Power characteristics of a 70/30 wt.% PVDF/PMMA film in roadway electricity generation

Boosting the electro-mechanical coupling of piezoelectric polyvinyl alcohol–polyvinylidene fluoride blends by dispersing nano-graphene platelets

“…According to table 1, the d 1r value for S1 is augmented by a factor of 89% in relation to that of S0, and, for S2, by a factor of 148%, compared with that of S1. It is worth noting that specimens S1 and S2 are competitive or superior to different literature values of neat piezo-active PVdF, as shown in table 2 [23,[35][36][37][38][39][40][41][42][43]. Literature values for the piezoelectric coefficient d 1r of neat PVdF vary from 1.19 to 37 pC N −1 depending on the processing method and environmental parameters such as temperature, crystallinity, stretch ratio, and poling conditions [11].…”

“…Literature values for the piezoelectric coefficient d 1r of neat PVdF vary from 1.19 to 37 pC N −1 depending on the processing method and environmental parameters such as temperature, crystallinity, stretch ratio, and poling conditions [11]. Therefore, the difference between the literature values [23,[35][36][37][38][39][40][41][42][43] and our experimental values (table 1) can be attributed primarily to the much lower concentration of PVdF in our material and, secondarily, to the simple and affordable procedure followed to obtain the composites. It is essential to point out that NGPs are randomly distributed into the blend, based on SEM inspection of the specimens.…”

“…Gregorio Jr and de Souza Nociti [22] observed that small concentrations of polymethylmethacrylate (PMMA) (10 wt% and 15 wt%) favored the β-phase crystallization in PVdF/PMMA blends obtained from a solution. Leppe-Nerey et al [23] showed that the β phase decreased as the PVdF content reduced in PVdF/PMMA films. Manna and Nandi [21] incorporated functionalized multi-walled carbon nanotubes (F-MWNTs) in PVdF using the solvent-casting method, and observed that the β phase increased with the increase of F-MWNT concentration.…”

“…In the literature, it has been reported that the addition of external nucleating agents, such as graphene [19,20], carbon nanotubes [21], or clay particles [22,23], can induce the formation of β-crystals in PVdF nanocomposites resulting in an improvement in piezoelectric performance. Abolhasani et al [19] observed that the addition of a small amount of graphene (0.1 wt%) significantly increases the β phase of graphene-reinforced PVdF composite nanofibers prepared using an electrospinning technique.…”

Force‐Induced Enhancement of Hydrophilicity of Individual Polymethyl Methacrylate Chain†

“…As one of the most famous polymers, polymethyl methacrylate (PMMA), a linear polymer with a carbon‐carbon (C‐C) backbone and ester carbonyl side groups, has been used for more than a century. [ 1 ] Since PMMA has many excellent mechanical features, such as high strength, great malleability and low density, it has been extensively applied to electrical appliances, [ 2 ] sensors, [ 3 ] optical components, [ 4 ] and architectures. [ 5 ] In recent decades, PMMA has also been widely used in the medical field due to its considerable hydrophilicity and biocompatibility.…”