Polysilsesquioxane-modified zeolite/silicone rubber composite membrane and its application

A polysilsesquioxane, silicone rubber composite membrane technology, applied in the direction of semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve the threat of weakened interaction, structural stability and long-term stability of performance, Poor structural stability and other problems, to achieve the effect of improving structural and performance stability, good industrial application prospects, and stable structure and performance

Active Publication Date: 2021-07-27
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of functional groups on the long alkyl chains that can chemically react with silicone rubber, the interaction between the long alkyl chains on the zeolite particles and silicone rubber is still based on van der Waals forces, and the structural stability and long-term stability of performance are seriously threatened. , for example, during operation, the interaction between zeolite or molecular sieve and the silicone rubber matrix is ​​weakened due to the long-term immersion of the membrane in the aqueous alcohol solution, swelling and other factors, the structure becomes loose, the selectivity to alcohol decreases, and the loose internal structure The permeation flux increases, the poor structural stability leads to poor performance stability, and the reduction of comprehensive separation performance is irreversible during operation, which makes it difficult to meet the stability requirements in industrial applications.

Method used

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  • Polysilsesquioxane-modified zeolite/silicone rubber composite membrane and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Polysilsesquioxane modified zeolite: mix octavinyl polysilsesquioxane inorganic particles, ZSM-5 zeolite with a silicon-aluminum ratio of 10, 0.1M chloroplatinic acid isopropanol solution catalyst and toluene solvent, Stir for 6 hours, filter, wash the filter cake with toluene solvent, and dry in an oven to obtain ZSM-5 zeolite modified by octavinyl polysilsesquioxane; polysilsesquioxane inorganic particles: zeolite: catalyst : The mass ratio of solvent is 0.1:10:0.1:20;

[0052] 2) Preparation of polysilsesquioxane modified zeolite / silicone rubber membrane solution: ZSM-5 zeolite, polyvinyltrimethylsiloxane, hydrogen-containing Silicone oil crosslinking agent, 0.1M chloroplatinic acid isopropanol solution catalyst and toluene solvent are mixed, stirred evenly, defoaming, and the product is obtained; wherein silicone rubber: polysilsesquioxane modified zeolite: crosslinking agent: catalyst: The mass ratio of solvent is 100:0.5:5:0.1:50;

[0053] 3) Preparation of p...

Embodiment 2

[0057] 1) Polysilsesquioxane-modified zeolite: mix octahydropolysilsesquioxane inorganic particles, TS-1 zeolite with a silicon-aluminum ratio of 300, 0.1M chloroplatinic acid isopropanol solution catalyst and acetone solvent, Stir for 0.5h, filter, wash the filter cake with acetone solvent, and dry in an oven to obtain TS-1 zeolite modified by octahydropolysilsesquioxane; wherein polysilsesquioxane inorganic particles: zeolite: The mass ratio of catalyst: solvent is 5:10:0.5:100;

[0058] 2) Preparation of polysilsesquioxane-modified zeolite / silicone rubber membrane solution: TS-1 zeolite, polyvinyltrimethylsiloxane, hydrogen-containing Silicone oil crosslinking agent, 0.1M chloroplatinic acid isopropanol solution catalyst and n-heptane solvent are mixed, stirred evenly, and defoamed to obtain the product; wherein silicone rubber: polysilsesquioxane modified zeolite: crosslinking agent: catalyst : the mass ratio of solvent is 100:60:100:5:3000;

[0059] 3) Preparation of po...

Embodiment 3

[0062] 1) Polysilsesquioxane-modified zeolite: octa[(glycidyl dimethyl)silyl]-polysilsesquioxane inorganic particles, ZSM-5 zeolite with a silicon-aluminum ratio of 600, monobutyl oxidation Mix the tin catalyst and n-hexane solvent, stir for 2 hours, filter, wash the filter cake with n-hexane solvent, and dry it in an oven to obtain octa[(glycidyl dimethyl)silyl]-polysilsesquioxane modified The final ZSM-5 zeolite; wherein the polysilsesquioxane inorganic particles: zeolite: catalyst: the mass ratio of solvent is 200:10:4:300;

[0063] 2) Preparation of polysilsesquioxane-modified zeolite / silicone rubber membrane solution: ZSM-5 zeolite modified with octa[(glycidyl dimethyl)silyl]-polysilsesquioxane in step 1, poly Mix octyltrimethylsiloxane, phenyltrimethoxysilane crosslinking agent, dibutyltin oxide catalyst and acetone solvent, stir evenly, defoam, and get it; silicone rubber: polysilsesquioxane modified After the zeolite: crosslinking agent: catalyst: the mass ratio of so...

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Abstract

The invention discloses a polysilsesquioxane modified zeolite / silicone rubber composite membrane with preferential alcohol permeability, which comprises a porous support bottom membrane and a polysilsesquioxane modified zeolite / silicone rubber composite layer coated thereon. It is prepared by cross-linking reaction between polysilsesquioxane modified zeolite and silicone rubber. The composite membrane of the present invention has a high separation factor for alcohol solutions, good permeation flux, stable structure and performance of the composite membrane under long-term operation conditions, and has a high separation factor for ethanol / water or butanol / water and The change range of permeation flux is small, and it has good industrial application prospect.

Description

technical field [0001] The invention relates to a polysilsesquioxane modified zeolite / silicone rubber composite membrane and its application, in particular to a polysilsesquioxane modified zeolite / silicone rubber composite membrane which preferentially penetrates alcohol and its use in separating alcohol solutions The application belongs to the field of pervaporation membrane separation. Background technique [0002] Since the organic / inorganic hybrid membrane can greatly improve the performance of the traditional pervaporation organic membrane, and the production cost is lower than that of the traditional inorganic membrane, it has become a hot spot and focus in the field of membrane materials. [0003] The inorganic particles used to modify the organic matrix in the literature reports mainly include carbon black, zeolite, silica, carbon nanotubes, etc. Among them, the zeolite filled membrane has better pervaporation preferential alcohol permeability, and the pore channel o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/02B01D71/34B01D71/16B01D71/64B01D71/42B01D71/68
CPCB01D67/0079B01D69/12B01D71/028B01D71/16B01D71/34B01D71/42B01D71/64B01D71/68
Inventor 展侠郭学彬何一鸣
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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