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Silicone rubber composite film, its preparation method and its use

A silicone rubber composite membrane and polymer membrane technology, which is applied in separation methods, chemical instruments and methods, and membrane technology, can solve the problems of high cost of composite membranes, achieve high price advantages, broad application prospects, and reduce membrane production costs. Effect

Active Publication Date: 2016-06-08
DALIAN EUROFILM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a method for preparing a silicone rubber composite membrane, which does not use expensive noble metal catalysts for the problem that the cost of the composite membrane is relatively high due to the use of noble metal catalysts in the production of the above-mentioned existing composite membranes. Effectively reduces the cost of film production and facilitates industrial implementation

Method used

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  • Silicone rubber composite film, its preparation method and its use

Examples

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Effect test

Embodiment 1

[0031] This embodiment provides a method for preparing a silicone rubber composite membrane with polysulfone as the bottom membrane and silicone rubber as the separation layer. The steps are as follows:

[0032] Take 2g of polydimethylsiloxane (PDMS) and 2g of amino silicone oil and dissolve them in n-hexane to prepare a casting solution with a total mass of 100g. After stirring for 1 h, a transparent and uniform solution was formed, and on the cleaned polysulfone bottom membrane (pure water flux 14.2L / (m 2 h), with a molecular weight cut-off of 35,000), coat the surface with a layer of the casting solution, dry in the air for 20 minutes, and then dry at 70° C. for 4 hours. The measured penetration rate J N2 =213GPU, separation coefficient α=1.6. It can be seen that the separation coefficient of the silicone rubber composite membrane prepared by the present invention is relatively low.

Embodiment 2

[0034] This embodiment provides a method for preparing a silicone rubber composite membrane with polysulfone as the bottom membrane and silicone rubber as the separation layer. The steps are as follows:

[0035] Dissolve 3g of PDMS and 3g of amino silicone oil in n-hexane to prepare a casting solution with a total mass of 100g. After stirring for 1 h, a transparent and uniform solution was formed, and on the cleaned polysulfone bottom membrane (pure water flux 14.2L / (m 2 h), with a molecular weight cut-off of 35000), coat a layer of the casting solution on the surface, dry in the air for 20 minutes, and then dry at 70° C. for 4 hours. The measured penetration rate J N2 =165GPU, separation coefficient α=1.9. The silicone rubber composite membrane obtained under this condition has higher selectivity and lower permeation rate.

Embodiment 3

[0037] This embodiment provides a method for preparing a silicone rubber composite membrane with polysulfone as the bottom membrane and silicone rubber as the separation layer. The steps are as follows:

[0038] Take 3.5g of PDMS and 3.5g of amino silicone oil and dissolve them in n-hexane to prepare a casting solution with a total mass of 100g. After stirring for 1 h, a transparent and uniform solution was formed, and on the cleaned polysulfone bottom membrane (pure water flux 14.2L / (m 2 h), with a molecular weight cut-off of 35000), coat a layer of the casting solution on the surface, dry in the air for 20 minutes, and then dry at 70° C. for 4 hours. The measured penetration rate J N2 =124GPU, separation factor α=2.2. The separation coefficient of the silicone rubber composite membrane prepared in this example is the highest, and at the same time, since the surface of the composite membrane has no defects at this time, the permeation rate is the lowest.

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Abstract

The invention provides a silicone rubber composite film, and a preparation method and usage thereof. The preparation method of the silicone rubber composite film comprises the following steps: dissolving amino silicon oil and polydiorgnosiloxane containing vinyl into an organic solvent to made a film casting liquid, wherein the mass of the amino silicon oil and the polydiorgnosiloxane containing vinyl accounts for 2 to 15 percent of the total mass, and the mass ratio of the polydiorgnosiloxane containing vinyl to the amino silicon oil is 1 / 3 to 3; coating a layer of the film casting liquid on the surface of a bottom film, airing for 10 to 60 minutes in the air, and then heating for 1 to 10 hours at 50 to 100 DEG C. The preparation method of the silicone rubber composite film, provided by the invention, is simple and scientific, and compared with the prior art, the silicone rubber composite film provided by the invention has the advantages that noble metal catalysts with high prices are not required, and the film making cost is effectively lowered.

Description

technical field [0001] The invention relates to a composite membrane preparation technology, in particular to a silicon rubber composite membrane, a preparation method and an application thereof. Background technique [0002] The development of high-performance gas separation membrane is an effective method to reduce the cost of gas separation. Membrane separation has the advantages of high efficiency, energy saving, simple operation, and easy scale-up [C.S.Bickel, W.J.Koros, ImprovementofCO 2 / CH 4 separation characteristics of polyimides by chemical crosslinking, J.Membr.Sci., 1999, 155:145-154]. Therefore, it is of great significance to develop high-performance gas separation membranes. Silicone rubber is the polymer membrane material with the highest permeability since industrial application, and is widely used in oxygen-enriched air production, organic vapor separation and other fields. Oxygen-enriched combustion can save fuel compared with ordinary air. If oxygen-en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D69/12B01D67/00B01D53/22
Inventor 季鹏飞李泰胧王连军王忠强曲韵翔李恕广杜国栋栗广勇
Owner DALIAN EUROFILM IND