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Automatic roll-coating method and automatic roll-coating device of ethanol-permselective composite membrane

A technology that preferentially permeates alcohol and composite membranes. It is used in semi-permeable membrane separation, chemical instruments and methods, and membrane technology. It can solve problems such as unstable performance, low permeation flux, and surface defects.

Inactive Publication Date: 2015-06-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional method is used to prepare alcohol-preferential composite membranes, the thickness of the separation layer formed on the surface of the support is relatively thick, resulting in low permeation flux; or it is easy to form defects on the surface, resulting in unstable performance, which limits its industrial application

Method used

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  • Automatic roll-coating method and automatic roll-coating device of ethanol-permselective composite membrane
  • Automatic roll-coating method and automatic roll-coating device of ethanol-permselective composite membrane
  • Automatic roll-coating method and automatic roll-coating device of ethanol-permselective composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The base membrane is made of polysulfone (PS) material, a flat ultrafiltration membrane with a molecular weight cut-off of 20,000 and a membrane area of ​​600cm 2 , the composite material used is polydimethylsiloxane (PDMS, viscosity 2500Pa·S), and the solvent is n-heptane.

[0035] Assembly conditions and methods:

[0036] (1) Polydimethylsiloxane (PDMS) is made into a 10wt% solution with n-heptane, and 1wt% crosslinking agent orthosilicate (TEOS) is added in the solution, and 0.02wt% catalyst dilaurel dibutyltin acid;

[0037] (2) Pour the above-mentioned feed liquid into the feed storage tank, and transport the feed liquid to the feed liquid tank through the peristaltic pump and hose in the automatic feeding device;

[0038] (3) Fix the two ends of the base film in the groove of the roller of the coating machine with a clamp, adjust the height of the feed liquid tank through the lifting platform and the scale at one end of the roller, so that the lowest outer surfa...

Embodiment 2

[0045] The base membrane is made of polysulfone (PS) material, a flat ultrafiltration membrane with a molecular weight cut-off of 20,000 and a membrane area of ​​600cm 2 , the composite material used is polydimethylsiloxane (PDMS, viscosity 2500Pa·S), and the solvent is n-heptane.

[0046] Assembly conditions and methods:

[0047](1) Polydimethylsiloxane (PDMS) is made into a 10wt% solution with n-heptane, and 1wt% crosslinking agent orthosilicate (TEOS) is added in the solution, and 0.02wt% catalyst dilaurel dibutyltin acid;

[0048] (2) Pour the above-mentioned feed liquid into the feed storage tank, and transport the feed liquid to the feed liquid tank through the peristaltic pump and hose in the automatic feeding device;

[0049] (3) Fix the two ends of the base film in the groove of the roller of the film coating machine with a clamp, adjust the height of the feed liquid tank through the lifting platform and the scale at one end of the roller, so that the depth of the r...

Embodiment 3

[0056] The base membrane is made of polysulfone (PS) material, a flat ultrafiltration membrane with a molecular weight cut-off of 20,000 and a membrane area of ​​600cm 2 , the composite material used is polydimethylsiloxane (PDMS, viscosity 2500Pa·S), and the solvent is n-heptane.

[0057] Assembly conditions and methods:

[0058] (1) Polydimethylsiloxane (PDMS) is made into a 10wt% solution with n-heptane, and 1wt% crosslinking agent orthosilicate (TEOS) is added in the solution, and 0.02wt% catalyst dilaurel dibutyltin acid;

[0059] (2) Pour the above-mentioned feed liquid into the feed storage tank, and transport the feed liquid to the feed liquid tank through the peristaltic pump and hose in the automatic feeding device;

[0060] (3) Fix the two ends of the base film in the groove of the roller of the film coating machine with a clamp, adjust the height of the feed liquid tank through the lifting table and the scale at one end of the roller, so that the depth of the rol...

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Abstract

The invention discloses an automatic roll-coating method and device of an ethanol-permselective composite membrane, belonging to the technical field of membrane coating of separation membranes. A coating device comprises a roller, a gear, a support plate, a base, a motor, a feed liquid tank, a lifting table and the like. The coating method provided by the invention comprises the following steps: pouring membrane preparing liquid into a storage tank, conveying the feed liquid to the feed liquid tank through an automatic feeding device, adjusting the height of the feed liquid tank by using the lifting table and the scale marks at one end of the roller; rotating the roller through the driving of the motor so as to uniformly coat a base membrane with the feed liquid. Through the adoption of the method and the device disclosed by the invention, the thickness of a separation layer can be effectively controlled and reduced, the permeation flux is greatly improved, and the automatic coating of the ethanol-permselective composite membrane is realized.

Description

technical field [0001] The invention belongs to the technical field of separation membrane coating, and relates to an automatic coating device and method for a separation membrane, in particular to an automatic roll coating device and method for preparing an alcohol-preferential composite membrane. Background technique [0002] As oil prices rise, fuel ethanol and butanol, as a new type of biofuel, are highly valued by countries all over the world for their advantages of high efficiency and cleanliness. The coupling of pervaporation and biological fermentation technology is an important way to improve the fermentation rate and yield. Pervaporation uses selective membrane separation technology to achieve alcohol / water separation without evaporating the mixture to the boiling point, low energy consumption, high separation purity, no secondary pollution, and continuous operation of the entire system. [0003] Generally speaking, the preparation methods of alcohol permeable fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12
Inventor 纪树兰李杰闫浩张国军王乃鑫秦振平
Owner BEIJING UNIV OF TECH
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