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Nanometer composite fiber membrane and preparation method thereof

A technology of nanocomposite fibers and nanofiber membranes, applied in fiber types, fiber treatment, chemical instruments and methods, etc., can solve problems such as shedding and MOF particle loss, and achieve high production efficiency, improved adhesion, and no environmental pollution Effect

Active Publication Date: 2018-12-07
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The MOF-loaded polymer composite can be used in gas adsorption, gas filtration and other gas fields. However, when used in a solution system such as water, due to solvation, the MOF particles are easy to fall off from the surface of the polymer fiber and enter the solution system, resulting in MOF particle loss

Method used

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  • Nanometer composite fiber membrane and preparation method thereof
  • Nanometer composite fiber membrane and preparation method thereof

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preparation example Construction

[0019] A method for preparing a nanocomposite fiber membrane provided by an embodiment of the present invention comprises the following steps:

[0020] S1, dissolving the water-soluble divalent metal salt and the water-soluble trivalent metal salt in water, and then adding a precipitant to configure a metal salt mixed solution, wherein the molar ratio of the divalent metal salt to the trivalent metal salt 1~8:1;

[0021] S2, immersing the polymer nanofiber membrane in the metal salt mixed solution to obtain a mixture;

[0022] S3, heating the mixture, washing and drying to obtain a nanofibrous membrane loaded with layered double metal oxide;

[0023] S4, mixing the nanofiber membrane with the imidazole solution, heating and reacting to obtain a nanocomposite fiber membrane loaded with MOF particles.

[0024] In step S1, preferably, the molar ratio of the divalent metal salt to the trivalent metal salt is 2-4:1, more preferably, the molar ratio of the divalent metal salt to t...

Embodiment 1

[0040] A nanocomposite fiber membrane provided in this embodiment is prepared according to the following steps:

[0041] a. Add 2.91g (0.01mol) cobalt nitrate hexahydrate, 1.87g (0.005mol) aluminum nitrate nonahydrate, 2g urea and 150mL deionized water to the PTFE lining of the hydrothermal reactor; stir and dissolve to obtain metal Salt mixed solution;

[0042] b. Weigh 2g polyacrylonitrile nanofiber membrane, and soak it in the metal salt mixed aqueous solution in a for 0.5h;

[0043] c. Lock the hydrothermal reactor and place it at 120°C to react for 12 hours; after the reactor is cooled to room temperature, take out the polyacrylonitrile nanofiber membrane, wash with water and dry to obtain Co 3 Al-LDH loaded nanofibrous membrane;

[0044] d. Add 1g of Co to the PTFE lining of the hydrothermal reactor 3 Al-LDH-loaded nanofiber membrane, 0.5g 2-methylimidazole and 50mL methanol; lock the hydrothermal reactor and place it at 100°C for 12h; wait for the reactor to cool dow...

Embodiment 2

[0047] A nanocomposite fiber membrane provided in this embodiment is prepared according to the following steps:.

[0048] a. Add 2.97g (0.01mol) zinc nitrate hexahydrate, 1.87g (0.005mol) aluminum nitrate nonahydrate, 2g urea and 150mL deionized water to the PTFE lining of the hydrothermal reactor; stir and dissolve to obtain metal Salt mixed solution;

[0049] b. Weigh 2g polyimide nanofiber membrane, and soak it in a metal salt mixed aqueous solution for 0.5h;

[0050] c. Lock the hydrothermal reactor and place it in an oven at 110°C to react for 12 hours; after the reactor cools down to room temperature, take out the polyacrylonitrile nanofiber membrane, wash with water and dry to obtain ZnAl-LDH-loaded nanofiber Fiber membrane;

[0051] d: Add 1g ZnAl-LDH loaded nanofiber membrane, 0.5g 2-methylimidazole and 50mL methanol to the PTFE lining of the hydrothermal reactor; lock the hydrothermal reactor and place it at 100°C Reaction in an oven for 12 hours; after the reacto...

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Abstract

The invention provides a nanometer composite fiber membrane and a preparation method thereof and relates to the technical field of compounding. The preparation method comprises: dissolving a water-soluble divalent metal salt and a water-soluble trivalent metal salt in water, then adding a precipitating agent into the solution to obtain a metal salt mixed solution, immersing a polymer nanofiber membrane in the metal salt mixed solution to obtain a mixture, heating the mixture, carrying out washing and drying to obtain a layered double oxide-loading nanofiber membrane, mixing the nanofiber membrane and an imidazole solution, and heating the mixture for a reaction to obtain the nanometer composite fiber membrane loading MOF particles. The nanometer composite fiber membrane realizes effectiveadhesion of MOF particles on the nanofibers. The preparation method has simple processes, realizes a low cost, prevents pollution and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of composite materials, and in particular to a nanocomposite fiber membrane and a preparation method thereof. Background technique [0002] Metal-organic frameworks (MOFs) are hybrid polycrystalline materials formed by linking metals or metal clusters with organic ligands. MOF materials such as ZIF-8 and ZIF-67 have advantages in the fields of gas storage, molecular separation, heterogeneous catalysis, adsorption, etc. due to their large specific surface area, many unsaturated metal sites, adjustable structure, and good thermal stability. Wide application prospects. However, small MOF particles dispersed in water have disadvantages such as difficult separation and easy loss. Existing MOF composite materials usually generate MOF particles directly on polymer materials, and realize the loading of MOF particles on polymer composite materials through the weak force between MOF particles and the surface of poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37B01J20/22C02F1/28B01J20/30D06M101/30D06M101/28
CPCB01J20/226C02F1/285D06M15/37D06M2101/28D06M2101/30
Inventor 谢建达刘跃军康志泽林炳涵林海门
Owner XIAMEN UNIV OF TECH
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