A preparation method of flexible composite materials with macro-quantification and high-efficiency loaded MOFs

A composite material and flexible substrate technology, applied in flat products, other household appliances, coatings, etc., can solve the problems of difficult and quantitative production of MOFs/flexible composite materials, low MOFs loading, and poor environmental friendliness. Good industrial application prospect, low cost and short time-consuming effect

Active Publication Date: 2021-06-01
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing preparation methods of MOFs / flexible composites (such as solvothermal method, secondary growth method, layer deposition method, etc.) need to use a large amount of organic solvents, and the preparation time is long (24h~72h), and the loading capacity of MOFs is low. , there are defects of high cost, long time-consuming, low efficiency, and poor environmental friendliness, and the prepared MOFs / flexible composite materials are difficult to produce macroscopically

Method used

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  • A preparation method of flexible composite materials with macro-quantification and high-efficiency loaded MOFs
  • A preparation method of flexible composite materials with macro-quantification and high-efficiency loaded MOFs
  • A preparation method of flexible composite materials with macro-quantification and high-efficiency loaded MOFs

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Experimental program
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Effect test

Embodiment 1

[0031] Preparation of MOF-808 / PP Composite by Hot Pressing with Trifluoroacetic Acid

[0032] 1) Prepare a commercially available polypropylene (PP) fabric, rinse it with NaOH aqueous solution to remove impurities and dust on the surface of the fabric, and then dry it at 50°C for use.

[0033] 2) Prepare the corresponding metal salt ZrOCl of MOF-808 2 ·8H 2 O (0.64g) and organic ligand H 3 BTC (0.44g) and polyethylene glycol (0.8mL, Mn=200) were thoroughly ground and mixed in an agate mortar. Add 0.2 mL of trifluoroacetic acid into the mortar, continue to grind and mix well. The mixture was uniformly coated on a PP film (20cm×20cm), wrapped with aluminum foil, and hot pressed using a hot press at a temperature of 200°C for 15 minutes. After the hot pressing, the MOF-808 / PP nanofiber composite membrane material was taken out from the aluminum foil, rinsed three times with 10 mL deionized water and 10 mL acetone, and dried at 80 °C for 4 h.

[0034] Such as figure 2 As sh...

Embodiment 2

[0037] 1) Weigh 2.0g PET and add it into a black cap bottle filled with 10mL DMF to make a spinning solution, and stir it magnetically for 8 hours to make it evenly mixed. The mixed spinning solution was placed in a syringe equipped with a 23# flat needle, at room temperature, the voltage was 18kV, and the flow rate was 1.5mL / h to prepare a nanofiber film and receive it with aluminum foil. The distance between the spinneret and the receiver is 20 cm. The prepared PET nanofiber film was dried in a vacuum oven at 50° C. for 6 hours, and then taken out for use. The diameter of the prepared PET film was about 300 nm to 500 nm.

[0038] 2) UiO-66-NH will be prepared 2 The corresponding metal salt ZrCl 4 (0.24g) and the organic ligand BDCA-NH 2 (0.20g) and polyethylene glycol (0.2g, Mn=4000) were placed in an agate mortar and thoroughly ground and mixed uniformly.

[0039] 3) Dilute trifluoroacetic acid: acetone according to the volume ratio of 1:10, put it into a spray gun, and...

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Abstract

The invention discloses a method for preparing a flexible composite material loaded with macro-quantified and highly efficient MOFs, which belongs to the technical field of composite materials. Metal-organic frameworks (MOFs) are effectively combined with nano-, micro-nano, or micro-scale textiles by thermocompression. With the support of flexible substrates for MOFs materials, the problem of agglomeration of MOFs itself due to powder properties and the limited application of powders are reduced; by introducing trifluoroacetic acid into the system, the self-assembly process of MOFs produces More MOFs with metal cluster defects and ligand defects expose more active groups on the surface of flexible materials, which enhances the combination of MOFs and flexible materials, making the combination of MOFs and flexible materials stronger and less prone to falling off. The MOFs / flexible composite material prepared by the invention has the characteristics of uniform fiber size, high loading capacity of MOFs, and good mechanical properties of the membrane. The method of the invention is low in cost, simple in process, short in time consumption, strong in environmental protection, capable of macro-scale production, and has good industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a macroscopically efficient flexible composite material loaded with MOFs. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous crystalline materials formed by self-assembly of metal ions and organic ligands, with adjustable pore size, high porosity and high specific surface area. At the same time, by adding additional groups to organic ligands, the hydrophilicity, hydrophobicity, stability, and catalytic activity of MOFs can be changed, which makes MOFs have high application potential in the fields of gas storage, separation, sensing, drug loading, and catalysis. . However, the powder of MOFs is difficult to use alone and easily causes secondary pollution, which limits the practical application value and scope of MOFs. [0003] The development and application of flexible materials is a hot research direction at p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01C08G83/00D06N3/12
CPCB29D7/01C08G83/008D06N3/12D06N2201/02D06N2201/0254D06N2203/06
Inventor 李从举孙亚昕张秀玲
Owner UNIV OF SCI & TECH BEIJING
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