Development of highly flexible PVDF-TiO2 nanocomposites for piezoelectric nanogenerator applications

Kulkarni, Nikhil Dilip; Kumari, Poonam

doi:10.1016/j.materresbull.2022.112039

Cited by 46 publications

(24 citation statements)

References 51 publications

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“…have also been used for acoustic sensing. [116,117] PVDF composite NFs with 0.5 wt% of TiO 2 NPs increased the 𝛽-phase content (≈93%) and enhanced sensing performance of nearly 17.5 V of peak-to-peak open circuit voltage at 90 dB of SPL. [100] In a recent study, the introduction of Ag 2 CO 3 facilitated the conversion of the 𝛼-phase to the semi-electroactive 𝛾-phase, which obtained the maximum value of 93% at 0.5 wt% of the filler concentration.…”

Section: Acoustic Sensingmentioning

confidence: 99%

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Chatterjee

Das

Saha

et al. 2023

Advanced Sensor Research

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Piezoelectric self‐powered sensors are promising platforms for wearable portable devices. Poly(vinylidene fluoride) (PVDF) and its copolymer derivatives are extensively explored as a soft piezoelectric material owing to their high piezoelectric coefficient, chemical thermal stability, biocompatibility, lightweight, and excellent flexibility. It is proved that the dominance of the electroactive (EA) β‐phase crystals versus the non‐electroactive α‐phase crystals is one of the key parameters to obtaining high piezoelectric performance of PVDF. Conventional methods, such as mechanical stretching, electrical poling, and high‐temperature annealing, are investigated to enhance the fraction of the β‐phase. Recently, embedding nanoscale fillers in the PVDF matrix has been investigated to further increase the β‐phase fraction and achieved considerable advances. The introduction of nanofillers is also advantageous in terms of improving the electrical conductivity and dielectric properties of PVDF, which are not readily obtained through conventional methods. This review introduces the principles of EA phase transformation in the presence of nanofillers and summarizes recent advances achieved by introducing various fillers, such as perovskites, oxide semiconductors, and 2D chalcogenides. The potential sensor applications of the PVDF nanocomposites responding to temperature, light, acoustic, and mechanical stimuli are reviewed. This review ends with the outlook of this new approach.

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Section: Acoustic Sensingmentioning

confidence: 99%

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Chatterjee

Das

Saha

et al. 2023

Advanced Sensor Research

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“…The peaks at 18.23 and 20.23 confirms the presence of α (020) and β (200) phases, respectively. 22 Electroactive β phase is essential for piezo response of PVDF matrix. 12 It can be observed from Figure 3 that, β phase intensity increases up to 5 wt.% of BMP reinforcement followed by reduction at higher loading.…”

Section: Xrd Analysismentioning

confidence: 99%

“…However, some of the piezoelectric ceramics mentioned are toxic, highly brittle, and non-biocompatible, which limits their use in nanogenerators and flexible electronics. 22 Moreover, improper disposal of these materials can result in serious ecological degradation. Therefore, it is necessary to switch the focus toward developing energy scavenging devices made of naturally available biocompatible piezoelectric materials.…”

Section: Introductionmentioning

confidence: 99%

The development of a low‐cost, sustainable bamboo‐based flexible bio composite for impact sensing and mechanical energy harvesting applications

Kulkarni

Saha

Kumari

2023

J of Applied Polymer Sci

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An increasing trend in creating materials with a greater extent of sustainability from an ecological and financial perspective involves usage of bio resources and industrial residues. In this paper, leftover bamboo micro particles (BMP) from bamboo factories were collected and used as fillers with polyvinylidene fluoride (PVDF) matrix in varying concentrations (1, 3, 5, 7, and 9 wt.%) to fabricate low-cost composite films using solvent casting route for mechanical energy harvesting purpose. Out of the prepared samples, PVDF with 5 wt.% BMP showed maximum electroactive phase content (82%), tensile strength (34.23 MPa), and piezoelectric voltage (6.5 V) among the untreated samples. PVDF with 5 wt.% BMP is then subjected to NaOH treatment for further enhancement in overall performance. PVDF with 5 wt.% treated BMP also showed 467% increment in output voltage and 235% increment in output current as compared to pure PVDF. The piezoelectric output voltage of PVDF with 5 wt.% treated BMP is then measured under impact loading conditions to determine its suitability as an impact sensor. A bamboo-based piezoelectric impact sensor that is highly sensitive and cost-effective opens enormous possibilities for sustainability and circular economies.

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“…Figure 5a,b display the SEM images of PAN/CNT-3/MX-1 nanofibers, the composite nanofibers had a rough surface, the surface roughness will enhance frictional, thus increased the planner zigzag conformation content, [47][48][49][50][51] Figure 5c is the EDS image of PAN/CNT-3/MX-1 nanofibers, the five elements were distributed in the nanofibers; Ti and F originated from MXene, the uniform distribution of these elements illustrated the uniform distribution of MXene in PAN nanofibers, theoretically, the element O came from MWCNT and MXene, a fibrous elemental distribution was observed in the O elemental distribution spectra, while a fibrous elemental distribution could not be observed in the Ti elemental distribution spectra, it indicated that the source of the O element included MWCNT in addition to MXene, thus confirming the uniform distribution of MWCNT and MXene in nanofibers. In summary, MWCNT and MXene improved the conductivity and surface microstructure, while EDS spectra indicated that PAN contained MWCNT and MXene.…”

Section: Sem Analysismentioning

confidence: 99%

“…Figure 10 displays the stress-strain curves of films; as shown in Table 1, PAN itself had a Young's modulus of 6.10 MPa, after adding 3% CNT, the Young's modulus reached 22.00 MPa, but decreased in strain, it may be that CNT led to defects inside the material, resulting in a decrease in mechanical properties [51][52][53] ; after adding 1% MXene, the strain is almost the same as the original film that without any filler and the Young's modulus increased to 9.52 MPa, it may be that the MXene and PAN have good compatibility, with the help of MXene, CNT was well distributed in PAN. 45…”

Section: Mechanical Property Analysismentioning

confidence: 99%

Flexible piezoelectric sensor based on polyacrylonitrile/MWCNT/MXene composites films for human physiological health detection

Zhang,

Wang,

Huang

et al. 2023

J of Applied Polymer Sci

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Flexible piezoelectric sensors combine advantages including low‐cost, flexibility, multi‐functions, present a huge market prospect. In this research, multiwalled carbon nanotubes (MWCNT)/MXene/polyacrylonitrile (PAN) piezoelectric composites films for flexible piezoelectric sensors are fabricated by electrospinning technology, the planar zigzag conformation content of 97.98% in PAN composite fibers is achieved owing to the synergistic effect of MWCNT and MXene, the synergistic effect of MWCNT and MXene nanoparticles can also efficiently promote the mechanical performance and piezoelectric output. The piezoelectric sensor exhibits fast response time (10.21 ms), a possible mechanism is proposed to explain the improvement of piezoelectric effect. The sensor can measure human pulse, distinguish human movements, the fabricated sensor has broad practical value in the field of healthcare, its' use can contribute to stable and accurate measurements of physiological parameters, enabling applications in various healthcare and fitness monitoring scenarios.

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Development of highly flexible PVDF-TiO2 nanocomposites for piezoelectric nanogenerator applications

Cited by 46 publications

References 51 publications

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

The development of a low‐cost, sustainable bamboo‐based flexible bio composite for impact sensing and mechanical energy harvesting applications

Flexible piezoelectric sensor based on polyacrylonitrile/MWCNT/MXene composites films for human physiological health detection

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