Patent ID: 10227462

Abstract:
The invention pertains to a process for manufacturing a fluoropolynner film comprising a fluoropolymer hybrid organic/inorganic composite, said process comprising the following steps: (i) providing a mixture of: —at least one fluoropolymer [polymer (F)]; —at least one metal compound [compound (M)] having formula: X4-mAYm wherein m is an integer from 1 to 4, A is a metal selected from the group consisting of Si, Ti and Zr, Y is a hydrolysable group and X is a hydrocarbon group, optionally comprising one or more functional groups; —a liquid medium consisting essentially of at least one ionic liquid (IL) and, optionally, at least one additive (A); —optionally, at least one electrolytic salt (ES); and —optionally, at least one organic solvent (S); (ii) hydrolyzing and/or polycondensing said compound (M) to yield a liquid mixture comprising fluoropolymer hybrid organic/inorganic composite comprising inorganic domains and incorporating said liquid medium; (iii) processing a film from the liquid mixture obtained in step (ii); and (iv) drying and then, optionally, curing the film obtained in step (iii) for obtaining the fluoropolymer film. The invention also pertains to the fluoropolymer film obtained from said process and to use of said fluoropolymer film in electrochemical and photo-electrochemical devices.