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Chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and preparation method thereof

A fiber membrane and organic framework technology, which is applied in the field of chemical warfare agent self-disinfection metal-organic framework fiber membrane and its preparation, can solve the limitation of the amount of metal-organic framework added, affect the effect of catalysis, cannot make macroscopic forms, etc. problems, achieving excellent catalytic properties, short half-life, favorable transport and exposure of catalytic sites

Pending Publication Date: 2018-07-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradation agent has good catalytic degradation performance for HD, but the agglomeration of the powder catalyst during the catalysis process will affect the effect of subsequent catalysis
At present, metal-organic framework materials are mostly powder materials. Due to the limitation of the shape of powder materials, they cannot be made into easy-to-use macroscopic forms by themselves, which limits their use in practical applications; Although the formed composite material can solve the shape problem macroscopically, the amount of metal-organic framework added is limited to a certain extent. Therefore, it is necessary to develop self-supporting and flexible metal-organic framework fiber membrane materials for self-sterilizing chemical warfare agents. very necessary

Method used

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  • Chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and preparation method thereof
  • Chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and preparation method thereof
  • Chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for preparing a chemical warfare agent self-sterilizing metal-organic framework UiO-66 fiber filter membrane, comprising the following steps:

[0055] (1) Preparation of spinning solution

[0056] Add 0.3g of PVPK-90 to 5mL of absolute ethanol and stir, add 10g of zirconium acetate aqueous solution with a mass concentration of 20-25% to the mixed solution, and stir at room temperature to obtain a spinning solution;

[0057] (2) ZrO 2 Preparation of fiber membrane

[0058] Electrospinning the spinning solution obtained in step (1), the conditions are: spinning voltage 20kV, electrode distance 250mm, temperature 25°C, relative humidity 20%, to obtain ZrO 2 fiber membrane precursor; the resulting ZrO 2 The fiber film precursor is calcined at 500°C for 2 hours to obtain it.

[0059] (3) Preparation of UiO-66 fiber membrane

[0060] 0.1g ZrO 2 Fiber film, 1ml 99wt% glacial acetic acid, 10g terephthalic acid aqueous solution (5wt%) were added to a 50mL reactor ...

Embodiment 2

[0067] A kind of preparation method of chemical warfare agent self-sterilizing metal-organic framework UiO-67 fiber membrane, as described in Example 1, the difference is:

[0068] In step (3), the organic ligand solution is 10 g of an aqueous solution of diphthalic acid with a concentration of 10 wt%.

[0069] The scanning electron microscope picture of the UiO-67 fiber membrane that the present embodiment makes is as Figure 6 shown by Figure 6 It can be seen that the fiber filter membrane prepared in this example is composed of fibers composed of needle-like nanosheets, and the fiber diameter is about 2 μm.

[0070] The X-ray diffraction spectrogram of the UiO-67 fiber filter membrane that present embodiment makes is as Figure 7 shown by Figure 7 It can be seen that the UiO-67 fiber filter membrane was successfully prepared in this example.

[0071] The thermogravimetric analysis curve of the UiO-67 fiber filter membrane that present embodiment makes is as Figure 8...

Embodiment 3

[0075] A self-sterilizing metal-organic framework UiO-66-NH as a chemical warfare agent 2 The preparation method of fiber membrane, as described in embodiment 1, difference is:

[0076] In step (3), the organic ligand solution is an aqueous solution of 10 g of aminoterephthalic acid with a concentration of 10 wt%.

[0077] The UiO-66-NH that present embodiment makes 2 Scanning electron microscope images of fiber filters Figure 11 shown by Figure 11 It can be seen that the fiber filter membrane prepared in this example is composed of fibers composed of spherical nanoparticles, and the fiber diameter is about 2 μm.

[0078] The UiO-66-NH that present embodiment makes 2 The X-ray diffraction spectrum of the fiber filter membrane is as follows Figure 12 shown by Figure 12 It can be seen that this example successfully prepared UiO-66-NH 2 fiber membrane.

[0079] The UiO-66-NH that present embodiment makes 2 The thermogravimetric analysis curve of the fiber filter memb...

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Abstract

The invention provides a chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and a preparation method thereof. The preparation method comprises the following steps of performing electrostatic spinning calcining to prepare a zirconium oxide fiber film; mixing with a corresponding organic ligand and an activated acid solution, and performing hydrothermal reaction, so as to obtain the self-disinfection MOF fiber filtering membrane. The prepared self-disinfection MOF fiber filtering membrane has the advantages that the additional support material is notneeded, the self ultra-large specific surface area of MOFs is maintained, and the adsorption capacity and catalytic property are excellent; by adopting the micro-nano multi-stage structure, the reaction matter is favorably transmitted, the catalytic sites are exposed, and the agglomeration of the catalyst is avoided; the excellent self-disinfection property is realized; the degrading conversion rate of a simulating matter of a chemical warfare agent is high, the half-life period is short, and the stability in cyclic use is good; by adopting the thin film form, the self-disinfection MOF fiber filtering membrane can be directly applied into the actual filtering protection device.

Description

technical field [0001] The invention relates to a chemical warfare agent self-sterilizing metal-organic framework fiber filter membrane and a preparation method thereof, belonging to the technical field of nanomaterial preparation. Background technique [0002] Chemical Warfare Agents (Chemical Warfare Agents), such as sarin, soman, etc., are highly toxic and pose serious threats to humans and the environment no matter they are released accidentally or intentionally. The filter membranes or filter devices used to remove conventional chemical warfare agents mainly rely on activated carbon and its impregnated form, but they have the problem of secondary pollution, low long-term filtration capacity, and require additional final treatment. Therefore, the development of new self-detoxifying filters is extremely necessary to establish more effective protection against the hazards of lethal chemical warfare agents. [0003] At present, domestic research mainly focuses on the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D67/00
Inventor 李澄梁慧芯焦秀玲陈代荣
Owner SHANDONG UNIV
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