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
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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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