A kind of sandwich structure polyether block amide gel film and its photocrosslinking preparation method
A polyether block amide gel membrane, polyether block amide technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, to improve mechanical properties and stability, good mechanical properties, non-volatile Effect
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Embodiment 1
[0022] (1) Preparation of gel film:
[0023] 15 parts of polyether block amide (the mass ratio of polytetrahydrofuran segment and nylon 12 segment is 4:1), 70 parts of n-butanol and 15 parts of 1-octyl-3-vinylimidazole bistrifluoromethanesulfonate The imide salt was evenly mixed at 65°C and spread on a polytetrafluoroethylene plate, and the solvent was dried to obtain a gel film.
[0024] (2) Photocrosslinking of the film surface:
[0025] The upper and lower surfaces of the above gel film are coated with a layer of n-butanol solution containing photoinitiator and crosslinking agent, wherein 0.5 parts of photoinitiator 1-hydroxycyclohexyl phenyl ketone, 3 parts of crosslinking agent divinyl Benzene and 96.5 parts of n-butanol were transferred to a UV curing machine for curing for 20 minutes to carry out photocrosslinking of the surface layer of the gel film.
[0026] (3) Post-processing:
[0027] The photocrosslinked gel film was dried in the air for 24 hours, then transfer...
Embodiment 2
[0030] (1) Preparation of gel film:
[0031] 10 parts of polyether block amide (wherein the mass ratio of polytetrahydrofuran segment and nylon 12 segment is 3:2), 70 parts of n-butanol / isopropanol mixed solvent with a mass ratio of 3:1 and 20 parts of 1 - Octyl-3-vinylimidazolium tetrafluoroborate was evenly mixed at 60° C. and spread on a polytetrafluoroethylene plate, and the solvent was dried to obtain a gel film.
[0032] (2) Photocrosslinking of the film surface:
[0033] The upper and lower surface layers of the above-mentioned gel film are all coated with a n-butanol solution containing a photoinitiator and a crosslinking agent, wherein 0.2 parts of the photoinitiator 2-hydroxyl-2-methyl-1-phenyl-1-acetone, 2 parts of crosslinking agent 1,6-hexanediol diacrylate and 97.8 parts of n-butanol were transferred to a UV curing machine for curing for 20 minutes to carry out photocrosslinking of the surface layer of the gel film.
[0034] (3) Post-processing:
[0035] The p...
Embodiment 3
[0038] (1) Preparation of gel film:
[0039] 15 parts of polyether block amide (wherein the mass ratio of polytetrahydrofuran segment and nylon 12 segment is 2 ∶ 3), 75 parts of isopropanol and 10 parts of 1-octyl-3-vinylimidazolium hexafluorophosphate were mixed evenly at 80°C and spread on a polytetrafluoroethylene board, and the solvent was dried to obtain a gel film .
[0040] (2) Photocrosslinking of the film surface:
[0041] The upper and lower surface layers of the above-mentioned gel film are all coated with a layer of n-butanol solution containing photoinitiator and crosslinking agent, wherein 0.8 part of photoinitiator 2-hydroxyl-2-methyl-1-phenyl-1-acetone, 4 parts of cross-linking agent ethylene glycol dimethacrylate and 95.2 parts of n-butanol were transferred to a UV curing machine for curing for 20 minutes to carry out photo-crosslinking of the surface layer of the gel film.
[0042] (3) Post-processing:
[0043] The photocrosslinked gel film was dried in t...
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