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Flexible silicon rubber composite membrane and preparation method and application thereof

A silicone rubber composite membrane and silicone rubber technology, applied in the field of composite membranes, can solve the problems of inability to achieve curling, poor solvent resistance, low gas flux, etc., and achieve continuous production, easy process amplification, and preparation process optimization. Effect

Inactive Publication Date: 2016-12-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a lot of research on silicone rubber membranes is dedicated to the preparation of non-supported silicone rubber membranes or composite silicone rubber membranes supported by organic materials such as non-woven fabrics and polysulfone. Poor performance, poor solvent resistance and low lifetime
Inorganic supports such as ceramic tubes and porous stainless steel have the advantages of high flux, high mechanical strength, good thermal stability, and good chemical stability, and are ideal support materials for preparing gas separation membranes. However, these commonly used The inorganic support has poor flexibility and brittleness, and cannot be curled. The reprocessing ability of the prepared membrane material is weak, and the corresponding module packing density is lower than that of spiral wound or hollow fiber membrane modules commonly used in gas separation.

Method used

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  • Flexible silicon rubber composite membrane and preparation method and application thereof
  • Flexible silicon rubber composite membrane and preparation method and application thereof
  • Flexible silicon rubber composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix 10g PDMS (as a silicone rubber monomer) with H 2 Mixture of PtCl (as catalyst) and methyltriethoxysilane (as crosslinker), PDMS with H 2 The mass ratio of PtCl is 1:0.02, and the mass ratio of PDMS and methyltriethoxysilane is 1:0.5. After mixing, n-hexane is used as a solvent to prepare a film-making solution with a PDMS concentration of 20wt.%. A composite membrane was prepared on a 325-mesh stainless steel screen, and the impregnated composite membrane was evaporated for 6 hours at room temperature, and cross-linked and cured at 120°C for 8 hours to obtain a composite PDMS membrane; the cross-linked and cured PDMS membrane was placed in a heating furnace for Heat treatment, using argon as the carrier gas, the flow rate is 40ml / min, the heating rate is 2°C / min, the final temperature of heat treatment is 280°C, and the constant temperature time is 1h; after the final temperature is reached, oxygen nitrogen with an oxygen content of 1% is introduced Mixed gas, cons...

Embodiment 2-4

[0061] The procedure of Example 1 was repeated for the silicone rubber monomers specified in Table 1 below, and the test results are listed in Table 1 below.

[0062] Table 1

[0063]

Embodiment 5-6

[0065] The procedure of Example 1 was repeated with the catalysts specified in Table 2 below, where the test results are listed.

[0066] Table 2

[0067]

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Abstract

The invention relates to a flexible silicone rubber composite membrane and a preparation method and application of the flexible silicone rubber composite membrane, and belongs to the field of composite membranes. The flexible silicone rubber composite membrane comprises a flexible metal wire mesh and silicone rubber polymers; the silicone rubber polymers are used as continuous phases to be in close combination with the flexible metal wire mesh which is used as a supporting body, and completely filled among longitude and latitude structures of the flexible metal wire mesh to form the flexible silicon rubber composite membrane with a continuous interpenetrating network structure. The flexible silicon rubber composite membrane for separating hydrocarbon gases provided by the invention has good hydrocarbon-gas separation performance, mechanical strength and flexibility, and can keep the structure and performance stable for a long term at higher temperature after being subjected to heat stabilization treatment. The preparation method of the flexible silicon rubber composite membrane for separating the hydrocarbon gases provided by the invention is simple in process, easy to control and capable of realizing continuous production, and further easy for realizing process scale-up, and has industrial production prospects.

Description

technical field [0001] The invention relates to a flexible silicone rubber composite membrane, a preparation method and application thereof, and belongs to the field of composite membranes. Background technique [0002] Hydrocarbon gas is an important basic organic chemical raw material, which usually exists in a large amount in the form of oil and gas in the associated gas of oil and gas fields, or is generated in the process of oil extraction, refining, storage and transportation. The main components of oil and gas are mixtures of hydrocarbon gases and air. The random discharge of oil and gas will lead to a series of environmental problems such as the greenhouse effect and photochemical smog, and the direct combustion of oil and gas is a serious waste of oil resources. Therefore, the separation and recovery of oil and gas can not only realize the full utilization of resources, but also purify the air and reduce the harm to the environment. At present, the most commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/70B01D67/00B01D53/22C07C7/144C07C11/04C07C11/06C07C11/08C07C11/24C07C9/04C07C9/06C07C9/08C07C9/10
CPCB01D69/125B01D53/228B01D67/0079B01D71/70C07C7/144C07C11/06C07C9/08C07C9/04C07C9/06C07C11/04C07C11/24C07C11/08C07C9/10
Inventor 李琳王同华王鸿王春雷金鑫刘峤
Owner DALIAN UNIV OF TECH
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