I was wondering if anyone could help me about it. I have some problem with drying step of sPEEK synthesis because somehow above 48 hr drying,solvent almost evaporates and membrane sticks on the glass and the peeling procedure gets pretty hard.
that would be awesome if i had your helpful experiences.
Regards
Wow! The boiling point of NMP is high. Therefore if you are leaving the item out (or better in the fume hood!) to dry then it will take a very long time to dry. 48 hours does not surprise me. Quite often NMP is used in formulations because it does dry to slowly. I can suggest two things:
1. try evaporating under vacuuum (lower pressure = low boiling point). If you use a vacuum pump then you will need to think about protection for the pump if it is an oil lubricated pump. NMP will damage the mineral oil in the pump leading to failure.
2. use a different solvent to wash the NMP out of the membrane, a solvent with a lower boiling point, one that evaporates easily. There are many, but I don't know what would work with your downstream process.
Best.
Rob