Polyvinyl acetate/polyion liquid semi-interpenetrating polymer network film and photocuring preparation method thereof

A polyvinyl acetate, polyionic liquid technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of difficult gas separation, large membrane brittleness, etc., to achieve convenient operation and compatibility. Good, improve the effect of mechanical strength

Inactive Publication Date: 2014-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rigidity of the pure polyionic liquid segment is strong, and the membrane is brittle, so it is difficult to be directly used for gas separation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of film-making feed solution:

[0025] 8.8 parts of polyvinyl acetate (molecular weight: 40,000), 87.3 parts of tetrahydrofuran, and 3.9 parts of 1-octyl-3-vinylimidazole hexafluorophosphate were uniformly mixed at 50° C. to form a film-making solution.

[0026] 2) Cross-linking to form an interpenetrating network polymer film:

[0027] Add 0.25 parts of 1,6-hexanediol diacrylate and 0.05 parts of 1-hydroxycyclohexyl phenyl ketone to the above-mentioned film-making liquid and mix evenly at 25°C, and ultrasonically treat the mixed film-making liquid After 20 minutes, place it on a tetrafluoroethylene mold, let it stand for 10 minutes, and then cure it in a flat UV curing machine for 1 hour until it is cross-linked and formed into a film.

[0028] 3) Post-processing:

[0029] The prepared semi-IP membrane was dried in air for 24 hours, and then transferred to a vacuum drying oven at 30° C. for 12 hours to obtain a vinyl acetate / polyionic liquid semi-IP po...

Embodiment 2

[0032] 1) Preparation of film-making feed solution:

[0033] 8.8 parts of polyvinyl acetate (molecular weight: 40,000), 87.3 parts of acetone, and 3.9 parts of 1-hexyl-3-vinylimidazole hexafluorophosphate were uniformly mixed at 50° C. to form a film-making solution.

[0034] 2) Cross-linking to form an interpenetrating network polymer film:

[0035] Add 0.5 parts of 1,6-hexanediol diacrylate and 0.1 part of 1-hydroxycyclohexyl phenyl ketone to the above-mentioned film-making liquid, mix well at 25°C, and ultrasonically treat the mixed film-making liquid After 20 minutes, place it on a tetrafluoroethylene mold, let it stand for 10 minutes, and then cure it in a flat UV curing machine for 1 hour until it is cross-linked and formed into a film.

[0036] 3) Post-processing:

[0037] The prepared semi-IP membrane was dried in air for 24 hours, and then transferred to a vacuum drying oven at 30° C. for 12 hours to obtain a vinyl acetate / polyionic liquid semi-IP polymer network me...

Embodiment 3

[0040] 1) Preparation of film-making feed solution:

[0041] 7 parts of polyvinyl acetate (molecular weight: 40,000), 85.5 parts of tetrahydrofuran, and 7.5 parts of 1-octyl-3-vinylimidazole hexafluorophosphate were uniformly mixed at 50°C to form a film-forming solution.

[0042] 2) Cross-linking to form an interpenetrating network polymer film:

[0043] Add 0.5 parts of 1,6-hexanediol diacrylate and 0.05 parts of 1-hydroxycyclohexyl phenyl ketone to the above-mentioned film-making liquid, mix well at 25°C, and ultrasonically treat the mixed film-making liquid After 20 minutes, place it on a tetrafluoroethylene mold, let it stand for 10 minutes, and then cure it in a flat UV curing machine for 1 hour until it is cross-linked and formed into a film.

[0044] 3) Post-processing:

[0045] The prepared semi-IP membrane was dried in air for 24 hours, and then transferred to a vacuum drying oven at 30° C. for 12 hours to obtain a vinyl acetate / polyionic liquid semi-IP polymer netwo...

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Abstract

The invention belongs to the field of preparation of gas separation films, and particularly relates to a polyvinyl acetate / polyion liquid semi-interpenetrating polymer network film and a photocuring preparation method thereof. The preparation method comprises the following steps: 1) preparing a film preparation solution, namely uniformly mixing polyvinyl acetate, a solvent and an ionic liquid monomer at 50 DEG C to form the film preparation solution; 2) crosslinking to form an interpenetrating network polymer film: adding a crosslinking agent and a photoinitiator into the film preparation solution, carrying out ultrasonic treatment on the mixed film preparation solution, and curing in a photocuring machine until the film preparation solution is crosslinked into a film; and 3) after-treatment: drying the prepared film in air for 24 hours, transferring into a vacuum drying oven, and drying at 30 DEG C for 12 hours. The polymerizable ionic liquid monomer used as one component in the semi-interpenetrating polymer network film has the advantages of favorable compatibility with other components, high stability and low tendency to loss, and can ensure the physical structure and enduring and stable properties of the film.

Description

technical field [0001] The invention belongs to the field of gas separation membrane preparation, in particular to a polyvinyl acetate / polyionic liquid semi-interpenetrating polymer network membrane and a photocuring preparation method thereof. Background technique [0002] Over the past few decades, with the extensive use of fossil fuels, CO in the air 2 The sharp increase in the content of the compound has exacerbated the global greenhouse effect. Currently, it is used to separate CO from combustion exhaust 2 The methods and technologies are adsorption, absorption, cryogenic condensation and membrane separation. Membrane separation technology has become one of the most important technologies for researching CO due to its advantages of low energy consumption, small equipment scale, and easy combination with other technologies. 2 Separated hotspots. Polyvinyl acetate (PVAc) is a cheap and easy-to-obtain glassy polymer, because the molecular chain contains a polar carbony...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D69/10B01D67/00
Inventor 白云翔高慧张春芳
Owner JIANGNAN UNIV
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