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Metal organic framework/carbon nanofiber composite membrane material and preparation method thereof

A metal-organic framework, carbon nanofiber technology, applied in the direction of carbon fiber, fiber processing, separation methods, etc., can solve the problems of powder or granular limited practical application, instability of metal-organic framework materials, etc., to achieve excellent mechanical properties and thermodynamic stability stable and continuous growth, and the effect of promoting heterogeneous nucleation

Inactive Publication Date: 2017-09-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a metal organic framework / carbon nanofiber composite membrane material and its preparation method, to solve the problem that the instability of the metal organic framework material and the powder or granular form limit its practical application

Method used

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  • Metal organic framework/carbon nanofiber composite membrane material and preparation method thereof
  • Metal organic framework/carbon nanofiber composite membrane material and preparation method thereof
  • Metal organic framework/carbon nanofiber composite membrane material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A metal organic framework / carbon nanofiber composite membrane material includes a carbon nanofiber membrane, and a metal organic framework layer grows on the surface of the nanofiber in the carbon nanofiber membrane.

[0030] The preparation method of the metal organic framework / carbon nanofiber composite membrane material is:

[0031] (1) Preparation of flexible carbon nanofiber membrane:

[0032] At a room temperature of 25° C., 5 g of polyvinyl butyral was dissolved in 45 g of methanol in a stirred tank, and stirred at a rotation speed of 1200 rpm for 12 hours to obtain an electrospinning raw material with a mass fraction of 10%. The obtained electrospinning raw material was added to an electrospinning device, and electrospinning was carried out under the conditions of a static voltage of 25kV, a flow rate of a syringe pump of 1mL / h, and a distance of 20cm between the spinneret and the receiving screen to obtain polyvinyl alcohol shrinkage. Butyraldehyde nanofiber mem...

Embodiment 2

[0042] A metal organic framework / carbon nanofiber composite membrane material includes a carbon nanofiber membrane, and a metal organic framework layer grows on the surface of the nanofiber in the carbon nanofiber membrane.

[0043] The preparation method of the metal organic framework / carbon nanofiber composite membrane material is:

[0044] (1) Preparation of flexible carbon nanofiber membrane:

[0045] At a room temperature of 25° C., 5 g of polyimide was dissolved in 45 g of N,N-dimethylformamide in a stirred tank, and stirred at a rotation speed of 1100 rpm for 12 hours to obtain an electrospinning raw material with a mass fraction of 10%. The obtained electrospinning raw material was added to an electrospinning device, and electrospinning was performed under the conditions of a static voltage of 28kV, a flow rate of a syringe pump of 1mL / h, and a distance of 18cm between the spinneret and the receiving screen to obtain a polyimide nanofibrous membrane.

[0046] The pol...

Embodiment 3

[0054] A metal organic framework / carbon nanofiber composite membrane material includes a carbon nanofiber membrane, and a metal organic framework layer grows on the surface of the nanofiber in the carbon nanofiber membrane.

[0055] The preparation method of the metal organic framework / carbon nanofiber composite membrane material is:

[0056] (1) Preparation of flexible carbon nanofiber membrane:

[0057] At a room temperature of 25° C., 4 g of polyacrylonitrile was dissolved in 46 g of N,N-dimethylformamide in a stirred tank, and stirred at a rotation speed of 1000 rpm for 10 h to obtain an electrospinning raw material with a mass fraction of 8%. The obtained electrospinning raw material was added to an electrospinning device, and electrospinning was carried out under the conditions of a static voltage of 25kV, a flow rate of a syringe pump of 0.8mL / h, and a distance of 20cm between the spinneret and the receiving screen to obtain polyacrylonitrile nanofibrous membrane. The...

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Abstract

The invention provides a metal organic framework / carbon nanofiber composite membrane material and a preparation method thereof. The metal organic framework / carbon nanofiber composite membrane material is characterized by comprising a carbon nanofiber membrane, wherein a metal organic framework layer is grown on the nanofiber surface of the carbon nanofiber membrane. The preparation method comprises the following steps: first preparing a flexible carbon nanofiber membrane, oxidizing the flexible carbon nanofiber membrane by using nitric acid to form a carboxyl group-containing flexible carbon nanofiber membrane, putting the carboxyl group-containing flexible carbon nanofiber membrane into a precursor solution of a metal organic framework to grow the metal organic framework to obtain the metal organic framework / carbon nanofiber composite membrane material. The metal organic framework / carbon nanofiber composite membrane material prepared according to the preparation method provided by the invention has a great application potential in the fields of gas adsorption and separation, catalysts, sensors, electrode materials and the like.

Description

technical field [0001] The invention relates to a metal organic framework / carbon nanofiber composite membrane material and a preparation method thereof, in particular to a metal organic framework / electrospun carbon nanofiber flexible composite membrane material and a preparation method thereof. Background technique [0002] Metal-Organic Frameworks (Metal-Organic Frameworks) referred to as MOFs, is a new type of porous material with a periodic grid structure formed by the coordination of metal ions or metal atom clusters with organic ligands. performance. Due to the advantages of adjustable porous structure, huge specific surface area, ultra-high porosity, unsaturated metal sites, diversity of framework structure and diversity of ligand structure, metal-organic frameworks are widely used in gas adsorption and separation, gas Applications such as storage, catalytic reaction, and optoelectronics have shown great application potential, and have become the focus of researchers'...

Claims

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Application Information

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IPC IPC(8): D06M11/64D06M15/37D04H1/728B01D53/02D06M101/40
CPCB01D53/02B01D2257/504B01D2259/4009D04H1/728D06M11/64D06M15/37D06M2101/40Y02C20/40
Inventor 王先锋张宇菲丁彬俞建勇
Owner DONGHUA UNIV
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