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Preparation method of efficient and durable solid-phase extraction membrane

A solid-phase extraction membrane and durable technology, which is applied in the field of high-efficiency and durable solid-phase extraction membrane preparation, can solve the problems of low reuse rate, high membrane price, increased use cost, etc., and achieves low cost, high specific surface area, adsorption Efficient effect

Active Publication Date: 2022-04-01
SOUTHWEST UNIVERSITY
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  • Description
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  • Application Information

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Problems solved by technology

[0002] Most of the existing solid-phase extraction membranes are chemically bonded silica gels of various hydrocarbon-based silanes. Among the alkyl groups, C18 is the most expensive. Reuse about 5 times, while Supelco's ENVI-Disk C18 membrane can only be used once, and the membrane is easily blocked), resulting in increased use costs

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  • Preparation method of efficient and durable solid-phase extraction membrane
  • Preparation method of efficient and durable solid-phase extraction membrane
  • Preparation method of efficient and durable solid-phase extraction membrane

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing:

[0021] Aiming at the shortcomings of the existing solid phase extraction membranes on the market, it combines the advantages of graphene oxide and polydimethylsiloxane. In the invention, the glass fiber membrane is used as a supporting layer, and the glass fiber-graphene oxide-polydimethylsiloxane composite membrane is prepared by a sol-gel method. The reagents used and the preparation steps are as follows:

[0022] Reagents: graphite powder, concentrated sulfuric acid, concentrated phosphoric acid, hydrogen peroxide (H 2 o 2 , 30%), hydrochloric acid (HCl, 30%), absolute ethanol, hydrofluoric acid (HF, 3mol / L), trifluoroacetic acid (TFA, 99%), tetraethyl orthosilicate (TEOS, 99%) , polymethylhydrogensiloxane (PMHS), polydimethylsiloxane (PDMS), glass fiber membrane (diameter 47mm)

[0023] Preparation of glass fiber-graphene oxide-polydimethylsiloxane composite film: ...

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Abstract

The invention discloses a preparation method of an efficient and durable solid-phase extraction membrane, which comprises the steps of pretreatment of a glass fiber membrane, preparation of graphene oxide, preparation of a coating liquid and preparation of a composite membrane by a sol-gel method. The composite membrane prepared by coating the graphene oxide and the polydimethylsiloxane has the characteristics of being porous, high in specific surface area and chemical stability, high in adsorption rate, recyclable, non-toxic, low in cost, green and environment-friendly, and has popularization and application values.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing an efficient and durable solid-phase extraction membrane. Background technique [0002] Most of the existing solid-phase extraction membranes are chemically bonded silica gels of various hydrocarbon-based silanes. Among the alkyl groups, C18 is the most expensive. It can be reused about 5 times, while Supelco's ENVI-Disk C18 membrane can only be used once, and the membrane is easily blocked), resulting in increased use costs. The development of a solid-phase extraction membrane that has strong adsorption capacity for organic pollutants in water samples, can be reused, and is low in price will be very helpful for reducing detection costs and carrying out general surveys of organic pollutants. Contents of the invention [0003] The object of the present invention is to provide an efficient and durable solid phase extraction membrane preparation m...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D69/10B01D67/00B01D15/08
Inventor 孙玉川沈立成王永啟
Owner SOUTHWEST UNIVERSITY