Improved pyroelectric effect in PVDF/BaTiO3 composite flexible films mediated by enhanced β – PVDF phase formation

Structural, Mechanical, and Barrier Properties of the Polyvinylidene Fluoride-Bacterial Nanocellulose-Based Hybrid Composite

“…The FT-IR technique has been used for the identification of different crystalline phases present in PVDF. Characteristic absorbance bands of PVDF observed at 485 cm −1 , 530 cm −1 , 611 cm −1 , 761 cm −1 , 766 cm −1 and 795 cm −1 are correlated to the trans-gauche TGTG’ conformation of PVDF α-phase [ 45 ], while characteristic absorption bands suggesting the presence of the β phase are located at wavelengths 510 cm −1 , 838 cm −1 , 873 cm −1 and 1234 cm −1 [ 46 , 47 ]. The bands at 510 cm −1 , 838 cm −1 , 873 cm −1 , and 1234 cm −1 that appeared in each composite film signify the formation of the β-phase (all-trans TTTT conformation) [ 45 , 48 ].…”

“…Characteristic absorbance bands of PVDF observed at 485 cm −1 , 530 cm −1 , 611 cm −1 , 761 cm −1 , 766 cm −1 and 795 cm −1 are correlated to the trans-gauche TGTG’ conformation of PVDF α-phase [ 45 ], while characteristic absorption bands suggesting the presence of the β phase are located at wavelengths 510 cm −1 , 838 cm −1 , 873 cm −1 and 1234 cm −1 [ 46 , 47 ]. The bands at 510 cm −1 , 838 cm −1 , 873 cm −1 , and 1234 cm −1 that appeared in each composite film signify the formation of the β-phase (all-trans TTTT conformation) [ 45 , 48 ]. Structurally and spectroscopically, the β- and γ-phases exhibit bands appear at same positions, 510 cm −1 and 838 cm −1 , posing a challenge for distinguishing them.…”

Studies on PVDF/ferrite composite films on flexible substrates for pyroelectric energy conversion

“…For comparison studies, PVDF films that included 5, 10, 15, and 20 wt% MnFe 2 O 4 and NiFe 2 O 4 were created and labeled as w/v% MF and NF, respectively. 12,23,24…”