The casting solution is composed of PVDF6020, PEG-400, LiCl and DMAc. The first coagulation bath uses isopropanol, and the second coagulation bath uses deionized water. But when I tried to remove the film from the glass plate, it was found that the film was delamination. After tearing off the film on the surface, there is still unformed PVDF underneath.Thank u all.