Ferroelectric polarization of β-polyvinylidene fluoride as control and mitigator of infectious organisms

Rengan, Aravind Kumar; M, Sabarigresan; Jogdand, Anil; Yadav, Dokkari Nagalaxmi; Rengan, Aravind Kumar; Ramadurai, Ranjith

doi:10.1016/j.mtcomm.2022.104067

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Nevertheless, as shown in Figure 7d, P(VDF‐TrFE) 65/35 mol% has the lower maximum and remnant polarization values ( P s ~ 13.9 μC cm − and P r ~ 10.4 μC cm −2 in Figure 7c) than those of 80/20 mol% ( P s ~ 15.2 μC cm −‐2 and P r ~ 11.3 μC cm −2 in Figure 7a) and 75/25 mol% ( P s ~ 14.7 μC cm −‐2 and P r ~ 10.7 μC cm −2 in Figure 7b) under electrical field of 200 MV m −1 , respectively. Moreover, compared with ice‐water cooling samples, the P–E loops of annealing P(VDF‐TrFE) films gradually tend to rectangular shape and the coercivity field strength increases correspondingly with the increase of electric field, further indicating annealing favors the content of ferroelectric β phase 47–52 . The reason is that 140°C nearing T C of P(VDF‐TrFE) provides sufficient time for the arrangement of all‐trans molecular chains within the molecules.…”

Section: Resultsmentioning

confidence: 99%

Disclosing the dependencies of ferroelectric and piezoelectric performances on crystalline states of P(VDF‐TrFE) films by molecular dynamics simulations

Shi,

Xia,

Wang

et al. 2024

J of Applied Polymer Sci

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We present a molecular dynamics simulation method including x‐ray diffractometer pattern calculation, mean square displacement (MSD), and nonbonding energy distribution (NED) to disclose the dependencies of condensed structure on its crystalline process of the poly(vinylidene fluoride‐trifluoroethylene) (P(VDF‐TrFE)) films. For comparison, the P(VDF‐TrFE) solution is casted into the films, and followed that different thermal processes are performed to fabricate the crystalline states of the films. Simulation and experimental results have good consistency, indicating that high temperature annealing can effectively promote all‐trans β phase in the crystal region of P(VDF‐TrFE). As such, P(VDF‐TrFE) 80/20 mol% annealing at 140°C shows a higher MSD (~27.5 Å2) and a faster reducing rate of NED than that of other films, contributing to a large maximum polarization (Ps) of ~15.5 μC cm−2, high a remnant polarization (Pr) of ~11.8 μC cm−2, and an attractive piezoelectric strain coefficient (d33) of −27.1 pC N−1 under 200 MV m−1, respectively, and providing a reference for the applications of P(VDF‐TrFE) in flexible sensors, actuators, transducers, and so forth.

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Section: Resultsmentioning

confidence: 99%