A kind of sandwich structure polyether block amide gel membrane and its thermal crosslinking preparation method
A technology of polyether block amide gel membrane and polyether block amide, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of easy overflow of functional carriers, unfavorable industrial application, poor mechanical properties, etc. problems, to achieve the effect of providing permeate flux and separation selectivity, high permeate flux and separation selectivity, and good mechanical properties
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Embodiment 1
[0022] (1) Preparation of gel film:
[0023] 10 parts of polyether block amide (the mass ratio of polytetrahydrofuran segment and nylon 12 segment is 4:1), 75 parts of n-butanol and 15 parts of 1-octyl-3-vinylimidazole tetrafluoroborate After mixing evenly at 60°C, spread it on a polytetrafluoroethylene plate, and dry the solvent to prepare a gel film.
[0024] (2) Thermal crosslinking of the film surface:
[0025] The upper and lower surfaces of the above-mentioned gel film are coated with a layer of n-butanol solution containing a thermal initiator and a crosslinking agent, wherein 0.5 parts of thermal initiator azobisisobutyronitrile, 3.5 parts of crosslinking agent 1,6-hexanedi Alcohol diacrylate, 96 parts of n-butanol, transferred to an oven for curing at 70°C for 18 hours, to carry out thermal crosslinking of the surface layer of the gel film.
[0026] (3) Post-processing:
[0027] The thermally cross-linked gel film was dried in the air for 24 hours, then transferred...
Embodiment 2
[0030] (1) Preparation of gel film:
[0031] 15 parts of polyether block amide (the mass ratio of polytetrahydrofuran segment and nylon 12 segment is 2:3), 75 parts of isopropanol and 10 parts of 1-octyl-3-vinylimidazole hexafluorophosphate in After mixing evenly at 80°C, spread it on a polytetrafluoroethylene board, and dry the solvent to obtain a gel film.
[0032] (2) Thermal crosslinking of the film surface:
[0033] The upper and lower surfaces of the above-mentioned gel film are coated with a layer of n-butanol solution containing a thermal initiator and a crosslinking agent, wherein 0.8 parts of thermal initiator azobisisoheptanonitrile, 4 parts of crosslinking agent ethylene dimethacrylate Alcohol ester, 95.2 parts of n-butanol, transferred to an oven for curing at 60°C for 25 hours to carry out thermal crosslinking of the surface layer of the gel film.
[0034] (3) Post-processing:
[0035] The thermally cross-linked gel film was dried in the air for 24 hours, then...
Embodiment 3
[0038] (1) Preparation of gel film:
[0039] 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 70°C, spread on a polytetrafluoroethylene plate, and the solvent was dried to obtain a gel film.
[0040] (2) Thermal crosslinking of the film surface:
[0041] Coat the upper and lower surfaces of the above-mentioned gel film with a layer of n-butanol solution containing a thermal initiator and a crosslinking agent, wherein 1 part of thermal initiator azoisobutylcyanoformamide, 4 parts of crosslinking agent 1,6- Hexylene glycol diacrylate and 95 parts of n-butanol were transferred to an oven for curing at 70° C. for 10 hours to carry out thermal crosslinking of the surface layer of the gel film.
[0042] (3) Post-processing:
[0043] The thermally cross-linke...
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