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Mixed matrix membrane of bead-like MOF filled silicone rubber

A technology of mixed matrix membrane and silicone rubber, applied in membrane, membrane technology, semi-permeable membrane separation, etc., can solve the problem of poor permeability and selectivity, difficult continuous MOFs transmission channel, and poor modification effect of MOFs blending modified membrane. It can reduce the dipole interaction and solve the problem of poor dispersion.

Active Publication Date: 2021-02-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor permeability and selectivity of traditional pervaporation separation membranes, poor modification effect of MOFs blended modified membranes prepared by conventional methods, low efficacy of additive MOFs, and difficulty in forming continuous MOFs transmission channels in the membrane problems, and provide a method for fabricating a mixed matrix membrane with beaded MOF filled with silicone rubber

Method used

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  • Mixed matrix membrane of bead-like MOF filled silicone rubber
  • Mixed matrix membrane of bead-like MOF filled silicone rubber
  • Mixed matrix membrane of bead-like MOF filled silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a mixed matrix membrane filled with PPy silicone rubber, the specific preparation steps are as follows:

[0041]1) Add 0.21 g of methyl orange into 250 mL of ultrapure water, and stir at 320 rpm for 1 hour to obtain solution 1. Then, 1.2 g of ferric chloride and 460 μL of pyrrole were added to solution 1 to obtain reaction solution 2. The reaction solution 2 was stirred and reacted in the dark at 320 rpm for 24 hours, and washed three times with ethanol and water respectively. Drying under vacuum at 60°C until constant weight is achieved to obtain polypyrrole nanotubes (PPy).

[0042] 2) Disperse 1 g of PPy obtained in step 1 in 100 g of n-heptane, stir for 1 hour, and treat in an ultrasonic ice bath for 30 minutes to obtain dispersion 7. Add 20 g of polydimethoxysiloxane, 4 g of ethyl orthosilicate and 2 g of dibutyltin dilaurate to the dispersion, and stir for 40 minutes to obtain dispersion 8.

[0043] 3) The dispersion liquid 8 was coated o...

Embodiment 2

[0045] A method for preparing a silicon rubber pervaporation membrane, the specific preparation steps are as follows:

[0046] 1) Add 20 g of polydimethoxysiloxane, 4 g of ethyl orthosilicate and 2 g of dibutyltin dilaurate into 100 g of n-heptane solution, and stir for 40 minutes to obtain solution 1.

[0047] 2) The solution 1 was coated on a polyvinylidene fluoride flat film using a flat film scraping machine, and left to stand in an air atmosphere for 24 hours, and then placed in a blast drying oven at 80° C. for 6 hours to obtain a PDMS film.

Embodiment 3

[0049] A method for preparing a mixed matrix membrane filled with beaded MOF filled with silicone rubber, the specific preparation steps are as follows:

[0050] 1) Add 0.21 g of methyl orange into 250 mL of ultrapure water, and stir at 320 rpm for 1 hour to obtain solution 1. Then, 1.2 g of ferric chloride and 460 μL of pyrrole were added to solution 1 to obtain reaction solution 2. The reaction solution 2 was stirred and reacted in the dark at 320 rpm for 24 hours, and washed three times with ethanol and water respectively. Drying under vacuum at 60°C until constant weight is achieved to obtain polypyrrole nanotubes (PPy).

[0051] 2) Disperse 0.4 g of PPy obtained in step 1 in 250 mL of methanol solution, and perform ultrasonic treatment for 30 minutes to obtain dispersion 3. 7.8 g of zinc nitrate hexahydrate was added to the dispersion 3, and ultrasonically assisted stirring was performed for 30 minutes to obtain the dispersion 4. 17.3 g of dimethylimidazole was dissolv...

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Abstract

The invention discloses a mixed matrix membrane of bead-like MOF filled silicone rubber. A preparation method of the mixed matrix membrane comprises the following steps of: firstly, respectively adding FeCl3 and pyrrole into an aqueous solution of MO, stirring for reaction, washing and drying to obtain PPy; then dispersing PPy in a methanol solution, and adding a ligand to obtain a dispersion liquid 1; dropwise adding a methanol solution of 2-MeIm into the dispersion liquid 1, stirring for reaction, washing and drying to obtain MOF / PPy; and dispersing MOF / PPy in a solvent, adding silicone rubber, a cross-linking agent and a catalyst, stirring for reaction, coating a flat sheet membrane with the obtained product, standing, and drying to obtain the target product. The mixed matrix membrane provided by the invention has excellent permeability and separation performance.

Description

technical field [0001] The invention relates to a mixed matrix membrane filled with silicon rubber with beaded MOF, belonging to the technical field of pervaporation membrane separation. Background technique [0002] Biofuel is considered as an important green renewable energy to replace traditional gasoline to solve global energy security and environmental problems. Among them, biobutanol as a biofuel is considered to be superior to bioethanol because of its lower vapor pressure under operating conditions (without major adjustments to existing industrial technologies) and higher heat consumption of combustion (compared to It is closer to traditional gasoline), has a weaker interaction with water (no need to consider water absorption), and is safer. However, the traditional biological fermentation process can only obtain a lower concentration of butanol aqueous solution due to the limitation of product inhibition. In addition, because butanol and water have close boiling p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/14B01D61/36B01D69/02B01D67/00
CPCB01D61/362B01D67/0011B01D69/02B01D69/141B01D2325/38
Inventor 赵之平徐李昊王涛毛恒
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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