Zeolite imidazate framework/polyamide composite membrane and preparation method thereof

A technology of zeolite imidazolate and polyamide, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as poor compatibility and uneven distribution of MOFs, and achieve improved gas separation performance, great development potential and industrial application Foreground, the effect of simple film making process

Active Publication Date: 2017-02-15
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These membranes have problems such as un...

Method used

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  • Zeolite imidazate framework/polyamide composite membrane and preparation method thereof
  • Zeolite imidazate framework/polyamide composite membrane and preparation method thereof
  • Zeolite imidazate framework/polyamide composite membrane and preparation method thereof

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Embodiment 1

[0036] Step 1: first dissolve two kinds of imidazoles of sodium formate 20mmol, 2-aminobenzimidazole 12mmol and 2-methylimidazole in total 68mmol in deionized water 200ml; dissolve zinc nitrate hexahydrate 20mmol in N,N-dimethylformaldehyde In 200ml of amide; the two solutions were mixed and reacted for 1h, and NH was obtained by centrifugation, washing and drying 2 -ZIF-8 nanocrystalline material, its XRD pattern and SEM pattern are detailed figure 1 and figure 2 .

[0037] Step 2: Put 0.3g NH 2 -ZIF-8 nanocrystalline material was dispersed in 100ml deionized water by ultrasonic, ultrasonic dispersion time was 3h; then 0.4g Na was added in turn 2 CO 3 and 0.5ml of DNMDAm, stirred until completely dissolved to obtain an aqueous solution; 0.3ml of trimesoyl chloride (TMC) was dissolved in 100ml of n-hexane, and stirred until completely dissolved to obtain an organic solution.

[0038] Step 3: Pour the organic phase solution obtained in Step 2 onto the silicone rubber memb...

Embodiment 2

[0051] Step 1: first dissolve two kinds of imidazoles of sodium formate 20mmol, 2-aminobenzimidazole 12mmol and 2-methylimidazole in total 68mmol in deionized water 200ml; dissolve zinc nitrate hexahydrate 20mmol in N,N-dimethylformaldehyde In 200ml of amide; the two solutions were mixed and reacted for 1h, and NH was obtained by centrifugation, washing and drying 2 - ZIF-8 nanocrystalline material.

[0052] Step 2: Combine 0.6g, 1g and 2g NH 2 -ZIF-8 nanocrystalline materials were dispersed in three parts of 100ml deionized water by ultrasonic respectively, the ultrasonic dispersion time was 3h; then 0.4g Na was added in turn 2 CO 3 and 0.5ml of DNMDAm into three parts of aqueous solutions, stirred until completely dissolved to obtain an aqueous solution; 0.3ml of trimesoyl chloride (TMC) was dissolved in 100ml of n-hexane, stirred until completely dissolved, to obtain an organic solution, and prepared 3 copies.

[0053] Step 3: Pour the three organic phase solutions obta...

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Abstract

The invention discloses a zeolite imidazate framework/polyamide composite membrane and a preparation method thereof. The preparation method comprises the following steps: dissolving sodium formate, 2-aminobenzimidazole and 2-methylimidazole into deionized water so as to obtain a mixed solution; dissolving zinc salt into N,N-dimethyl formamide so as to obtain a zinc salt solution; performing mixing reaction on the mixed solution and the zinc salt solution, and performing centrifugation, washing and drying so as to obtain an NH2-ZIF-8 nano material; and soaking a substrate membrane into an organic phase solution, pouring off an organic phase solution on the substrate membrane, naturally drying in air, soaking the substrate membrane into a water-phase solution, pouring off the water-phase solution on the substrate membrane, cleaning the surface of the substrate membrane with deionized water, and drying in air at room temperature, thereby obtaining an NH2-ZIF-8/polyamide composite membrane. The prepared NH2-ZIF-8/polyamide composite membrane is used for separating gases such as CO2, N2, H2, CH4 and NOx, and the permeability and the selectivity of the membrane can be improved.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to a zeolite imidazolate skeleton / polyamide composite membrane and a preparation method thereof. Background technique [0002] Our country and even the world are facing severe energy and environmental problems. The use of clean energy such as natural gas and biogas to replace traditional energy has received extensive attention, but newly collected natural gas and biogas usually contain CO 2 It affects the calorific value and thermal stability of clean energy, and has problems such as corrosion of pipes and equipment. Efficient removal of acid gases (mainly CO 2 ) to ensure the safe transportation and efficient utilization of clean energy, which is the key to realizing the large-scale application of clean energy. [0003] In recent years, membrane separation technology has been used more and more in industrial gas separation and purification. As a kind of membrane material, zeo...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00B01D71/56B01D71/68B01D71/34B01D53/22
CPCB01D53/228B01D67/0079B01D69/12B01D71/34B01D71/56B01D71/68Y02C20/40
Inventor 李诗纯余数温刘渝罗毅威曾泽华
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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