Method for synthesizing metal organic skeleton composite film under action of assisted deposition of catechol compounds

A technology of metal-organic framework and synthesis method, which is applied in the field of catechol compound-assisted deposition to synthesize metal-organic framework composite membranes, can solve the problems of limiting the use types of organic basement membranes, achieve good application value and prospects, and have wide versatility Effect

Active Publication Date: 2019-04-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic membranes are often used as composite substrates due to their low cost and chemical modification characteristics. However, it is precisely because of their chemical modification and stability that often limit the use of organic substrate membranes.

Method used

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  • Method for synthesizing metal organic skeleton composite film under action of assisted deposition of catechol compounds
  • Method for synthesizing metal organic skeleton composite film under action of assisted deposition of catechol compounds
  • Method for synthesizing metal organic skeleton composite film under action of assisted deposition of catechol compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: The substrate is a polyethersulfone hollow fiber membrane, and the metal-organic framework membrane synthesized is a polyethersulfone / ZIF-8 membrane by using a modification method of polyvinylamine and levodopa-assisted deposition.

[0035] Preparation:

[0036] (1) Modification of polyethersulfone hollow fiber membranes: the substrate is polyethersulfone hollow fiber membranes, and the modification method using polyvinylamine and levodopa-assisted deposition, polyvinylamine (0.15g) and levodopa (0.05 g) Add to Tris-HCl buffer solution (25mL, pH=8.5), put the polyethersulfone hollow fiber membrane sealed at both ends and vibrate at 100r / min for 6h. Take out the film, blow off the excess liquid attached to the surface of the film with airflow, support it with a self-made support and put it in an oven to dry for use.

[0037] (2) Synthesis of polyethersulfone / ZIF-8 membrane: put the modified polyethersulfone hollow fiber membrane obtained in step (1) into the ...

Embodiment 2

[0039] Example 2: The substrate is a polyethersulfone hollow fiber membrane, tannic acid is used as a modifier, and the synthesized metal-organic framework membrane is a polyethersulfone / ZIF-8 membrane.

[0040](1) Modification of polyethersulfone hollow fiber membranes: tannic acid (0.5mg / mL) and zinc acetate (0.3mg / mL) aqueous solutions were prepared by tannic acid complexed metal ion deposition method to adjust the tannic acid Solution pH=8. The polyethersulfone hollow fiber membrane was repeatedly immersed in the above two solutions, and the solution was continuously shaken for 30 seconds, repeated 7 times. After the membrane was taken out, it was rinsed several times with deionized water and left to dry in the air.

[0041] (2) Synthesis of polyethersulfone / ZIF-8 membrane: put the modified polyethersulfone hollow fiber membrane obtained in step (1) into the prepared MOF precursor solution, and perform solvothermal synthesis at 85°C for 24h, After the reaction system was...

Embodiment 3

[0043] Example 3: The substrate is α-Al 2 o 3 Porous flat membrane, tannic acid as modifier, synthesized metal-organic framework membrane as α-Al 2 o 3 / CuBTC film.

[0044] Preparation:

[0045] (1) Preparation of polysulfone flat membrane containing copper gel: the substrate was modified by tannic acid complexed metal ion deposition method, and tannic acid (1.0 g) and copper sulfate (0.1 g) were added to deionized water ( 50mL), the pH was adjusted to be greater than 7, and the α-Al 2 o 3 One side of the porous flat membrane was immersed in the above solution for 1 h. After the membrane was taken out, it was rinsed several times with deionized water and left to dry in the air.

[0046] (2)α-Al 2 o 3 / CuBTC film synthesis: the modified α-Al obtained in step (1) 2 o 3 The flat film was put into the prepared MOF precursor solution, and the solvothermal synthesis was carried out at 110 °C for 18 hours. After the reaction system was cooled, the film was taken out and r...

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Abstract

The invention provides a method for synthesizing a metal organic skeleton composite film. The method comprises the steps: adopting catechol compounds firstly to assist deposition and modify the surface of a substrate so as to provide more heterogeneous nucleation sites for synthesis of the metal organic skeleton material, and then synthesizing the continuous and dense metal organic skeleton composite film under certain conditions. The method has wide versatility, can be applied to substrates of multiple materials and configurations, can be applied to synthesis of multiple types of metal organic skeleton composite films, and has a good application value and prospect.

Description

(1) Technical field [0001] The invention relates to a method for synthesizing a metal-organic framework membrane, in particular to a method for synthesizing a metal-organic framework composite membrane by assisted deposition of catechol compounds. (2) Background technology [0002] Since Leob and Sourirajan prepared the first long acetate separation membrane in the last century, membrane science has entered a stage of rapid development. In 1980, Permea successfully developed and produced Prism membrane and used it for hydrogen separation. This is the world's first gas separation membrane for large-scale industrial applications. Since then, membrane-based gas separation has grown into a $150 million per year business with the potential for substantial growth in the near future. my country's membrane separation technology started from the study of ion exchange membranes in 1958, while the research on gas separation membrane technology began in the 1980s. [0003] Compared w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/06B01D71/10B01D71/26B01D71/34B01D71/38B01D71/42B01D71/56B01D71/68
CPCB01D67/0002B01D67/0079B01D69/12B01D71/022B01D71/024B01D71/025B01D71/06B01D71/10B01D71/26B01D71/34B01D71/38B01D71/42B01D71/56B01D71/68
Inventor 张国亮唐凯杰孟琴
Owner ZHEJIANG UNIV OF TECH
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