3D printable piezoelectric composites manufactured via scalable and sustainable solvent-free multi-extrusion process

Smart Materials and Structures, Journal Year: 2025, Volume and Issue: 34(2), P. 025028 - 025028

Published: Jan. 3, 2025

Abstract The study presents the development of 3D printable lead-free particulate piezocomposites by implementing a solvent-free multi-extrusion process (MEP) to address scalability limitations and safety concerns solvent-based processing commonly used with highly resilient fluoropolymer polyvinylidene fluoride (PVDF) its copolymers (e.g. hexafluoropropylene (HFP)). Composite filaments PVDF-HFP ferroelectric barium titanate (BTO) particles at 20, 40 60 wt% were manufactured for fused filament fabrication (FFF) applying melt-based consisting effectively composed multiple extrusion granulation cycles. results from TGA, DSC, FTIR, XRD, EDS-SEM tensile tests indicate that physical mechanical properties re-extruded printed are largely preserved. ensures homogeneous BTO dispersion within consistently piezocomposites, which demonstrate satisfactory levels piezoresponse flexibility together filler-reinforcing high-field poling capabilities. FFF-printed tested higher strain rates (up 0.17 s −1 ) exhibit 30%–40% increase in strength expense reduced ductility. Brief thermal 80 °C 20 kV mm is observed improve coefficient d 33 through more effective polarization compared room-temperature 7.3 pC/N measured 40/60 PVDF-HFP/BTO). Thermal also enhances stability minimizing depolarization ( decay) regardless duration. Increase content stronger dependence on field, temperature duration, as well weaker ductility characteristics rate. MEP approach environmentally economically sustainable manufacturing method accessible wide FFF user community. It scalable high-throughput production functional composites based thermally resistant materials enable printing customizable piezoelectric sensing devices.

Language: Английский

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Unidirectional Polyvinylidene/Copper-Impregnated Nanohydroxyapatite Composite Membrane Prepared by Electrospinning with Piezoelectricity and Biocompatibility for Potential Ligament Repair

Polymers, Journal Year: 2025, Volume and Issue: 17(2), P. 185 - 185

Published: Jan. 14, 2025

Ligament tears can strongly influence an individual’s daily life and ability to engage in physical activities. It is essential develop artificial scaffolds for ligament repairs order effectively restore damaged ligaments. In this experiment, the objective was evaluate fibrous membranes as repair. These were created through electrospinning using piezoelectric polyvinylidene fluoride (PVDF) composites, which contained 1 wt.% 3 of copper-impregnated nanohydroxyapatite (Cu-nHA). The proposed electrospun membrane would feature aligned fiber structure achieved high-speed roller stretching, mimics properties biomimetic Nanoparticles Cu-nHA had been composited into PVDF enhance pirzoelectric β-phase crystallines. study assessed physicochemical properties, antibacterial activity, biocompatibility vitro. A microstructure analysis revealed that composite exhibited a bionic with fibers resembling human performance experimental group containing significantly improved 25.02 ± 0.68 V/g·m−2 compared pure at 18.98 1.18 V/g·m−2. Further enhancement by 31.8% manipulating semicrystalline structures. Antibacterial cytotoxicity tests showed inherited nanoparticles without causing cytotoxic reactions. Tensile membrane’s flexibility strain adequate use particular, mechanical two groups enhanced those group. favorable flexible are highly beneficial tissue regeneration. This successfully developed PVDF/Cu-nHA biocompatible, unidirectional potential applications repair scaffolds.

Language: Английский

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Ultra-high electrostriction and ferroelectricity in poly (vinylidene fluoride) by ‘printing of charge’ throughout the film

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 16, 2025

Electrostriction is an important electro-mechanical property in poly (vinylidene fluoride) (PVDF) films, which describes the proportional relation between electro-stimulated deformation and square of electric field. Generally, traditional methods to improve electrostriction PVDF either sacrifice other crystalline-related key properties or only influence minimal regions around surface. Here, we design a unique electret structure fully exploit benefits internal crystal films. Through 3D printing charged ink, have obtained best electrostrictive ferroelectric among PVDF-based materials so far. The optimized coefficient M33 (324 × 10-18 m2 V-2) 104 times that normal piezoelectric constant d33 (298 pm V-1) close 10 its limit. proposed bottom-up approach 'print charge' open up new way adapt electroactive polymers smart devices systems.

Language: Английский

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Dual-Controlled Piezoelectric Composite Film with Enhanced Crystallinity and Defect-Free via Solvent Vapor Treatment

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110705 - 110705

Published: Jan. 1, 2025

Language: Английский

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High-Performance Mechano-Sensitive Piezoelectric Nanogenerator from Post-Treated Nylon-11,11 Textiles for Energy Harvesting and Human Motion Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 25, 2025

Piezoelectric polymer textiles offer distinct advantages in the fabrication of wearable nanogenerators (NGs). One effective strategy to enhance output capacity NGs is modulate piezoelectric performance textiles. This paper focuses on further improving properties nylon-11,11 through post-drawing and annealing treatments. We elucidate evolution morphology ferroelectric phase submicron/nanoscale fibers during post processing as well corresponding changes performance. The drawing process primarily enhances orientation crystalline reduces fiber diameter, while more effectively promotes crystal size crystallinity. Afterward, we propose an optimal postdrawing assisted-electrostatic spinning process. Under synergistic effects these post-treatments, remanent polarization (Pr) textile increased 4.7 times that untreated textile, resulting amplified outputs. voltage, current, power density prepared PENG reached 21.5 V, 800 nA, 1.88 mW·m-2 (80 MΩ), respectively. Notably, at pressures exceeding 8 kPa, mechano-voltage current sensitivity high 266 mV/kPa 13.99 nA/kPa, respectively, which extraordinary compared other comparable nylon-based triboelectric NGs. Furthermore, investigated potential application biomechanical energy harvesting human movement monitoring. Experiments demonstrated its effectiveness powering light bulbs, tracking walking status, monitoring finger/hand/wrist gestures.

Language: Английский

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