Hydrophobic porous composite membrane, preparation method, and application thereof
A porous composite membrane and porous membrane technology, applied in the field of materials, can solve the problems of large amount of hydrophilic polymer, damage of membrane structure, complicated process, etc., and achieve the effect of easy industrial production, wide selection range, and improved hydrophilicity
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Embodiment 1
[0032] A method for preparing a hydrophobic porous composite membrane, comprising the following steps:
[0033] (1) A. Add 10mmol hydroxyethyl methacrylate to the round bottom flask, then add 10ml pyridine, slowly add 15mmol cinnamoyl chloride dropwise, keep it at 0°C for 2 hours, then raise the temperature to 25°C for 5 hours, the reaction product After filtration, washing and distillation, 2-ethyl methacrylate (CEMA) was obtained;
[0034] B. Add 1mmol 4-bromomethylbenzophenone, 50mmol hydroxyethyl methacrylate (HEMA), 10mmol 2-ethyl methacrylate (CEMA), 1mmol ethylene bromide to the round bottom flask Copper, 1mmol pentamethyldiethylenetriamine and 6.0g toluene solution, the reaction system was subjected to liquid nitrogen freezing-vacuumizing-argon filling-thawing repeated operation 3 times, and sealed after 10 minutes of argon gas. The reaction was carried out at 20°C for 5 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, wash the pr...
Embodiment 2
[0039] A method for preparing a hydrophobic porous composite membrane, comprising the following steps:
[0040] (1) A. Add 10mmol hydroxyethyl acrylate to the round bottom flask, then add 10ml pyridine, slowly add 15mmol cinnamoyl chloride dropwise, keep it at 0°C for 2 hours, then raise the temperature to 25°C for 5 hours, and filter the reaction product , washing and distillation to obtain ethyl acrylate-2-cinnamate (CEA);
[0041]B. Add 1mmol 4-bromomethylbenzophenone, 50mmol acrylamide, 30mmol 2-ethyl cinnamate (CEA), 1mmol cuprous bromide, 1mmol pentamethyldiethylenetri Amine and 6.0g toluene solution, the reaction system was subjected to liquid nitrogen freezing-vacuumizing-argon filling-thawing repeated operation 3 times, and sealed after 10 minutes of argon gas. The reaction was carried out at 20°C for 5 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, and wash the precipitate to obtain the block copolymer PCEA-b-PAM of polyacryli...
Embodiment 3
[0046] A method for preparing a hydrophobic porous composite membrane, comprising the following steps:
[0047] (1) A. Add 10mmol hydroxyethyl methacrylate to the round bottom flask, then add 10ml pyridine, slowly add 15mmol cinnamoyl chloride dropwise, keep it at 0°C for 2 hours, then raise the temperature to 25°C for 5 hours, the reaction product After filtration, washing and distillation, 2-ethyl methacrylate (CEMA) was obtained;
[0048] B. Add 1mmol 4-bromomethylbenzophenone, 50mmol acrylonitrile, 200mmol 2-cinnamic ethyl methacrylate (CEMA), 1mmol cuprous bromide, 1mmol pentamethyl dibenzophenone to the round bottom flask Ethylenetriamine and 6.0 g toluene solution, the reaction system was subjected to liquid nitrogen freezing-vacuumizing-argon filling-thawing repeated operation 3 times, and sealed after 10 minutes of argon gas. The reaction was carried out at 20°C for 5 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, and wash the ...
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