15-08-2023 дата публикации
Номер: CN116585908A
Принадлежит:
The invention provides a process for preparing a PTFE hollow fiber membrane based on flat sheet membrane wrapping, and belongs to the technical field of hollow fiber membrane preparation, and the process comprises the following steps: step 1, wrapping: wrapping a PTFE flat sheet membrane on the outer wall of the PTFE hollow fiber membrane, step 2, sintering: carrying out heat treatment on the wrapped hollow fiber membrane at 300-400 DEG C, and step 3, modifying, soaking the wrapped and sintered membrane filaments in ethanol, taking out the wrapped and sintered membrane filaments, soaking the wrapped and sintered membrane filaments in a 0.5 wt% PVA solution for 2 hours, taking out the wrapped and sintered membrane filaments, soaking the taken-out membrane filaments in a 10% glutaraldehyde solution for 1 hour, taking out the soaked membrane filaments, cleaning the taken-out membrane filaments, and drying the cleaned membrane filaments to obtain the wrapped and modified PTFE hollow fiber membrane ...
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