Preparation method for flexible composite loaded with macro MOFs efficiently

A technology of composite materials and flexible substrates, which is applied in the direction of flat products, applications, coatings, etc., can solve the problems of difficult macro-production of MOFs/flexible composite materials, low loading of MOFs, poor environmental friendliness, etc., and achieve good industrial The effect of application prospect, low cost and short time consumption

Active Publication Date: 2020-06-05
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

Method used

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  • Preparation method for flexible composite loaded with macro MOFs efficiently
  • Preparation method for flexible composite loaded with macro MOFs efficiently
  • Preparation method for flexible composite loaded with macro MOFs efficiently

Examples

Experimental program
Comparison scheme
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 provides a preparation method for a flexible composite loaded with macro MOFs efficiently, and belongs to the technical field of composites. Metal-organic frameworks (MOFs) are combinedwith nano, micro-nano or micron textiles effectively through a hot pressing method. By means of the supporting function of a flexible substrate for the MOFs, the agglomeration problem of the MOFs dueto powder properties, and the problem of power application restriction are reduced; through introduction of trifluoroacetic acid into a system, more MOFs with metal cluster defects and ligand defectsare manufactured in the self-assembly process of the MOFs, and meanwhile more active groups are exposed to the surfaces of the flexible composite; and the combination between the MOFs and the flexiblecomposite is improved, so that the MOFs are combined with the flexible composite more securely, and are not liable to fall out. The MOFs/flexible composite prepared with the preparation method has the characteristics of uniform fiber size, high MOFs loading capacity and excellent mechanical property of films. The preparation method has the advantages of low cost, simple process, low time consumption, good environmental friendliness, capability of macro production, and wide industrial application prospect.

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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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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