Fig. 4: Piezoelectricity of PEG/SIS combined film.
a Piezo-response of PEG/SIS combined films with different driving voltages. b Linear relationship between the piezo-response and the driving voltage. The slope presents the piezoelectric coefficient. Right data presented as mean ± SD, n = 256. Data are linearly fitted. c Experimental setup for measuring piezo-response of PEG/SIS combined film. d The macro-piezoelectricity of PEG/SIS combined films with different PEG contents. Data presented as mean ± SD, n = 18. e Relative permittivity of PEG/SIS combined films with different PEG contents. The inset shows the positions that measured in the multi-point test. Data presented as mean ± SD, n = 6. f k33 and g33 of PEG/SIS combined films with different PEG contents. g Comparison of g33 between PEG/SIS combined film and common piezoelectric materials. PAII, TGS, LCR, PDMS, and T-SHR represent polyamide 11, triglycine sulfate, polydimethylsiloxane, and the 2,2,6,6-tetramethylpiperidine-1-oxyl oxidation system, respectively. h Piezoelectric coefficient of PEG/SIS combined films with 6.82 wt.% PEG content at different temperatures. i Piezoelectric coefficient of PEG/SIS combined film with 6.82 wt.% PEG at different frequencies. The dots represent the average piezoelectric coefficients measured at various time points over 60 days, with the relevant data sourced from Supplementary Fig. 18. Data presented as mean ± SD, n = 12. Data are linearly fitted. j Stability of piezoelectric coefficient of PEG/SIS combined films with 6.82 wt.% PEG content at 105 Hz over 60 days. Data are linearly fitted with a confidence interval of 95% (P < 0.05).
