Thermo-electromechanical Behavior of Piezoelectric Nanofibers

Baniasadi, Mahmoud; Xü, Zhe; Hong, Soon-Dal; Naraghi, Mohammad; Minary‐Jolandan, Majid

doi:10.1021/acsami.5b10073

Cited by 77 publications

(90 citation statements)

References 68 publications

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“…Similar to PVDF, PVDF‐TrFE is a semicrystalline polymer with at least four polymorphs (α, β, γ, and δ) . The content and structure of crystalline β phase is responsible for its piezoresponse magnitude . However, homopolymer PVDF generally crystallizes in nonpolar α phase, whereas copolymer PVDF‐TrFE readily crystallizes into polar β phase regardless of processing method .…”

Section: Introductionmentioning

confidence: 99%

“…The content and structure of crystalline β phase is responsible for its piezoresponse magnitude . However, homopolymer PVDF generally crystallizes in nonpolar α phase, whereas copolymer PVDF‐TrFE readily crystallizes into polar β phase regardless of processing method . The introduction of TrFE co‐monomer into VDF sterically hinders the formation of a trans‐gauche‐trans‐gauche ( tg + tg − ) configuration .…”

Section: Introductionmentioning

confidence: 99%

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Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Wang

Huang

et al. 2020

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Herein, an all‐solid‐state sequential self‐organization and self‐assembly process is reported for the in situ construction of a color tunable luminous inorganic/polymer hybrid with high direct piezoresponse. The primary inorganic self‐organization in solid polymer and the subsequent polymer self‐assembly are achieved at high pressure with the first utilization of piezo‐copolymer (PVDF‐TrFE) as the host matrix of guest carbon quantum dots (CQDs). This process induces the spontaneous formation of a highly ordered, microscale, polygonal, and hierarchically structured CQDs/PVDF‐TrFE hybrid with multicolor photoluminescence, consisting of very thermodynamic stable polar crystalline nanowire arrays. The electrical polarization‐free CQDs/PVDF‐TrFE hybrids can efficiently harvest the environmental available kinetic mechanical energy with a new large‐scale group‐cooperation mechanism. The open‐circuit voltage and short‐circuit current outputs reach up to 29.6 V cm−2 and 550 nA cm−2, respectively. The CQDs/PVDF‐TrFE–based hybrid nanogenerator demonstrates drastically improved durable and reliable features during the real‐time demonstration of powering commercial light emitting diodes. No attenuation/fluctuation of the electrical signals is observed for ≈10 000 continuous working cycles. This study may offer a new design concept for progressively but spontaneously constructing novel multiple self‐adaptive complex inorganic/polymer hybrids that promise applications in the next generation of self‐powered autonomous optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Wang

Huang

et al. 2020

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“…found the elongation at break of electrospun PCL and PVDF-TrFe fibers to be 170% and 150%, respectively. 26,27 Medeiros et al . produced PAN nonwoven mats with an elongation at break of 26%.…”

Section: Resultsmentioning

confidence: 99%

Investigation of nanoyarn preparation by modified electrospinning setup

Levitt

Knittel

Vallett

et al. 2017

J of Applied Polymer Sci

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Higher ordered structures of nanofibers, including nanofiber-based yarns and cables, have a variety of potential applications, including wearable health monitoring systems, artificial tendons, and medical sutures. In this study, twisted assemblies of polyacrylonitrile (PAN), polyvinylidene fluoride trifluoroethylene (PVDF-TrFE), and polycaprolactone (PCL) nanofibers were fabricated via a modified electrospinning setup, consisting of a rotating cone-shaped copper collector, two syringe pumps, and two high voltage power supplies. The fiber diameters and twist angles varied as a function of the rotary speed of the collector. Mechanical testing of the yarns revealed that PVDF-TrFe and PCL yarns have a higher strain-to-failure than PAN yarns, reaching 307% for PCL nanoyarns. For the first time, the porosity of nanofiber yarns was studied as a function of twist angle, showing that PAN nanoyarns are more porous than PCL yarns.

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“…[41,42] The mixture was stirred by a hotplate/stirrer for 12 h at 70 C. The sintered ceramic scaffold was cut into smaller pieces by a diamond saw.…”

Section: Preparation Of P(vdf-trfe) Solution and Compositementioning

confidence: 99%

Lamellar Ceramic Semicrystalline‐Polymer Composite Fabricated by Freeze Casting

et al. 2017

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Understanding the role of ductile polymer phase in mechanical behavior of bioinspired hybrid composites is an important step toward development of materials with damage tolerant properties. Herein, the authors report on fabrication and characterization of a bioinspired lamellar composite by incorporation of a semicrystalline polymer into a freeze casted scaffold. The elastic modulus and ductility of the polymer phase can be changed by more than three and 55 times, respectively, in addition to 42 folds decrease in modulus of toughness, by thermal annealing post-processing, after infiltration into the freeze casted ceramic scaffold. The results show that although polymer phase affects the fracture toughness and flexural behavior of the composite, the drastic changes in mechanical properties of the polymer phase has only marginal effect in the resulted properties of the composite. The authors use in situ SEM experiments and finite element simulation to investigate the deformation mechanism and the effect of the polymer phase on the distribution of stress in the fabricated composites.

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Thermo-electromechanical Behavior of Piezoelectric Nanofibers

Cited by 77 publications

References 68 publications

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Carbon Nanolights in Piezopolymers are Self‐Organizing Toward Color Tunable Luminous Hybrids for Kinetic Energy Harvesting

Investigation of nanoyarn preparation by modified electrospinning setup

Lamellar Ceramic Semicrystalline‐Polymer Composite Fabricated by Freeze Casting

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