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Mixed matrix membrane based on intercalated montmorillonite/Cu3 (BTC) 2 composite material as well as preparation method and application of mixed matrix membrane

A technology of mixed matrix membranes and composite materials, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of small layer spacing and inability to fully utilize gas transmission channels, and achieve faster transportation, high CO2 flux and Selective, delivery-enhancing effects

Active Publication Date: 2021-12-28
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of montmorillonite is tightly stacked and the interlayer spacing is small, so the gas transfer channels between layers cannot be fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of the mixed matrix membrane based on the intercalated montmorillonite / Cu3(BTC)2 composite material is as follows:

[0036] Step 1. Intercalated montmorillonite / Cu 3 (BTC) 2 Preparation of composite materials

[0037] Add montmorillonite to deionized water to prepare a dispersion liquid with a mass percentage of 1%. After ultrasonic dispersion for 30 min at a temperature of 25 °C, an ultrasonic frequency of 50 kHz, and an ultrasonic power of 480 W, an ultrasonic disperser was used. Then heated in a water bath at 80°C until dissolved to obtain a montmorillonite dispersion, which was named solution A; in solution A, Cu(NO 3 ) 2 ·3H 2 O, wherein the mass ratio of montmorillonite to copper nitrate trihydrate is 1:0.5, mechanically stirred at a temperature of 25 °C and a speed of 250 r / min for 2 h until the solution is uniformly mixed, and named solution B; Add formic acid into ethanol, stir mechanically at 25 °C and 300 r / min for 30 min until completely...

Embodiment 2

[0044] In situ synthesis of intercalated montmorillonite / Cu based interlayers of aminated montmorillonite 3 (BTC) 2 The preparation of the mixed matrix membrane of composite material, the steps are as follows:

[0045] Step 1. Intercalated montmorillonite / Cu 3 (BTC) 2 Preparation of composite materials

[0046] Add montmorillonite to deionized water to prepare a dispersion liquid with a mass percentage of 1%, and use an ultrasonic disperser to ultrasonically disperse for 30 min at a temperature of 25 °C, an ultrasonic frequency of 50 kHz, and an ultrasonic power of 480 W. Then heated in a water bath at 80°C until dissolved to obtain a montmorillonite dispersion, which was named solution A; in solution A, Cu(NO 3 ) 2 ·3H 2 O, wherein the mass ratio of montmorillonite and copper nitrate trihydrate is 1:0.5, and mechanically stirred for 2 h at a temperature of 25 °C and a rotational speed of 250 r / min until the solution is uniformly mixed, and named solution B; Add formic ...

Embodiment 3

[0053] In situ synthesis of intercalated montmorillonite / Cu based interlayers of aminated montmorillonite 3 (BTC) 2 The preparation of the mixed matrix membrane of composite material, the steps are as follows:

[0054] Step 1. Intercalated montmorillonite / Cu 3 (BTC) 2 Preparation of composite materials

[0055] Add montmorillonite to deionized water to prepare a dispersion liquid with a mass percentage of 1%. After ultrasonic dispersion for 30 min at a temperature of 25 °C, an ultrasonic frequency of 50 kHz, and an ultrasonic power of 480 W, an ultrasonic disperser was used. Then heated in a water bath at 80°C until dissolved to obtain a montmorillonite dispersion, which was named solution A; in solution A, Cu(NO 3 ) 2 ·3H 2 O, wherein the mass ratio of montmorillonite to copper nitrate trihydrate is 1:0.26, mechanically stirred for 2 h at a temperature of 25 °C and a rotational speed of 250 r / min until the solution is uniformly mixed, and named solution B; Add formic a...

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Abstract

The invention discloses a mixed matrix membrane based on an intercalated montmorillonite / Cu3 (BTC) 2 composite material as well as a preparation method and application of the mixed matrix membrane. According to the method, a metal organic framework material Cu3 (BTC) 2 is synthesized in situ in montmorillonite dispersion liquid, and then amination modification on montmorillonite is realized by adopting 3-aminopropyltriethoxysilane; the modified montmorillonite is added into a polyvinylamine solution to prepare a uniform membrane casting solution, the surface of a microfiltration membrane is coated with a layer of thin film,wherein the wet film of the thin film is 1-150 microns. According to the invention, the metal organic framework material Cu3 (BTC) 2 is inserted between the layers of montmorillonite, and the composite material is subjected to amination modification, so that a gas transmission and diffusion channel between the layers of the montmorillonite is regulated and controlled, and a large number of amino carriers are loaded; when the product is applied in mixed gas CO2 separation, more diffusion channels and more amino carriers capable of being subjected to reversible reaction with CO2 are provided for CO2 transmission, and higher CO2 flux and selectivity are achieved.

Description

technical field [0001] The present invention relates to a kind of based on intercalation type montmorillonite / Cu 3 (BTC) 2 The mixed matrix film of composite material and its preparation method and application, specifically relate to a kind of in-situ synthesis metal-organic framework material Cu 3 (BTC) 2 The invention discloses a method for preparing a mixed matrix membrane, belonging to the technical field of chemical engineering gas separation membranes. Background technique [0002] With the rapid development of industrialization, the increase of chemical plants leads to CO 2 The rapid increase in greenhouse gas emissions will endanger our health and threaten the ecological environment on which we depend. Therefore, capture and recovery of CO from fuel exhaust 2 has very important practical significance. In recent years, the separation and recovery of CO 2 There are many methods, among which gas separation membranes have attracted extensive attention of researche...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D71/02B01D69/02B01D67/00B01D53/02
CPCB01D71/06B01D71/02B01D69/02B01D67/0079B01D53/02B01D2257/504Y02C20/40
Inventor 王永洪张新儒李晋平
Owner TAIYUAN UNIV OF TECH
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