Effects of nano-sized BaTiO3 on microstructural, thermal, mechanical and piezoelectric behavior of electrospun PVDF/BaTiO3 nanocomposite mats

Kubin, Mateja; Makreski, Petre; Zanoni, Michele; Gasperini, Leonardo; Selleri, Giacomo; Fabiani, Davide; Gualandi, Chiara; Bužarovska, Aleksandra

doi:10.1016/j.polymertesting.2023.108158

Cited by 17 publications

(7 citation statements)

References 36 publications

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“…In the formula above, the melting enthalpy (Δ H m ) of the PVDF-matrix polymer samples (J/g) is obtained by computing the integral melting peak area from the DSC curve and Δ H m 0 denotes the melting enthalpy of 100% crystallized PVDF, whose value is 104.7 J g –1 in theory, and x symbolizes the weight fraction of PVDF-HFP in total mass …”

Section: Methodsmentioning

confidence: 99%

“…In the formula above, the melting enthalpy (ΔH m ) of the PVDFmatrix polymer samples (J/g) is obtained by computing the integral melting peak area from the DSC curve and ΔH m 0 denotes the melting enthalpy of 100% crystallized PVDF, whose value is 104.7 J g −1 in theory, and x symbolizes the weight fraction of PVDF-HFP in total mass. 21 Thermogravimetric analysis (TGA) was performed to compare the thermal durability of electrolyte samples by utilizing a TGA Q50 (TA Instruments) from ambient temperature to 800 °C under N 2 atmosphere flow with a heating rate of 10 °C min −1 . To test the mechanical properties of electrolyte films, the obtained electrolyte films were cut into a dumbbell-shaped with a scalpel.…”

Section: Synthesis Of Ampslimentioning

confidence: 99%

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Regulating Conductive Copolymerization Networks in the Polymer Electrolyte for High-Performance Quasi-Solid-State Lithium–Metal Batteries

Yi,

Chen,

Liu

et al. 2023

ACS Appl. Energy Mater.

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Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Ampslimentioning

confidence: 99%

Regulating Conductive Copolymerization Networks in the Polymer Electrolyte for High-Performance Quasi-Solid-State Lithium–Metal Batteries

Yi,

Chen,

Liu

et al. 2023

ACS Appl. Energy Mater.

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“…where σ represents stress in MPa, ρ m is the density of the material (mg/mm 3 ), F is the applied force (N), m is the specimen mass (mg), and L is the initial length of the membrane (mm), with density corrections based on material weight percentages. 29 Young's modulus (E) was calculated from the slope of the initial linear part in the stress-strain curve. Additionally, ER was assessed through 20 stress-controlled cycles at 50% of the maximum tensile stress using a crosshead speed of 100 mm/min.…”

Section: Characterizationmentioning

confidence: 99%

Fabrication of in situ polymerized polyaniline‐based functional nanofibrous structures for flexible electromechanical devices

Khedewy,

Abd El‐Baky,

Hassan

et al. 2024

Polymers for Advanced Techs

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Recently, flexible electromechanical devices (EMDs) emerged as alternatives to rigid electronics, promoting polymeric materials over traditional semiconductors. This study develops EMDs using conductive nanofibrous membranes of thermoplastic polyurethane (TPU), polyaniline (PANI), and multi‐walled carbon nanotubes (MWCNTs) in various structures. The fabrication technique included the combination of electrospinning and in situ polymerization to create random and aligned conductive membranes. Morphological, mechanical, thermomechanical, and electrical characterizations were conducted to assess their potential in EMDs applications. Mechanical testing revealed that, in comparison to aligned pure TPU mats, aligned TPU/PANI and TPU/MWCNTs/PANI membranes exhibited maximum strains of 26% and 19%, respectively. Meanwhile, randomly oriented mats, TPU/PANI and TPU/MWCNTs/PANI demonstrated maximum strains of 18% and 27%, respectively. Moreover, incorporating PANI and/or MWCNTs increased the Young's modulus. Thermogravimetric analysis showed thermal stability up to 250°C for all mats, with TPU/PANI mats demonstrating superior stability. Dynamic mechanical analysis revealed that PANI incorporation increased the storage modulus from 119 and 180 MPa to 2012 and 1367 MPa for aligned and random mats, respectively, compared with pure TPU mats. The combination of MWCNTs and PANI yielded moduli of 1501 and 1096 MPa, respectively. All conductive mats exhibited symmetric ohmic behavior, with conductivities varying based on orientation and composition. Specifically, TPU/PANI and TPU/MWCNTs/PANI mats exhibited conductivities of 0.83 and 1.78 S/cm for aligned mats, and 0.35 and 0.67 S/cm for random mats, respectively. Pure TPU, on the other hand, displayed a conductivity of 1.8 × 10−10 S/cm, indicating a significantly lower conductivity compared with the other mats.

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“…( 1 ) 40 , where m is the mass of the sample (measured in mg), ρ m is the material density, F is the force (measured in N), L is the initial length of the sample (measured in mm) and σ is the stress expressed in MPa. The density corrections of the samples were performed according to the weight percentage of the nanoparticles 41 . This type of stress calculation enables more realistic values compared to the standard approach, where the cross-section area of the sample is used.…”

Section: Experimental Workmentioning

confidence: 99%

Thermo-mechanical characterization of electrospun polyurethane/carbon-nanotubes nanofibers: a comparative study

Shaker,

Khedewy,

Hassan

et al. 2023

Sci Rep

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Creating ultrathin, mountable fibers from a wide range of polymeric functional materials has made electrospinning an adequate approach to producing highly flexible and elastic materials. In this paper, electrospinning was utilized to produce thermoplastic polyurethane (TPU) nanofibrous membranes for the purpose of studying their thermal and mechanical properties. Towards a study of the effects of fiber orientation and multi-walled carbon nanotubes (MWCNTs) as a filler on both mechanical and thermal characteristics of electrospun TPU mats, an experimental comparison was held between unidirectional and randomly aligned TPU and TPU/MWCNTs nanofibrous structures. The incorporation of MWCNTs into randomly oriented TPU nanofibers resulted in a significant increase in Young's modulus (E), from 3.9 to 7.5 MPa. On the other hand, for unidirectionally spun fibers, Young's modulus increased from 17.1 to 18.4 MPa upon the addition of MWCNTs. However, dynamic mechanical analysis revealed a different behavior. The randomly oriented specimens exhibited a storage modulus with a significant increase from 180 to 614 MPa for TPU and TPU/MWCNTs mats, respectively, and a slight increase from 119 to 143 MPa for unidirectional TPU and TPU/MWCNTs mats, respectively. Meanwhile, the loss modulus increased with the addition of MWCNTs from 15.7 to 58.9 MPa and from 6.4 to 12 MPa for the random and aligned fibers, respectively. The glass transition values for all the mats fell in the temperature range of – 60 to − 20 °C. The thermal degradation of the membranes was not significantly affected by the addition of MWCNTs, indicating that the mixing of the two constituents did not change the TPU’s polymer structure and that the TPU/MWCNTs nanocomposite exhibited stable thermal degradation properties.

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Effects of nano-sized BaTiO3 on microstructural, thermal, mechanical and piezoelectric behavior of electrospun PVDF/BaTiO3 nanocomposite mats

Cited by 17 publications

References 36 publications

Regulating Conductive Copolymerization Networks in the Polymer Electrolyte for High-Performance Quasi-Solid-State Lithium–Metal Batteries

Regulating Conductive Copolymerization Networks in the Polymer Electrolyte for High-Performance Quasi-Solid-State Lithium–Metal Batteries

Fabrication of in situ polymerized polyaniline‐based functional nanofibrous structures for flexible electromechanical devices

Thermo-mechanical characterization of electrospun polyurethane/carbon-nanotubes nanofibers: a comparative study

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