Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(28), P. 10494 - 10503
Published: Jan. 1, 2024
The three-dimensional porous structure of the material is adjusted by adding perovskites, and a flexible pressure sensor constructed in “sandwich” to detect human facial expression, pulse, breathing, joint movement.
Language: Английский
ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(13), P. 7458 - 7467
Published: June 25, 2024
Nowadays, attractive progress has been made on flexible humidity sensors for multifunctional applications, yet most of them still suffer from intrinsic instability due to the device structure based substrates. Herein, high-performance were constructed using alkali metal halide doped polyvinylpyrrolidone (PVP)/polyvinylidene fluoride (PVDF) freestanding films. These films are prepared via a versatile thermally induced phase separation procedure with network-like porous structure. After doping salts MCl (M = Li, Na, K), sensing performance is highly improved, among which LiCl@PVP/PVDF film optimized one. In relative range 11–97% at room temperature, sensor exhibits high response (2.3 × 103), fast (10 s), small hysteresis (0.41%), and excellent repeatability. Notably, featured as fully self-supporting without assistance any substrate, readily tailorable that can be cut into different shapes, well bent certain angles, meanwhile almost maintains its significant decrease. Furthermore, enables demonstrate great potential in real-time noncontact diaper finger detection. This contribution provides practical candidate moisture monitoring gives insights fields electronics.
Language: Английский
Citations
4
Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 379, P. 115970 - 115970
Published: Oct. 10, 2024
Language: Английский
Citations
4
Crystals, Journal Year: 2025, Volume and Issue: 15(1), P. 94 - 94
Published: Jan. 20, 2025
Synchrotron microbeam X-ray diffraction was employed to investigate the local-scale structure and solid-state phase transformation within individual spherulites of poly(vinylidene fluoride) (PVDF). In thin, non-oriented films, PVDF crystallizes into α γ-phases, forming distinct spherulitic morphologies: large, banded α-spherulites smaller, irregular “mixed” dominated by γ-phase. For samples crystallized at high undercooling (160 °C), mixed primarily consisted γ-phase, with only a minor fraction α-lamellae localized spherulite boundaries. At higher crystallization temperatures (165 α-phase entirely absent from spherulites. High-temperature annealing induced initiating interface between α- γ-spherulites. The propagated radially along b-axis α-spherulite, while its characteristic morphology remained intact. Radial scanning an provided spatially resolved mapping structural transition α-spherulite micrometer scale, offering detailed insights mechanism impact on structure. fast crystal growth direction unaltered during transition, suggesting minimal material transport maintaining coherence.
Language: Английский
Citations
0
Chinese Journal of Aeronautics, Journal Year: 2025, Volume and Issue: unknown, P. 103423 - 103423
Published: Jan. 1, 2025
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(6), P. 9115 - 9124
Published: Jan. 30, 2025
Wearable temperature-sensitive electronic skin enables robots to rapidly detect environmental changes and respond intelligently, thereby reducing temperature-related mechanical failures. Additionally, this can measure record the temperature of external objects, broadening its potential applications in medical field. In study, we designed a thermally sensitive artificial ionic using liquids (ILs) as solvents carbon nanotubes (CNTs) conductive fillers. The incorporation ILs into polymer network enhances thermal stability, while CNTs establish dual conduction pathways (CNTs-CNTs CNTs-polymer chain segments), leading rapid response times only 16 s. initiation IL dissociation at elevated temperatures boosts carrier density, resulting substantial improvement sensitivity (5%/°C). Furthermore, displays remarkable self-healing properties (90%), extending lifespan practical applications. This kind stably sense wearer's body provide an ideal long-term stable new functional material for development human such robots.
Language: Английский
Citations
0
Acta Physica Sinica, Journal Year: 2025, Volume and Issue: 74(7), P. 0 - 0
Published: Jan. 1, 2025
Flexible piezoelectric materials can convert mechanical energy into electrical to power micro/nano electronic devices. In recent years, research technologies has revealed that molybdenum disulfide (MoS<sub>2</sub>) enhance the properties of composite materials. This paper presents fabrication a PAN/MoS<sub>2</sub> flexible nanofiber film sensor via electrospinning. The influence MoS<sub>2</sub> nanosheet content on performance films is systematically investigated, and morphology structure are characterized. results show uniformly distributed in films, zigzag conformation PAN molecular was enhanced with addition MoS<sub>2</sub>. As doping increases, shows trend first increasing then decreasing, reaching maximum value when 3.0 wt%. When increases from 0 wt% wt%, open-circuit output voltage 1.92 V 4.64 V, short-circuit current 1.03 μA 2.69 μA. At doping, reaches 3.46 μW, an internal resistance approximately 10 MΩ. applied external force. frequency Hz, forces 2 N, 3 4 5 6 N applied, voltages 3.4 5.9 8.7 10.3 respectively. Compared pure PAN, constant <i>d<sub>33</sub></i> by 4.86 times. efficiently charge commercial capacitors, discharged capacitors successfully green LED. Additionally, it monitor real-time, under passive conditions, bending state knee forward movement bicycle wheel during cycling. After 10,000 impact cycles, stable no obvious fluctuations, demonstrating excellent stability. Overall, exhibits outstanding flexibility, low cost, self-powered capabilities, showing promising potential for applications wearable/portable electronics, smart devices, intelligent robotics.
Language: Английский
Citations
0
Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120105 - 120105
Published: Feb. 1, 2025
Language: Английский
Citations
0
Journal of Thermal Analysis and Calorimetry, Journal Year: 2025, Volume and Issue: unknown
Published: May 2, 2025
Abstract In order to increase the compatibility with polyvinylidene fluoride (PVDF), multi-walled carbon nanotubes (MWCNTs) were modified by trimethoxy (1H, 1H, 2H, 2H heptadecafluorodecyl) silane obtain fluorosilane-modified MWCNTs (F-MWCNTs). The as-prepared F-MWCNTs characterized scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) confirm successful surface modification of fluorosilane. further blended polymethyl methacrylate (PMMA) PVDF prepare MWCNTs/PMMA/PVDF ternary composites containing 1%, 3%, 5%, 7%, 10% solution mixing, SEM, WAXD, FTIR, alternating current (AC) electrical conductivity testing. It was confirmed that homogeneously distributed in PMMA/PVDF matrix. Moreover, existence contributed improvement crystallization degree ( X c ) β crystalline content [ F )] as well AC σ for composites. values , ), at 100 Hz MWCNTs(10%)/PMMA/PVDF composite 47.4%, 56.5%, 2.40 × 10 –1 Sm −1 respectively, while corresponding pure only 42.2%, 27.8%, 1.85 –9 respectively. enhanced performances comparison those can be attributed interface interactions among F-MWCNTs, PVDF, PMMA phase separation PVDF.
Language: Английский
Citations
0
Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 54, P. 105252 - 105252
Published: Oct. 10, 2024
Language: Английский
Citations
3
Rare Metals, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 25, 2025
Language: Английский
Citations
0