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Coordination polymer membrane material, preparation method for same and application of same in membrane separation

A coordination polymer and membrane material technology, applied in the separation of optically active compounds, separation/purification of carboxylic acid compounds, separation/purification of hydroxyl compounds, etc., can solve the problems of complex preparation process and less separation of organic liquids

Inactive Publication Date: 2012-10-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the field of membrane separation, some polymer membrane materials have been used for the separation of chiral isomers in the past, but the preparation process is relatively complicated, and the polymer membrane materials may react with the separated compounds, which limits its application
Although coordination polymer membranes have been extensively studied for the separation of different gases, very few studies have been done for the separation of organic liquids.

Method used

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  • Coordination polymer membrane material, preparation method for same and application of same in membrane separation
  • Coordination polymer membrane material, preparation method for same and application of same in membrane separation
  • Coordination polymer membrane material, preparation method for same and application of same in membrane separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1, pretreatment of the carrier:

[0047] Press 3 layers of 180-mesh nickel mesh (Henan Xinxiang 504 Factory) into a nickel mesh sheet at 20MPa on a hydraulic press, then put the pressed nickel mesh sheet into a 50ml beaker, add 20ml deionized water and 0.1g washing detergent (Liby detergent), ultrasonic for 30 minutes; then take out the nickel mesh and put it into a 50ml beaker, add 30ml of deionized water, ultrasonic treatment for 15 minutes and pour off the liquid in the beaker; repeat the deionized water ultrasonic cleaning step 5 times; finally take out the nickel mesh and put it into an oven at 100°C to dry for 5 hours, so as to obtain the cleaned nickel mesh carrier.

[0048] Step 2. In situ growth:

[0049] Add 0.1g of L-asp and 0.058g of bpy in a 20ml beaker, add 0.1ml of water and 1ml of methanol, stir well to get the reaction mother liquor, then transfer the reaction mother liquor to the reaction of stainless steel shell and polytetrafluoroethylene linin...

Embodiment 2

[0058] Step 1, pretreatment of the carrier:

[0059] Put a single-layer nickel mesh (180 mesh, Henan Xinxiang 504 Factory) into a 50ml beaker, add 20ml deionized water and detergent, and sonicate for 30 minutes. After taking it out, put it into a 50ml beaker, add 30ml of deionized water, perform ultrasonic treatment for 15 minutes, pour off the liquid in the beaker, and repeat the steps of ultrasonic cleaning with deionized water 5 times. After taking it out, put it into an oven at 100° C. to dry for 5 hours to obtain a cleaned single-layer nickel mesh carrier.

[0060] Step 2. In situ seed growth:

[0061] Add 0.1g of L-asp and 0.058g of bpy into a 20ml beaker, add 0.1ml of water and 1ml of methanol, stir well, transfer to a stainless steel shell, polytetrafluoroethylene-lined reactor, and complete the previous step Put the single-layer nickel mesh carrier horizontally into the reaction mother liquor, tighten the lid of the kettle, put it in a 150°C oven for in-situ growth ...

Embodiment 3

[0074] Step 1, step 2 and step 3 are the same as embodiment 2.

[0075] Step 4, secondary growth:

[0076] In a 20ml beaker, add Ni(L-asp)(H with a mass ratio of 0.219g 2 O) 2 , 0.156g of bpy, 6ml of water and 6ml of methanol, after stirring evenly, transfer to a reaction kettle lined with polytetrafluoroethylene with a stainless steel shell, and the previously synthesized surface has coordination polymerization Ni 2 (L-asp) 2 The nickel mesh carrier of the bpy seed crystal was placed vertically into the reaction mother liquor, and after tightening the lid of the kettle, it was placed in an oven at 150°C for in-situ growth for 2 days, and after taking it out, it was cooled to room temperature, and the secondary grown coordination polymer Ni was taken out 2 (L-asp) 2 bpy film.

[0077] Step 5, activation of membrane material:

[0078] Put the synthesized membrane material in an oven at 150°C for 10 hours, then take it out and cool it down to room temperature naturally to ...

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Abstract

The invention specifically relates to a coordination polymer membrane material, a preparation method for the same and application of the same in separation of mixed gas or chiral isomers, belonging to the field of membrane materials and separation technology thereof. The referred coordination polymer Ni2(L-asp)2bpy membrane material is a three-dimensional porous material which is formed by coordination between metallic nickel ions and L-aspartic acid (L-asp) and 4,4-bipyridine (bpy) and has a uniform pore channel size, wherein metallic nickel coordinates with oxygen atoms of L-aspartic acid to form a layer which is then propped up by a nitrogen atom coordination column in 4,4-bipyridine to form a three-dimensional skeleton structure. According to the invention, through selection of different carriers and carrier pretreatment methods, the coordination polymer membrane material is prepared by using an in situ or secondary growth method under different solvothermal conditions. Results show that the membrane material provided in the invention has a good separation effect on mixed gas or chiral isomers.

Description

technical field [0001] The invention belongs to the technical field of membrane materials and separation thereof, and in particular relates to a coordination polymer membrane material, a preparation method and the application of the membrane material in the separation of mixed gas or chiral isomers. Background technique [0002] Coordination polymers generally refer to metal-organic framework crystal materials with periodic network structures formed by small molecule ligands and metal ions through a self-assembly process. This type of material is not only different from general organic polymers, but also different from Si-O inorganic polymers. It not only has a crystal structure similar to zeolite molecular sieves, but also can be obtained through directional design of topology and expansion of organic functional groups. Channels and holes of different sizes have unique optical, electrical, magnetic and other properties. As a new molecular functional material, it spans many...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00C07B57/00C07C29/76C07C31/20C07C51/47C07C55/10
Inventor 薛铭康子曦范黎黎栗焕裘式纶
Owner JILIN UNIV
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