fig3

Figure 3. (A) Stress-strain curves; (B) flexibility test; (C) TGA curves; (D) thermal shrinkage of PP/PE/PP and PF-70(IL-EC) membrane. EC: Ethylene carbonate; IL: ionic liquid; PAES-g-2PEG: poly(arylene ether sulfone)-graft-dual poly(ethylene glycol); PP/PE/PP: polypropylene/polyethylene/polypropylene; TGA: thermogravimetric analyzer.