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Method for preparing UiO-66 composite membrane material

A technology of uio-66 and composite membranes, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of poor dispersion of MOFs membranes and poor stability of MOFs materials, and improve water stability and anti-pollution performance Good, strong pressure resistance effect

Inactive Publication Date: 2018-11-13
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor dispersibility of MOFs membrane and poor stability of MOFs material in water, the invention provides a preparation method of UiO-66 composite membrane material. The choice of UiO-66 in the present invention can effectively improve the water stability of the membrane, and then Coating UiO-66 with PDA can effectively solve the dispersion problem of MOFs materials; therefore, the synthesized MOFs composite membrane material has the advantages of high water flux, good anti-pollution performance, and strong pressure resistance.

Method used

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  • Method for preparing UiO-66 composite membrane material

Examples

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Effect test

Embodiment 1

[0023] Example 1: The preparation method of the UiO-66 composite membrane material, the specific steps are:

[0024] (1) Dissolve zirconium tetrachloride and terephthalic acid in a mixture of N,N'-dimethylformamide and glacial acetic acid (the volume ratio of N,N'-dimethylformamide and glacial acetic acid is 5:4), ultrasonically stir at 25°C for 10min to obtain a mixed solution; transfer the mixed solution into the reaction kettle and react at 120°C for 12h; after the reaction kettle is cooled to room temperature, filter to obtain powder; use N, N'in turn -Wash three times with dimethylformamide and acetone, then three times with methanol, filter and vacuum dry at 100°C for 12h to obtain metal organic framework material UiO-66, in which the molar ratio of zirconium tetrachloride and terephthalic acid is 1 :2;

[0025] (2) Disperse the metal organic framework material UiO-66 in step (1) Tris buffer solution with pH=8.5, sonicate, then add dopamine, stir at room temperature for 24 h...

Embodiment 2

[0027] Embodiment 2: The preparation method of the UiO-66 composite membrane material, the specific steps are:

[0028] (1) Dissolve zirconium tetrachloride and terephthalic acid in a mixture of N,N'-dimethylformamide and glacial acetic acid (the volume ratio of N,N'-dimethylformamide and glacial acetic acid is 3:4) Stir ultrasonically at 30°C for 30min to obtain a mixed solution; transfer the mixed solution to the reaction kettle and react at 120°C for 24h; after the reaction kettle is cooled to room temperature, filter to obtain powder; use N, N'in turn for the powder -Wash three times with dimethylformamide and acetone, then three times with methanol. After filtration, dry under vacuum at 70°C for 18 hours to obtain metal organic framework material UiO-66, in which the molar ratio of zirconium tetrachloride and terephthalic acid is 1 :3;

[0029] (2) Disperse the metal-organic framework material UiO-66 in step (1) Tris buffer solution with pH=8, oscillate ultrasonically, then a...

Embodiment 3

[0031] Embodiment 3: The preparation method of the UiO-66 composite membrane material, the specific steps are:

[0032] (1) Dissolve zirconium tetrachloride and terephthalic acid in a mixture of N,N'-dimethylformamide and glacial acetic acid (the volume ratio of N,N'-dimethylformamide and glacial acetic acid is 6:4) Ultrasonic stirring at 25°C for 25min to obtain a mixed solution; transfer the mixed solution into the reaction kettle and react at 110°C for 18h; after the reaction kettle is cooled to room temperature, filter to obtain powder; use N, N'sequentially -Wash three times with dimethylformamide and acetone, then three times with methanol. After filtration, dry under vacuum at 80°C for 18 hours to obtain metal organic framework material UiO-66, in which the molar ratio of zirconium tetrachloride and terephthalic acid is 1 :4;

[0033] (2) Disperse the metal-organic framework material UiO-66 in step (1) in Tris buffer solution with pH=8.2, oscillate ultrasonically, then add ...

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Abstract

The invention discloses a method for preparing a UiO-66 composite membrane material and belongs to the technical field of composite membrane materials. By adopting the method, UiO-66 is coated with polydopamine, so that high compatibility can be achieved for MOFs (Metal organic Frameworks) and polymers. The method comprises the following steps: coating UiO-66 with polydopamine, dispersing a polydopamine coated MOF material into N,N-dimethylacetamide, carrying out ultrasonic treatment, preparing a casting membraneliquid of polyvinylidene fluoride, centrifuging and defoaming the casting membraneliquid, scraping films on a glass plate, and carrying out phase conversion in an N,N-dimethyl acetamide solution, thereby obtaining membranes. By adopting the method, an ultrafiltration flat membranematerial of polyvinylidene fluoride is prepared from UiO66, and the composite membrane material has the advantages of being high in water flux, high in pollution resistance, high pressure resistance,and the like.

Description

Technical field [0001] The invention discloses a preparation method of a UiO-66 composite membrane material, in particular a preparation method of a UiO-66 / PVDF composite membrane material, belonging to the technical field of composite membrane materials. Background technique [0002] Membrane technology is a new type of high-efficiency separation technology, which is considered to be one of the common supporting technologies to solve major problems in the current water resources, environment, energy, health and other fields. Compared with traditional separation technology, membrane separation method has the advantages of high separation efficiency, low energy consumption, small footprint, simple process, convenient operation, no pollution to the environment and easy integration with other technologies. It is widely used in water treatment and air In the separation process of treatment, industrial separation, medical and health, food and beverage purification, lithium-ion battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D71/02B01D69/12B01D69/02B01D67/00B01D61/14
CPCB01D61/145B01D67/0002B01D69/02B01D69/12B01D71/06B01D71/34B01D2325/24
Inventor 汤立红周玲玲宁平李凯金旭张秀英
Owner KUNMING UNIV OF SCI & TECH
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