Zeolite imidazate framework nanoparticle composite fiber film and preparation method thereof

A technology of zeolite imidazolate and composite fiber membrane, which is applied in the field of composite materials, can solve problems such as poor operability, aggregation of nanocrystalline fillers, uneven dispersion, etc., to solve uniform composite problems, improve gas adsorption capacity, The effect of improving the adsorption capacity

Inactive Publication Date: 2017-07-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although zeolitic imidazolate frameworks have great application potential, the poor manipulability of metal-organic framework complex materials in nature severely limits their industrial application due to the loose powdery nature, thus requiring effective shaping or linking steps. To create zeolitic imidazolate frameworks suitable for large-scale production and application of molecular modules
The traditional method directly mixes metal-organic framework complex nanocrystals with high molecular weight polymers. The mixing process will lead to problems such as aggregation and uneven dispersion of nanocrystal fillers.

Method used

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  • Zeolite imidazate framework nanoparticle composite fiber film and preparation method thereof
  • Zeolite imidazate framework nanoparticle composite fiber film and preparation method thereof
  • Zeolite imidazate framework nanoparticle composite fiber film and preparation method thereof

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Effect test

Embodiment 1

[0031] A preparation method for a zeolite imidazolate framework nanoparticle composite fiber membrane, comprising the following steps:

[0032] (1) Mix Zn(NO 3 ) 2 ·6H 2 O and benzimidazole solution, the Zn(NO 3 ) 2 ·6H 2 The content of O in the solution is 8wt%, and the content of the benzimidazole in the solution is 4wt%;

[0033] (2) Immediately add polyvinylidene fluoride (PVDF, Mw=120kDa) powder to the solution in step (1) to obtain a mixed solution, the content of which is 6wt%;

[0034] (3) Stir the mixed solution obtained in step (2) at 50° C. for 3 days to crystallize the zeolite imidazolate framework complex into nanoparticles to obtain a precursor solution;

[0035] (4) Add the electrospinning precursor solution obtained in step (3) into the liquid storage mechanism of the electrospinning device, and the electrospinning precursor solution obtains a zeolite imidazolate framework nanoparticle composite fiber membrane, and the electrospinning experimental conditi...

Embodiment 2

[0037] Example 2 Absorption capacity test of carbon dioxide

[0038] Test and compare the carbon dioxide adsorption rate of the composite fiber membrane obtained by PVDF nanofiber membrane and embodiment 1 under different air pressures, wherein, the preparation method of PVDF nanofiber membrane comprises the following steps: (1) polyvinylidene fluoride (PVDF, Mw= 120kDa) powder into DMF, fully stirred at 50°C to obtain a mixed solution, the resulting mixed solution is a precursor solution; (2) Add the precursor solution obtained in step (1) to the liquid storage mechanism of the electrospinning device, and electrospin The PVDF nanofiber membrane was obtained from the precursor solution. The electrospinning experimental conditions were room temperature, humidity 35-40%, the propulsion speed of the propulsion pump of the liquid storage mechanism was 0.25μL / min, the spinning voltage was 8KV, and the spinning distance was 10cm. The inner diameter of the nozzle is 0.84mm.

[0039]...

Embodiment 3

[0044] A preparation method for a zeolite imidazolate framework nanoparticle composite fiber membrane, comprising the following steps:

[0045] (1) Mix Zn(NO 3 ) 2 ·6H 2 O and benzimidazole solution, the Zn(NO 3 ) 2 ·6H 2 The content of O in the solution is 8wt%, and the content of the benzimidazole in the solution is 4wt%;

[0046] (2) immediately add polyacrylonitrile (PAN, Mw=150kDa) powder to the solution of step (1), the content of PAN in the mixed solution is 6wt%;

[0047] (3) Stir the mixed solution obtained in step (2) at 50° C. for 3 days to crystallize the zeolite imidazolate framework complex into nanoparticles to obtain a precursor solution;

[0048] (4) Add the electrospinning precursor solution obtained in step (3) into the liquid storage mechanism of the electrospinning device, and the electrospinning precursor solution obtains a zeolite imidazolate framework nanoparticle composite fiber membrane, and the electrospinning experimental condition is room tem...

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Abstract

The invention discloses a zeolite imidazate framework nanoparticle composite fiber film and a preparation method thereof; the method uses the static spinning technology to carry out in-situ preparation of the polymer composite fiber film containing the zeolite imidazate framework nanoparticles; the zeolite imidazate framework nanoparticles are evenly distributed in the composite fiber film, and the zeolite imidazate framework nanoparticle content in the composite fiber film is 10-15wt%; the composite fiber film has strong gas adsorption capability, and the zeolite imidazate framework nanoparticles are evenly composited in the high-molecular matrix, thus improving the application values of same in real life.

Description

technical field [0001] The invention relates to a composite material, in particular to a zeolite imidazolate framework nanoparticle composite fiber membrane and a preparation method thereof. Background technique [0002] Due to its small diameter, large specific surface area, good permeability, small pore size, and good pore connectivity, electrospun nanofibers are suitable as filter materials for purification (mainly used for gas filtration and liquid filtration). For example, in terms of gas filtration, the filtration efficiency of electrospun nylon 6 nanofibers for particles with a particle size below 0.3 microns can reach 99.993%. In terms of liquid filtration, the electrospun polysulfone nanofiber membrane has a filtration efficiency of 99% for polystyrene particles with a particle size of 7-9 microns, and the fiber membrane will not be blocked; for particles with a particle size of 1-2 microns , Form a filter cake on the fiber membrane; for particles with a particle s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D04H1/4282D01F6/48D01F1/10C08G83/00B01D53/22B01D53/02
CPCB01D53/02B01D53/228B01D2257/504C08G83/008D01D5/003D01F1/10D01F6/48D04H1/4282D04H1/728Y02C20/40Y02P20/151Y02P70/62
Inventor 龙云泽周旭波王晓雄张俊闫旭韩明初阎世英
Owner QINGDAO UNIV
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