Neat membrane had been prepared and it is just fine. TiO2 was taken from new batch and all the chemicals were dried before using. Still pvdf did not dissolve and solution solidified
Please check the dissolution/mixing process step. Firstly try low weight percentage of TiO2 particle.If possible than please specify solvent and dope solution preparation step.
Previously the same batch had been prepared using 2wt% TiO2 and it dissolved. The solvent used was NMP. The dope solution was prepared in the sequence below: