ACS Applied Engineering Materials
·
2026
·
IF 3.5
Meng Zhang,Shuangxiang Li,Bin Can,Zhenhui Li,Yangda Hou,Qingche He,Yongyun Mao
Achieving both efficient mechanical energy harvesting and all-night passive luminescence in a single flexible film remains a critical challenge for self-powered smart road systems. In this work, a poly(vinylidene fluoride)/SrAl2O4:Eu2+,Dy3+ (PVDF/SAOED) composite film is fabricated by tape-casting, which integrates triboelectric nanogeneration and ultralong persistent luminescence into one flexible unit─a combination that, to the best of our knowledge, has not been previously reported for all-night passive road marking applications with both liquid–solid and solid–solid energy harvesting modes. To overcome the moisture sensitivity and poor polymer compatibility of SAOED phosphors, a silicone-resin surface coating strategy is adopted. At the optimized coating ratio, the crystal structure is well preserved, the afterglow decay to 1.36 mcd/m2 exceeds 15 h, and the luminescence loss is below 10%. A liquid–solid triboelectric nanogenerator (TENG) based on this film delivers 150 nA and 1.8 V under water droplet impact, adapting well to varying rainfall intensities. A solid–solid TENG operating at 1 Hz produces a stable voltage of about 11 V and lights up over 40 LEDs. After UV excitation, the film emits bright blue-green light with CIE coordinates nearly identical to the neat phosphor, enabling “daytime storage, nighttime glow” while harvesting energy from raindrops and footsteps. Through this coating strategy, the interfacial compatibility and luminescence retention are synergistically enhanced, and the influence of PVDF content on dielectric, mechanical, and triboelectric properties is systematically revealed. This work provides a material platform for maintenance-free, all-weather, visually interactive self-powered road marking and smart traffic facilities.
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高影响因子
ACS Applied Electronic Materials
·
2026
·
IF 4.7
Xue-Ting Zhang,Meng-Nan Liu,Sai Wang,Gang Zheng,Ru Li,Jun Zhang,Xiuping He,Wen-Peng Han,Yun-Ze Long
To overcome the limitations of flexible sensors relying on external power supply and single-mode detection, this study proposes a self-powered flexible sensor based on PVDF-TrFE-co-PEG Diamine@ionic liquid nanofiber membrane. This sensor integrates capacitive and piezoelectric dual modes within a compact sandwich structure, enabling high-sensitivity static pressure detection and self-powered dynamic signal generation without requiring an external power source or mode switching. This sensor exhibits ultrahigh sensitivity (32.28 kPa–1, pressure < 12.5 kPa) in capacitive mode and can generate an open-circuit voltage as high as 1.51 V in piezoelectric mode, achieving efficient mechanical energy-to-electrical energy conversion. This will demonstrate broad application prospects in the fields of passive wearable electronics and electronic skin, providing a methodology for designing multifunctional integrated sensing systems.
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Chenxi Liu,Yutao Fan,Shuang Yu,Shikun Fang,Zijian Dai,Fujun Wang,Lu Wang,Fan Zhao
Abstract Triboelectric nanogenerators (TENGs) based on poly(vinylidene fluoride) (PVDF) have attracted considerable attention for wearable and self-powered biomedical electronics due to their flexibility, biocompatibility, and favorable triboelectric properties. However, their relatively limited electrical output still hinders practical applications. Herein, a synergistic strategy integrating hierarchically porous structure engineering and barium titanate (BaTiO3, BTO) nanoparticle (NP) incorporation was developed to enhance the triboelectric performance of PVDF nanofiber membranes. In particular, the hierarchical porous structure increases surface roughness and effective contact area, thereby promoting interfacial charge generation. BTO NPs compensate for the reduction in effective dielectric permittivity associated with the porous structure. The synergistic effect of these two factors achieved a short-circuit current of 0.863 ± 0.027 μA, a transferred charge density of 25.99 ± 0.62 μC m−2, and a power density of 650 mW m−2. The output voltage increased to 64.44 ± 0.83 V, corresponding to a 204.8% enhancement compared with the pristine device. Finally, the device was attached to the elbow joint, the contact area of the arm, and the sole of a shoe to verify its ability to monitor human motion signals and power electronic devices. The results demonstrated that the sensors can effectively distinguish between different motion states and can power small electronic devices for harvesting mechanical energy. Overall, this study developed a simple yet highly efficient strategy for enhancing the electrical output capacity of PVDF-TENG and holds promising potential for practical applications in human physiological signal monitoring and self-powering wearable devices.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Yining Zhang,Jiahao Gan,Mengyang Xu,Jinze Li,Xiang Liu,Zhengyu Chen,Aigang Zhang,Pengwei Huo
Dual-electric-field coupling of the S-scheme g-C 3 N 4 /BiOCl heterojunction and β-PVDF piezo-polarization modulates oxygen-vacancy energy levels for efficient charge separation. • An oxygen-vacancy-rich g-C 3 N 4 /BiOCl photocatalyst is integrated into a porous PVDF membrane, achieving stable immobilization and rapid mass transport. • The multifunctional membrane delivers a high piezo-photocatalytic rate of 0.04012 min −1 and 98.21 % tetracycline removal under light-mechanical coupling. • The composite membrane exhibits excellent recyclability and enables synergistic piezo-photocatalytic purification for antibiotic-contaminated wastewater. Oxygen vacancies (O Vs ) play an important role in photocatalysis, but exploiting O Vs in heterostructures to achieve efficient electron trapping and directional transport remains challenging. In this study, oxygen-vacancy-rich 2D/2D g-C 3 N 4 /BiOCl nanosheets were prepared via a simple hydrothermal method and immobilized on a porous β-PVDF matrix through a freeze-assisted phase inversion process, forming a flexible piezo-photocatalytic membrane. The results indicate that the built-in electric field of the g-C 3 N 4 /BiOCl heterojunction and the piezoelectric polarization field of PVDF jointly regulate the electronic behavior near O Vs . These two electric fields overlap around the defect sites and favorably modulate the defect energy levels, thereby enhancing the ability of O Vs to capture electrons. This dual-field regulation deepens the defect potential wells, prolongs electron residence time, and suppresses carrier recombination. The piezoelectric field also provides a directional driving force that guides electron transport along the interface and promotes the generation of reactive oxygen species. Using tetracycline as the target pollutant, the g-C 3 N 4 /BiOCl/PVDF-50 % membrane exhibited the highest piezo–photocatalytic activity, with an apparent rate constant of 0.04012 min −1 . Overall, this study elucidates the synergistic mechanism among the piezoelectric field, the heterojunction electric field, and O Vs , and provides an effective strategy for designing high performance flexible piezo-photocatalytic materials. Oxygen‑vacancy‑rich g‑C 3 N 4 /BiOCl nanosheets embedded in a flexible β‑PVDF membrane construct dual electric fields by combining an S‑scheme built‑in field with piezoelectric polarization under mechanical vibration. This dual‑field superposition deepens defect potential wells, facilitates directional charge separation, and enhances defect‑mediated O 2 activation, thereby enabling efficient piezophotocatalytic degradation of tetracycline in aqueous solution. Download: Download high-res image (148KB) Download: Download full-size image
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Xiaofan Qin,Tingting Zhang,Fufeng Yan,Jing Chen,Haiyang Dai,Yang Yang,Guilin Song,Renzhong Xue,Tao Li
Precise free volume regulation suppresses charge migration, doubling breakdown strength. • PVDF/PMMA blend films achieve a significant leap in energy storage density. • Free volume studied via positron annihilation lifetime (PAL) and simulation. Five series of PVDF/PMMA blend films were fabricated, and their energy storage performance was investigated via experimental and theoretical analyses of free volume characteristics. PMMA incorporation significantly enhances thermal stability of blend film. For instance, with 50 wt % PMMA, the glass transition temperature ( T g ) rises to 117.2 °C, much higher than that of pure PVDF (−45.2 °C). Increasing PMMA content decreases free volume size but increases its relative fraction, thereby enhancing breakdown strength and reducing material density. Although a moderate reduction in dielectric constant is observed, the marked improvement in breakdown strength leads to an overall increase in energy storage density. Specifically, at 40 wt % PMMA, the blend film achieves a maximum energy storage density of 8.13 J/cm 3 ( ƞ = 67%), substantially exceeding the 3.01 J/cm 3 ( ƞ = 67%) of pure PVDF, while exhibiting a high T g of 105.1 °C. These results highlight a synergistic effect derived from the complementary properties of the two polymers, offering an effective strategy for developing high-performance polymer-based energy storage films that combine the advantages of dipolar and linear dielectric materials.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Dongyuan Li,Xiaojun Peng,Rui Zhang,Yadong Chen,Peng Song,Wei Chen,Da Wang
The ubiquitous presence of emerging contaminants (ECs) such as antibiotics and synthetic dyes in aquatic systems necessitates advanced remediation technologies. However, conventional polyvinylidene fluoride (PVDF) membranes often suffer from severe fouling and rapid flux decline due to their inherent hydrophobicity, severely limiting their long-term applicability. This study presents the rational design of Ti-MOF/CN/PVDF composite membranes via integrated solvothermal synthesis of Ti-MOF/g-C 3 N 4 (CN) heterojunctions and nanoparticle-regulated phase inversion. Comprehensive characterization (XRD, XPS, SEM-EDS, BET, AFM) confirmed the successful fabrication of the heterojunction membrane. XPS and XRD analyses confirmed the formation of covalent bonds at the (Ti-O-N) interface and lattice strain induced by the nanoparticle filler, effectively suppressing PVDF crystallization. Ti-MOF/CN exhibits a unimodal particle size distribution (D50 ≈ 400 nm) and high BET specific surface area (72.44 m 2 g −1 ). Its uniform dispersion in PVDF increases the membrane pore size from 28.1 nm in pristine PVDF to 38.7 nm at 1 wt% Ti-MOF/CN, significantly enhancing the overall porosity. The top-performing M3 composite membrane demonstrated exceptional multifunctionality: it achieved retention rates exceeding 90% for multiple dyes (Rhodamine B, Methyl Blue, Malachite Green) and antibiotics (Tetracycline). Long-term retention experiments were conducted on complex wastewater containing mixed dyes, alongside photodegradation tests under simulated solar radiation conditions (AM 1.5G, 100 mW cm −2 ). Results indicate over 95% retention of mixed pollutants. Visible light irradiation significantly enhances the M3 membrane's FRR to 91.6%, further demonstrating the Ti-MOF/CN composite membrane's robust long-term operational stability and self-cleaning capability for photocatalytic degradation of aqueous pollutants.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 13
·1001
·
IF 3.2
Chen Huyue,Wang Jingrong,Lu Tengfei,Xu Deming,Xu Haiping,Yang Dandan,Chen Lifei
TiO 2 was deposited on the surface of Ti 3 C 2 T x MXene by the sol–gel method to construct core–shell structured MXene@TiO 2 fillers, which were then introduced into the PVDF matrix to prepare dielectric composite films. The effects of TiO 2 deposition ratio and filler loading on the dielectric properties of the composites were systematically investigated, and the thermal and mechanical properties of the optimized system were further evaluated. The results showed that the TiO 2 coating layer could construct an effective interfacial insulating structure, which enhanced interfacial polarization while suppressing carrier migration and the formation of leakage pathways, thereby enabling the synergistic regulation of dielectric constant and dielectric loss. When the TiO 2 deposition mass ratio reached 50%, the composites showed a more effective overall interfacial modulation effect. Under these conditions, the 15 wt% composite delivered the optimal overall dielectric performance, with a dielectric constant of 29.1 and a dielectric loss as low as 0.051, representing a significant reduction compared with that of the unmodified MXene/PVDF composite (0.59), and it also exhibited superior dielectric stability. At the same time, the thermal stability and mechanical performance of the composites were also enhanced. The study confirms that building a TiO 2 interfacial insulating layer is an effective approach to enhancing the dielectric performance of PVDF-based composites while realizing the coordinated optimization of multiple properties.
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高影响因子
Carbon Neutralization
·
2026
·Vol. 5
·期 3
·e70152
·
IF 21.5
Zhe Yang,Ning Wu,Muqi Chen,Zeyang Yu,Jianming Liu,Juanli Zhao,Tao Jiang,Yaokun Pang,Zhihua Xiong,Morten Willatzen,Jianjun Luo,Zhong Lin Wang
Understanding the microscopic mechanism of interfacial charge transfer is crucial for optimizing the performance of triboelectric nanogenerators (TENGs). Here, a combined first-principles density-functional theory and experimental study reveals how polymer polarity and chemical composition regulate charge transfer at PVDF/polymer interfaces, including Nylon, PDMS, PVC, PE, PTFE, and FEP. The results demonstrate that polar β-PVDF/polymer heterostructures exhibit substantially stronger interfacial charge transfer than nonpolar systems, driven by the intrinsic built-in electric field of β-PVDF. The transferred charges primarily originate from the functional groups of the polymers, and the charge transfer magnitude follows the sequence β-PVDF/Nylon > β-PVDF/PDMS > β-PVDF/PVC > β-PVDF/PE > β-PVDF/PTFE > β-PVDF/FEP, corresponding to electron flow from low work function polymers toward the high work function β-PVDF. Furthermore, these theoretical trends are supported by experimental results, which confirm that β-PVDF-based TENGs deliver higher electrical outputs than α-PVDF-based systems and follow the same material-dependent sequence. This work elucidates the polarization-driven and material-dependent mechanisms of interfacial charge redistribution, providing design principles for high-output and controllable TENGs.
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高影响因子
Case Studies in Thermal Engineering
·
2026
·
IF 6.6
Kang Lei,Wen-hao Wang,Xian-die Zhang,Ji-yu Lu,Xing-liang Wu,Sen Xu,Xiang Zhou
This study successfully fabricated core-shell structured Al@ADN/PVDF energetic composites through electrostatic spraying, with nano-aluminum (n-Al) cores encapsulated by an ammonium dinitramide (ADN)/polyvinylidene fluoride (PVDF) composite shell. The morphology and structure were systematically characterized using scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Thermal decomposition behavior was investigated through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), with corresponding kinetic parameters calculated. Combustion processes were monitored via high-speed imaging, while ignition and combustion performance were evaluated under both ambient and confined environments. The results show that n-Al particles are uniformly encapsulated by a continuous ADN/PVDF composite shell. Compared to physically mixed mixture, the Al@ADN/PVDF composites exhibit a 6.7% reduction in the PVDF decomposition stage mass loss and demonstrate a 24% reduction in decomposition activation energy. Furthermore, Al@ADN/PVDF composites demonstrate superior combustion characteristics, including 102% higher maximum pressure, 128% faster pressurization rate, 19% shorter ignition delay time and 17% shorter burning time. The core-shell Al@ADN/PVDF architecture provides an innovative approach for optimizing the energetic potential of aluminum in both solid propellant and pyrotechnic applications.
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高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Shi Feng,Rui Li,Quanbin Ma,Juqi Wang,Haoyang Chen,Hongjun Qian,Fengjuan Xu,Shishang Guo
The development of flexible wearable sensors in health monitoring has garnered significant attention, and piezo electric pressure sensing technology has emerged as a piv otal research direction. This study successfully fabricated a n ovel ZnO NRs/PVDF-TrFE nanocomposite material for construct ing high-performance piezoelectric nanogenerators (PENG). Zn O nanorods (ZnO NRs) were synthesized via high-temperature hydrothermal synthesis and integrated into the PVDF-TrFE poly mer matrix through electrospinning. The effects of ZnO content on the piezoelectric performance and β-phase crystallinity of th e composite were systematically investigated. Experimental res ults demonstrated that a 5 wt% ZnO content yielded optimal co mposite performance: achieving a β-phase content of 87.6% an d a significant voltage output increase to 12 V. The composite fi lm exhibited excellent mechanical stability, maintaining stable e lectrical output after 3000 consecutive compression cycles, pro ving its potential as a durable wearable device. Finally, when ap plied to monitor standing long jump movements in adolescents, the sensor demonstrated outstanding dynamic response capa bility and sensitivity, validating its practical value in real-time hu man motion monitoring.
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PubMed
高影响因子
CARBON
·
2026
·
IF 12.7
Fuhui Cui,Xiaozhe Chen,Yuntao Lang,Manping Wang,Ben Liu,Feifei Wang,Rongke Gao,Yang Lu,Liandong Yu
An environmentally-friendly temporally shaped femtosecond laser strategy is developed for fabricating functional composites. • A ″ lamellar LIG–nanographene particle " composite layer was fabricated via femtosecond laser dual-pulse processing. • The resulting MSCs achieve an area-specific capacitance of 58.25 mF cm −2 , 3.7 times higher than pure LIG-based devices. • Optimizing the pulse delay to 20 ps further increases the capacitance to 162 mF cm −2 with cycling stability. • Integrated into a flexible sensor, the MSC demonstrates high-sensitivity detection of physiological signals across multiple body regions. This study proposes a temporally shaped femtosecond laser liquid-phase strategy for in-situ functionalization of poly(vinylidene fluoride) (PVDF) film to overcome prevalent limitations of micro-supercapacitor (MSC)-based flexible sensors, including constrained processing precision and intractable material performance optimization. Interaction between femtosecond dual pulses and PVDF triggers in-situ surface graphitization, yielding a lamellar laser-induced graphene (LIG) architecture. Concurrently, the laser dissociates graphene sheets in the dispersion into nanoparticles that firmly anchor onto LIG, constructing a hierarchical “lamellar LIG–nanographene particles” composite functional layer. Integrating femtosecond laser direct-writing patterning, temporally shaped based MSCs were fabricated. Systematic tuning of inter-pulse delay via temporally shaped identified an optimal 20 ps delay, yielding devices with areal capacitance (162 mF cm −2 ), energy density (14.40 μWh·cm −2 ), cycling stability (97.81% after 10,000 cycles), and robust durability. Flexible sensors assembled with the MSC achieved highly sensitive monitoring and distinct signal discrimination of diverse human physiological activities. This work establishes a novel laser processing paradigm for flexible micro-energy storage devices and provides a versatile material/device platform to advance flexible electronic systems for health monitoring, human–computer interaction, and sports rehabilitation. Download: Download high-res image (297KB) Download: Download full-size image
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高影响因子
ACS Applied Electronic Materials
·
2026
·
IF 4.7
Yue Shen,Ying Liu,Yao Jiang,Jingtao Wang,Zheng Li
By blending P(VDF-TrFE) with PVDF-HFP and introducing a small amount of ZnO, a composite film system with both mechanical flexibility and electrical responsiveness was constructed. The effects of the TrFE/HFP ratio and hot rolling temperature on the mechanical behavior and strain-induced electrical response of the films were systematically studied. The results show that the introduction of HFP improves film ductility, while a higher TrFE content enhances load bearing capability and electrical response. Among the investigated compositions, the TrFE80/HFP20 composite containing 1.08 wt % surface-modified ZnO showed a good balance between electrical response and mechanical compliance. After hot rolling, the films processed at 65 °C showed stable mechanical behavior at low to moderate strain and produced clear open circuit voltage signals under stretching. Clear electrical signals were also observed under thermal perturbation. Based on these results, the selected composite film was used to fabricate flexible strain sensors, demonstrating promising potential for practical applications.
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高影响因子
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