Feb 15, 2022 · The obtained dry membrane was made into wafer with a diameter 19 mm by a tablet machine and stored in an argon filled glove box (H 2 O . 1 ppm, O 2 1 ppm). Finally, the membranes were soaked into LE for 30 min to obtain GPE. GPE of different POSS was recorded as GHP-0%, GHP-5%, GHP-10% and GHP-15%, respectively. 2.5.