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Preparation method for ZnO/perfluoropolymer nanofiber photocatalytic membrane

A technology of perfluoropolymer and nanofiber membrane, which is applied in the field of photocatalysis, can solve the problems of easy degradation of fiber carrier, insufficient coating stability, and inability to control the loading amount, and achieve good photocatalytic performance, controllable loading amount, The effect of easy operation

Inactive Publication Date: 2016-06-29
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the existing impregnation method, coating method and other methods are complicated in process. Although photocatalysis and loading on the fiber carrier can be realized, the operating conditions need to be strictly controlled, and there is a problem that the fiber carrier is easy to degrade, and the film stability is poor. , and the coating stability is insufficient, the repeatability is poor, and the load cannot be adjusted

Method used

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  • Preparation method for ZnO/perfluoropolymer nanofiber photocatalytic membrane
  • Preparation method for ZnO/perfluoropolymer nanofiber photocatalytic membrane

Examples

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Embodiment 1

[0033] A preparation method of ZnO / perfluoropolymer nanofiber photocatalytic film, comprising the steps of:

[0034] A. Preparation of spinning solution

[0035] Take by weighing 5g polyvinyl alcohol (model: 1788, be abbreviated as PVA), utilize distilled water to be mixed with the aqueous solution that mass fraction is 10%; Add polytetrafluoroethylene (PTFE) water dispersion emulsion (solid content is 60wt%) 50g, (equivalent When the total solid content is 35.00%, PVA:PTFE is 1:6) to obtain a mixed solution, then add 20 g of zinc acetate (accounting for 20% of the mass of the mixed solution), and after continuous stirring, stand for defoaming for 12 hours to obtain a spinning solution;

[0036] B. Preparation of precursor nanofiber membrane

[0037] Inject the spinning solution obtained in step A into a 5ml electrospinning syringe device, set the spinning parameters as follows: the voltage is 25KV, the distance between the spinneret and the receiving disc is 10cm, the extrus...

Embodiment 2

[0042] A preparation method of ZnO / perfluoropolymer nanofiber photocatalytic film, comprising the steps of:

[0043] A. Preparation of spinning solution

[0044]Take by weighing 5g polyvinyl alcohol (model: 1788, abbreviated as PVA), be mixed with the aqueous solution that mass fraction is 10%, add polytetrafluoroethylene (PTFE) water dispersion emulsion 50g (solid content is 60wt%), (equivalent to total The solid content is 35.00%, wherein PVA: PTFE is 1:6) to obtain a mixed solution, then add 10 g of zinc acetate (accounting for 10% of the mixed solution mass) and continue to stir evenly, then stand for defoaming for 12 hours to obtain a spinning solution.

[0045] B. Preparation of precursor nanofiber membrane

[0046] The spinning solution obtained in step A was injected into three 5ml electrospinning syringe devices for multi-needle spinning. The spinning parameters are set as follows: the voltage is 20KV, the distance between the spinneret and the receiving disc is 8cm...

Embodiment 3

[0051] A preparation method of ZnO / perfluoropolymer nanofiber photocatalytic film, comprising the steps of:

[0052] A. Preparation of spinning solution

[0053] Take by weighing 2g polyvinyl alcohol (model: 1799), utilize distilled water to be mixed with the aqueous solution that mass fraction is 8%; Add polytetrafluoroethylene (PTFE) aqueous emulsion 26.67g (solid content is 60wt%), (equivalent to total solid content 34.84%, where PVA: PTFE is 1:8), to obtain the mixed solution, then add 5.17g of nano-ZnO powder (nano-ZnO powder accounts for 10% of the mass of the mixed solution), after continuous stirring, stand for defoaming for 12h, to obtain spinning solution;

[0054] B. Preparation of precursor nanofiber membrane

[0055] Inject the spinning solution obtained in step A into three 5ml electrospinning syringe devices, set the spinning parameters as follows: the voltage is 25KV, the distance between the spinneret and the receiving disc is 8cm, the extrusion speed is 6μl...

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Abstract

The invention discloses a preparation method for a ZnO / perfluoropolymer nanofiber photocatalytic membrane. The method comprises the steps that A, a carrier solution and a perfluoropolymer aqueous dispersion emulsion are mixed to be uniform, zinc salt or nanometer zinc oxide is added, the mixture is defoamed after being mixed to be uniform, and a spinning solution is obtained; B, the spinning solution obtained in the step A is injected in an electrostatic spinning device, and a precursor nanofiber membrane is prepared after electrostatic spinning and vacuum drying; C, the precursor nanofiber membrane is sintered and then cooled to room temperature, and the ZnO / perfluoropolymer nanofiber photocatalytic membrane is obtained. The method is simple in process and high in controllability and reusability, and the prepared ZnO / perfluoropolymer nanofiber photocatalytic membrane is stable in photocatalytic performance and easy to recover after being used.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a method for preparing a ZnO / perfluoropolymer nanofiber photocatalytic film. Background technique [0002] The quantum size effect, small size effect, surface effect and interface effect of nanomaterials make them have a series of excellent macroscopic effects such as electricity, magnetism, light, mechanics and chemistry, especially in challenging fields such as photocatalysis and photoelectric conversion. Zinc oxide, ZnO, is a wide bandgap semiconductor material with a bandgap width of 3.2eV, and as the particle size of zinc oxide decreases, its bandgap width gradually increases, and it is very strong against sunlight, especially ultraviolet light. Absorption capacity, photocatalytic properties, can degrade organic pollutants, play an extremely important role in the control of environmental pollution. However, nanopowders have defects such as easy aggregation, easy loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/10A62D3/17D04H1/728D01D5/00
CPCA62D3/17D01D5/0015D04H1/728B01J31/26A62D2101/26A62D2101/28B01J35/59B01J35/612B01J35/638B01J35/39
Inventor 黄庆林黄岩刘欢肖长发
Owner TIANJIN POLYTECHNIC UNIV
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