fig14

Figure 14. Synergistic mechanism of C-F and C-Cl bonds in enhancing the tribo-electric performance of fluorinated polymers. (A) Schematic of the chlorine plasma process in the treatment of fluorinated polymers; (B) Different cases of Cl substitution in PVDF-CTFE (PC) when it is treated by chlorine plasma; (C) Charge decomposition analysis of the impact of different molecular fragment structures on the frontier orbitals of the chlorine plasma-treated PC (PC-Cl); (D and E) XPS spectra of PC-Cl samples treated for different durations; (F)The corresponding surface Cl:F atomic ratio, (G) charge density and (H) charge keeping rate of the PC-Cl samples treated for different durations of chlorine plasma^[146]. Reproduced from Ref.^[146] with open access from Springer Nature, licensed under CC BY-NC-ND, no modifications to original figure. XPS: X-ray photoelectron spectroscopy; PVDF-CTFE: poly(vinylidene fluoride-co-chlorotrifluoroethylene).