Piezoelectric properties of PVDF/MWCNT nanofiber using near-field electrospinning

Flexible Pressure Sensors Based on Screen-Printed P(VDF-TrFE) and P(VDF-TrFE)/MWCNTs

“…The composites so obtained are used to measure a single contact event upon change in resistance of the bulk nanocomposite layer, as shown in Fig.1 (b) [1,[29][30][31]. The combination of P(VDF-TrFE) and MWCNTs, presented here, allows measuring the dynamic as well as static pressures, as presence of P(VDF-TrFE) helps in measuring the dynamic component of the stimuli and MWCNTs allows measurement of the static components of the stimuli [9,10,[32][33][34][35]. Due to the high aspect ratio of MWCNTs as compared to metallic conductive fillers, the MWCNTs in P(VDF-TrFE) also results in lower percolation threshold, which makes it easy print the solution as it has medium viscosity.…”

“…These include spin coating, thermally drawn functional fibers, micro-machined mold transfer, single and multiplayer inkjet printers and electrospinning processes [14,15,34,36,37]. The issues with most frequently used techniques such as spin coating and inkjet printing are the poor processing speed and overlay registration accuracy, especially in multilayer structures.…”

Gold Nanoparticle Doped PVDF Nanofiber Preparation of Concurrently Harvesting Light and Mechanical Energy

“…These materials combine structural flexibility, chemical stability with ease of processing [19] and simplicity in device designing. Especially, polyvinylidene fluoride (PVDF) has a relatively high piezoelectric property owing to its polar crystalline structure, consisting of at least five different crystalline forms (namely α, β, γ, δ and ε) [20,21] , among which β phase is primary for its piezoelectric activity. On the other hand, electrospinning is an effective way on β phase formation which combines electrical poling and uniaxial stretching in one step [22] .…”

Development of Piezoelectric Fibers in Smart Patch by Near-Field Electrospinning Method with Closed-Loop Motor Control

“…PVDF is a semicrystalline polymer consisting of four crystalline phases (α, β, γ, and δ). (1)(2)(3) PVDF with a nonpolar α phase is most commonly found in commercially available films. Since the dipole moments in this phase have a random orientation, they cancel each other out.…”