Flexible silicon rubber composite membrane and preparation method and application thereof

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...

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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.

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