Preparation method of polydimethylsiloxane-carbon nano tube composite membrane, composite membrane and method for separating and purifying butyl alcohol

A technology of polydimethylsiloxane film and polydimethylsiloxane, which is applied in the field of chemical engineering to achieve the effect of improving production, separation and purification efficiency, and reducing separation costs

Active Publication Date: 2014-06-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, there are no reports and related patents on the separation and purification of butanol using polydimethylsiloxane-carbon nanotube composite membranes

Method used

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  • Preparation method of polydimethylsiloxane-carbon nano tube composite membrane, composite membrane and method for separating and purifying butyl alcohol
  • Preparation method of polydimethylsiloxane-carbon nano tube composite membrane, composite membrane and method for separating and purifying butyl alcohol
  • Preparation method of polydimethylsiloxane-carbon nano tube composite membrane, composite membrane and method for separating and purifying butyl alcohol

Examples

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Effect test

Embodiment 1

[0051] Preparation of composite membrane with 2wt% carbon nanotubes added: polydimethylsiloxane and crosslinking agent were mixed at a ratio of 10:1 to obtain polydimethylsiloxane membrane liquid. Add 2wt% carbon nanotubes to the polydimethylsiloxane film solution, the length of the carbon nanotubes is 10 μm, the diameter is 11nm, and 10wt% n-pentane is added to make the carbon nanotubes uniformly dispersed in the polydimethylsiloxane In the membrane solution, let it stand at room temperature for 12 hours to remove the air bubbles in the membrane solution. Then use a scraper to evenly coat the film-forming solution on a smooth glass plate, and place the glass plate with the film-forming solution in an oven at 100° C. for 3 hours to form a cross-linked film. Finally, the glass plate was taken out from the oven, and the prepared polydimethylsiloxane-carbon nanotube composite film was peeled off, with a film thickness of 200 μm, and fixed in a membrane cell for separation and pur...

Embodiment 2

[0054] Preparation of a composite film with a carbon nanotube addition of 5 wt%: polydimethylsiloxane and a crosslinking agent were mixed at a ratio of 10:1 to obtain a polydimethylsiloxane film liquid. Add 5wt% carbon nanotubes to the polydimethylsiloxane membrane liquid, the carbon nanotubes are 10 μm in length and 11 nm in diameter, and 25wt% n-pentane is added to make the carbon nanotubes evenly dispersed in the polydimethylsiloxane membrane solution, at room temperature for 12 h to remove the air bubbles in the membrane solution. Then use a scraper to evenly coat the film-forming solution on a smooth glass plate, and place the glass plate with the film-forming solution in an oven at 100° C. for 3 hours to form a cross-linked film. Finally, the glass plate was taken out from the oven, and the prepared polydimethylsiloxane-carbon nanotube composite membrane was peeled off. The thickness of the membrane was 200 μm, and it was fixed in the membrane pool for separation and pur...

Embodiment 3

[0057] Preparation of composite membrane with 10wt% addition of carbon nanotubes: polydimethylsiloxane and crosslinking agent were mixed at a ratio of 10:1 to obtain polydimethylsiloxane membrane liquid. Add 10wt% carbon nanotubes to the polydimethylsiloxane membrane solution, the carbon nanotubes are 10 μm in length and 11nm in diameter, and 50wt% n-pentane is added to make the carbon nanotubes evenly dispersed in the polydimethylsiloxane membrane solution, at room temperature for 12 h to remove the air bubbles in the membrane solution. Then use a scraper to evenly coat the film-forming solution on a smooth glass plate, and place the glass plate with the film-forming solution in an oven at 100° C. for 3 hours to form a cross-linked film. Finally, the glass plate was taken out from the oven, and the prepared polydimethylsiloxane-carbon nanotube composite membrane was peeled off. The thickness of the membrane was 200 μm, and it was fixed in the membrane pool for separation and ...

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Abstract

The invention discloses a preparation method of a polydimethylsiloxane-carbon nano tube composite membrane. The preparation method comprises the following steps of (1) preparing a polydimethylsiloxane membrane solution: fully and uniformly mixing polydimethylsiloxane and a cross-linking agent based on the mass ratio of 10:1; (2) adding carbon nano tubes and a dissolution promoter to the polydimethylsiloxane membrane solution, fully stirring to be uniform, uniformly coating the membrane solution on a smooth substrate, and drying the membrane at the constant temperature for 3-9 hours, so as to obtain the polydimethylsiloxane-carbon nano tube composite membrane. The invention further discloses a composite membrane prepared by the method and a method for separating and purifying butyl alcohol by utilizing the prepared composite membrane. According to the polydimethylsiloxane-carbon nano tube composite membrane prepared by the method disclosed by the invention, the production, separation and purification efficiencies of the butyl alcohol and acetone are effectively improved, and the further technical support is provided for the production, separation and purification of liquid bio-fuel and biology-base chemical products for mainly producing the butyl alcohol and the acetone by a biological method currently.

Description

technical field [0001] The invention relates to a polydimethylsiloxane-carbon nanotube composite membrane method, the composite membrane prepared by the composite membrane, and a method for separating and purifying butanol using the composite membrane, belonging to the field of chemical engineering. Background technique [0002] Butanol is an important chemical raw material and is expected to become a new generation of biofuel. Due to the severe shortage of petroleum resources, the production of butanol by chemical methods using petroleum as raw materials is limited, and the production of butanol by microbial fermentation as a sustainable butanol production method has received extensive attention (Ni, Y., Sun, Z.H., Recent progress on industrial fermentative production of acetone-butanol-ethanol by Clostridium acetobutylicum in China. Appl Microbiol Biotechnol.83(3):415-423, 2009). During butanol fermentation, because the fermentation products acetone and butanol have a tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D69/12B01D67/00C07C31/12C07C29/76
Inventor 薛闯杜广庆陈丽杰白凤武
Owner DALIAN UNIV OF TECH
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