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Preparation and application of a fluorine-containing hybrid silicon membrane

A technology of hybrid silicon membrane and triethoxyfluorosilane, which is applied in the preparation and application field of fluorine-containing hybrid silicon membrane, can solve the problem of low separation effect of silicon membrane and achieve the effect of saving production cost

Active Publication Date: 2020-04-28
CHANGZHOU UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the problem that the silicon membrane has a low separation effect in the separation of alcohol and water, the invention provides a preparation and application of a fluorine-containing hybrid silicon membrane

Method used

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  • Preparation and application of a fluorine-containing hybrid silicon membrane
  • Preparation and application of a fluorine-containing hybrid silicon membrane

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Experimental program
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Embodiment 1

[0024] (1) Under the catalysis of hydrochloric acid, the polymerized sol is prepared by the hydrolysis polymerization reaction of the fluorine-containing silicon source precursor triethoxyfluorosilane, and the molar ratio of triethoxyfluorosilane to HCl is controlled to be 1:0.3, And dilute the obtained polymeric sol concentration to 0.4wt%;

[0025] (2) Wipe-coat silicon-zirconium sol (0.2wt%) on the ceramic support body by thermal coating method, and calcined for 20 minutes to form a film at a high temperature of 550° C., and repeat the operation of wiping silicon-zirconium sol and calcining 7 times to obtain the transition layer of the membrane;

[0026] (3) Wipe-coat the polymeric sol obtained in step (1) on the transition layer obtained in step (2) by thermal coating, and then calcined at 300° C. for 25 minutes after coating, and repeat the operation of wiping the sol and calcining 2 times to obtain an amorphous fluorine-containing hybrid silicon film.

[0027] The amor...

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Abstract

The invention belongs to the field of preparation of membrane materials and particularly relates to preparation and application of a fluorinated hybrid silicon membrane. The preparation and application comprise the steps of subjecting a silicon source precursor, i.e., triethoxy fluorosilane to a hydrolytic-polymeric reaction so as to prepare sol, then, carrying out coating by a hot coating method so as to prepare a separation membrane, i.e., the amorphous fluorinated hybrid silicon membrane, and then, applying the obtained amorphous fluorinated hybrid silicon membrane to alcohol-water separation.

Description

technical field [0001] The invention belongs to the field of membrane material preparation, in particular to the preparation and application of a fluorine-containing hybrid silicon membrane. Background technique [0002] Using orthoethyl silicate (TEOS) as the silicon source precursor, the microporous inorganic silicon membrane prepared by the sol-gel method exhibits excellent molecular sieving ability in gas separation (such as H 2 and N 2 The permselectivity in the separation is greater than 100). However, its -Si-O-Si- network structure is unstable in water vapor environment, which greatly limits the application of traditional inorganic silicon membranes in molecular separation in aqueous environment. [0003] And by introducing hydrophobic organic bridging groups (such as Si-CH 2 -CH 2 -Si), can improve the hydrothermal stability of the membrane, but the flux and separation factor of the membrane in alcohol-water separation are also not high. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D67/00
CPCB01D67/0079B01D71/70B01D2325/38
Inventor 徐荣姜万钟璟
Owner CHANGZHOU UNIV
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