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A beaded MOF-filled mixed matrix membrane with silicone rubber

A technology of mixed matrix membrane and silicone rubber, applied in the direction of membrane, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor permeability and selectivity, difficult continuous MOFs transmission channel, low efficacy of additive MOFs, etc. Polar interaction, solve the effect of cumbersome preparation method and simple preparation method

Active Publication Date: 2021-11-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A beaded MOF-filled mixed matrix membrane with silicone rubber
  • A beaded MOF-filled mixed matrix membrane with silicone rubber
  • A beaded MOF-filled mixed matrix membrane with 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 filled with beaded MOF silicone rubber. The preparation method of the mixed matrix membrane is as follows: firstly FeCl 3 and pyrrole were added to the aqueous solution of MO, and after stirring and reacting, PPy was obtained after washing and drying; then PPy was dispersed in the methanol solution, and the ligand was added to obtain the dispersion 1; after that, the methanol solution of 2-MeIm was added dropwise to the dispersion In 1, after stirring and reacting, MOF / PPy is obtained after washing and drying; then MOF / PPy is dispersed in a solvent, and then silicone rubber, cross-linking agent and catalyst are added, and after stirring and reacting, it is coated on a flat film, and the After standing and drying, the target product was obtained. The mixed matrix membrane of the present 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 Patents(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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