fields such as air filtration, sewage treatment, and desalination. Background technique [0002] Graphene is a carbon atom in a hexagonal structure through sp 2 The monoatomic layer 2D materials formed by hybridization have attracted extensive research interest and achieved remarkable progress in the field of permeation filtration membranes due to their unique structures in recent years. The perfect single-layer graphene can block the penetration of any atoms and molecules, and only allows the rapid and select...

Claims

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Application Information

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IPC IPC(8): D04H1/728B05D7/04B05D1/04D01D5/00
CPCD04H1/728B05D1/04B05D7/04D01D5/0084
Inventor 慈立杰陈龙
Owner SHANDONG UNIV
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