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Papyraceous gradient microfiber composite metal organic framework material as well as preparation method and application thereof

A technology of composite metal and organic framework, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of discontinuous MOFs film, easy separation of crystal and carrier, and difficult to cut and fold the carrier, and achieve chemical stability and heat transfer. Good performance, adjustable mechanical strength, adjustable porosity

Active Publication Date: 2018-12-11
SOUTH CHINA UNIV OF TECH
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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 paper-like MOFs film for the discontinuous growth of the MOFs film on the carrier, the degree of defect is large, the film is thicker, the crystal is easy to separate from the carrier, the carrier is not easy to cut and fold, and the heat and mass transfer efficiency is low. Preparation method of microfiber composite MOFs membrane (paper-like gradient microfiber composite metal organic framework material)

Method used

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  • Papyraceous gradient microfiber composite metal organic framework material as well as preparation method and application thereof
  • Papyraceous gradient microfiber composite metal organic framework material as well as preparation method and application thereof
  • Papyraceous gradient microfiber composite metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of paper-like sintered stainless steel fiber carrier:

[0033] Add 6g of stainless steel fiber and 3g of coniferous wood fiber into the water, and stir at high speed for 10 minutes in a fiber standard dissociator to form a uniform slurry, in which the diameter of the stainless steel fiber is 6.5 μm, fry the evenly mixed slurry with a slicer, After filtering, a wet filter cake is formed, the filter cake is pressed, dried at 105°C for 2h, and the dried stainless steel fiber carrier precursor is sintered at 1050°C for 40min under nitrogen protection gas with a flow rate of 2000mL / min. Prepared paper-like sintered stainless steel fiber carrier (thickness is 2mm);

[0034] (2) Modification of paper-like sintered stainless steel fiber carrier:

[0035] Cut the paper-like sintered stainless steel fiber carrier (PSSF) into a rectangle of 4cm*5cm, sonicate 3 times with deionized water, 5 minutes each time, and 3 times with absolute ethanol, 5 minutes each time; ...

Embodiment 2

[0046] Except following difference, all the other are with embodiment 1:

[0047] The quality of 2-methylimidazole in step (3) is 0.5747g.

Embodiment 3

[0049] Except following difference, all the other are with embodiment 1:

[0050] The reaction time in step (3) is 24h.

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Abstract

The invention belongs to the technical field of composite materials, and discloses a papyraceous gradient microfiber composite metal organic framework material as well as a preparation method and application thereof. The method comprises the following steps: (1) preparing a papyraceous sintered fiber carrier; (2) pretreating the papyraceous sintered fiber carrier by adopting aminopropyltriethoxysilane to obtain a pretreated papyraceous sintered fiber carrier; (3) growing and depositing MOFs crystals on the surface of the pretreated papyraceous sintered fiber carrier; and (4) growing an MOFs film on the papyraceous sintered fiber carrier subjected to crystal deposition. According to the preparation method, the MOFs continuously grow on the surface of the papyraceous sintered fiber carrier without defects to form the compact MOFs film, so the cost is low, and the film has a relatively small and adjustable thickness, high adjustable porosity and high mechanical strength; when the film isapplied to a fixed bed, mass transfer and heat transfer can be enhanced, and a bed pressure drop can be decreased; and the papyraceous gradient microfiber composite metal organic framework material has a wider application prospect in the field of catalysis and adsorption.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a metal-organic framework membrane composite material, in particular to a paper-like gradient microfiber composite metal-organic framework material (hereinafter referred to as MOFs) and its preparation method and application. The paper-like gradient microfiber composite metal organic framework material is applied in the fields of adsorption, separation and catalysis. Background technique [0002] MOFs are formed by combining metal ions or metal clusters with some organic ligands through coordination bonds. Due to the different metal ions (metal clusters) or organic ligands that make up MOFs, they can exhibit a variety of topologies. structure. MOFs are made into membranes, that is, MOFs membranes. Because MOFs themselves have many advantages: adjustable pore size, ultra-high specific surface area, and exposed metal sites, MOFs membranes can be used in adsorption, separ...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22
CPCB01J20/226C08G83/008
Inventor 张会平彭洁鄢瑛
Owner SOUTH CHINA UNIV OF TECH
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