Imide-bridged polysiloxane gas separation membrane and preparation method thereof

A technology of gas separation membrane and polysiloxane, which is applied in the direction of separation method, semipermeable membrane separation, dispersed particle separation, etc., can solve the problems of mutual restriction of gas permeability and selectivity, and achieve increased free volume and good permeability Sexual, highly selective effect

Inactive Publication Date: 2020-11-24
QIQIHAR UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary polysiloxane, like most other polymer materials, has a mutual restriction relationship between gas permeability and selectivity.

Method used

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  • Imide-bridged polysiloxane gas separation membrane and preparation method thereof
  • Imide-bridged polysiloxane gas separation membrane and preparation method thereof

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Embodiment Construction

[0017] The specific technical solutions of the present invention are described in conjunction with the examples.

[0018] An imide-bridged polysiloxane gas separation membrane, the preparation method of which is as follows:

[0019] (1) In a reaction vessel filled with nitrogen, add a THF solution of pentamethylcyclotrisiloxane, stir in a dry ice and acetone mixed bath to below -78°C, then add lithium trimethylsiloxane and continue at -78°C React for 4 hours; then add trimethylchlorosilane, the molar ratio of each material is 1:100:0.2:0.04, continue to react for 5 hours, remove the solvent by rotary evaporation under reduced pressure to an oily substance.

[0020] (2) Under nitrogen protection, add diallyl imide in the reaction vessel, then add Karstedt catalyst, freshly steam toluene and step (1) gained oil and stir for 15 hours, filter to remove insoluble matter, pour ether , the unreacted compound was precipitated, and the precipitate was removed by filtration. After rota...

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Abstract

The invention belongs to the field of high polymer materials and engineering, and specifically relates to a preparation method for an imide-bridged polysiloxane gas separation membrane. The preparation method is used for preparing a gas separation membrane by copolymerizing diallyl imide and a hydrogen-containing siloxane oligomer. By adoption of a solution polymerization method, a polymer is precipitated through methyl alcohol; film laying is carried out on glass after tetrahydrofuran is used to dissolve the polymer; and the imide-bridged polysiloxane gas separation membrane prepared by usingthe preparation method provided by the invention has enough stability, good permeability to oxygen and high selectivity to oxygen/nitrogen, and solves the problem that the gas permeability and selectivity of a conventional macromolecular gas separation membrane are mutually restricted.

Description

technical field [0001] The invention belongs to the field of polymer material engineering, in particular to an imide-bridged polysiloxane gas separation membrane and a preparation method thereof. Background technique [0002] Polysiloxane (Polysiloxanes) is a polymer with repeated Si-O-Si bonds as the main chain and organic groups directly connected to silicon atoms. However, ordinary polysiloxane, like most other polymer materials, has a mutual restriction relationship between gas permeability and selectivity. Contents of the invention [0003] The object of the present invention is to provide a preparation method of a novel imide-bridged polysiloxane gas separation membrane, which can effectively improve the permeability coefficient of oxygen and the separability coefficient of oxygen / nitrogen. [0004] The purpose of the present invention is achieved through the following technical solutions: [0005] An imide-bridged polysiloxane gas separation membrane obtained by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/388C08G77/04C08J5/18B01D53/22B01D67/00B01D71/70C08L83/08
CPCB01D53/228B01D67/0002B01D71/70C08G77/04C08G77/388C08J5/18C08J2383/08
Inventor 徐双平王民周海亮王馨甜徐靖宇贾宏葛马文强张明宇姜鹏飞赵雯雯
Owner QIQIHAR UNIVERSITY
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