CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zaitian Wang,Xuan Li,Fei Sun,Kaining Zhang,Fei Long,Tong Zhou,Lei Liu
Flexible piezoelectric films represent a groundbreaking advancement for wearable energy harvesting and bioelectronics, where mechanical adaptability and efficient electromechanical conversion are equally crucial. However, the persistent incompatibility between high piezoelectric coefficients and structural pliability creates a critical performance ceiling that undermines device reliability in dynamic operating environments. Here, we report an in situ interface engineering strategy to fabricate high-performance flexible piezoelectric films directly on Ti foils through combining hydrothermal synthesis of BaTiO 3 films with infiltration of P(VDF-TrFE). The flexible P(VDF-TrFE)/BaTiO 3 film with spatially interlocked heterostructure exhibits an excellent piezoelectric coefficient d 33 of ~264 pC N −1 , representing an enhanced remnant polarization of 21.4 μC cm −2 and a reduced coercive field of 220 kV cm −1 . The as-prepared piezoelectric film assembled on the Ti foil substrates demonstrates long-lasting flexibility, retaining an output voltage of about 5 V after 5000 bending cycles. The exceptional performance originates from the improved polarization through the stabilized BTO nanodomain synthesized by the in situ hydrothermal process. Furthermore, the spatially interlocked architecture redistributes polarized charges, thereby mitigating polarization degradation induced by microscale defects. This study pioneers a new paradigm for developing high-performance flexible piezoelectric film, and the scalable process can be potentially applied to wearable applications.
研究领域:
材料科学
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纳米技术
·
能源采集
·
生物电子学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Advances
·
2025
·
IF 6
Qin Luo,Kepeng Hu,Haoqing Liu,Xiyue Duan,Wen Chen,Xiaoyi Chen,Xiaojun Long,Weiming Lin,Chengwei Wu,Zhangfa Song,Chengyun Ning,Wenjian Weng,Kui Cheng
The limited self-healing capacity of critical-sized bone defects presents significant challenges in healing. An effective approach is to regulate the physicochemical properties of biomaterials to mimic the natural bone regenerative microenvironment. In this work, we have prepared Chitosan-Gelatin (CS-Gel) based hydrogel/ Poly(vinylidene fluoride- co -trifluoroethylene) (P(VDF-TrFE)) systems, which provide biomimetic and electric cues for bone regeneration. These hydrogel membranes are constructed on P(VDF-TrFE) layers, and the sustained electrical cues rely on the dipole orientation of P(VDF-TrFE). The bilayer structure decouples electrical stimulation and biocompatibility from chemical composition, allowing the generation of self-sustained electrical cues without altering the functional groups on the hydrogel surface. The results show that these hydrogel/P(VDF-TrFE) systems are more effective in polarizing macrophages toward the alternatively activated (M2) phenotype and promoting stem cell differentiation in vitro. Furthermore, the hydrogel/P(VDF-TrFE) system enhances the expression of anti-inflammatory cytokines and encourages new bone formation in vivo. This work presents a promising strategy to accelerate bone regeneration by combining electrical cues and biomimetic environments, offering a new preparation method for hydrogel/P(VDF-TrFE) systems with self-sustained electrical cues.
研究领域:
生物材料
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组织工程
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生物医学工程
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再生医学
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高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Cuicui Su,Lingling Zhang,Yuanzheng Zhang,Xiaocheng Huang,Yumin Ye,Yu Xia,Zhiyi Gong,Xiaojuan Qin,Yichao Liu,Shishang Guo
In the background of air pollution and regular COVID-19 prevention, personal protective masks are necessary for our daily life. However, protective masks with high PM0.3 filtration usually have poor air permeability and are mostly disposable, leading to a heavy burden on the environment. In this work, a reusable membrane based on piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers embedded with BaTiO3 nanoparticles (BTO NPs) was developed. The P(VDF-TrFE)/BTO composite nanofibers not only have enhanced piezoelectricity and surface polarity but also have reduced diameters that could be beneficial for electrostatic adhesion, pole–polar interactions, and mechanical sieving to increase the PM0.3 capture capacity. Moreover, the BTO NPs also improved the charge storage capacity of the composite membrane, which could further enhance the PM0.3 filtration efficiency after corona treatment. The piezoelectric mask based on P(VDF-TrFE)/BTO composite nanofibers has high filtration efficiencies of 96% for PM0.3 and 98% for bacteria, while the pressure drop was only 182 Pa, which is lower than the commercial N95 standard of 343.2 Pa. Furthermore, the piezoelectric mask has a long and stable filtration performance after 5 cycles of 75% alcohol disinfection, demonstrating that the P(VDF-TrFE)/BTO composite membrane has a potential application in personal protective masks with comfortable and reusable properties.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 20
·1-9
·
IF 2.8
Yan YuanJie,Fu Qiong,Hou YaFei,Hao Xiaoya,Zhu ZhiBiao,Du Peng,Luo LaiHui,Li WeiPing
To affect or suppress space charge movements is capable of improving the breakdown strength ( E b ) and thus discharge energy density ( U d ) of polymer-based nanocomposites. Herein, partial-fluorinated AOF nanosheets with –F-induced electron traps and –OH groups were designed and prepared. Accompanied with the AOF nanosheet filling, both experimental and simulation results prove the synergistic effects of restricted leakage current channel, prolonged breakdown strength, suppressed secondary collision electron movement and strong interfacial interactions are beneficial in enhancing E b of polymer-based nanocomposites. Consequently, the 1-vol% AOF/P(VDF-HFP) nanocomposite exhibits an excellent E b of 548.4 MV/m and thus a satisfactory U d of 18.5 J/cm 3 . Meanwhile, the charge–discharge efficiency ( η ) of the 1-vol% AOF/P(VDF-HFP) nanocomposite remains 81.1%. The results above suggest a superior performance in comparation with pure P(VDF-HFP) (9.1 J/cm 3 and 72.9%). The primary results might provide a new solution for improving U d and η of nanocomposites.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2018
·
IF 2.906
Qilong Zhang,Yongchang Jiang,Enjie Yu,Hui Yang
Core-shell structured BaTiO 3 @polyaniline (BT@PANI) nanoparticles were synthesized via surface hydroxylation and in-situ polymerization method and were embedded into Poly(vinylidene fluoride- co -hexafluoropropylene) [P(VDF-HFP)] matrix. The dielectric performance as well as thermal behavior of BT@PANI/P(VDF-HFP) nanocomposite films are investigated. The crystallinity increases with increasing the BT@PANI content. Compared with BT particles, the BT@PANI core-shell nanoparticles exhibit notable improvement on dielectric properties . Typically, with a filler content of 20 vol% BT@PANI, the dielectric constant of BT@PANI/P(VDF-HFP) composite film reaches 99.1 at 1 kHz, which is 6.2 times larger than that of 20 vol% BT (16.1) and 9.6 times larger than pristine P(VDF-HFP) (10.3). Enhanced permittivity is generated from the interfacial polarization and the microcapacitor effect provided by the core-shell nanoparticles. Moreover, nanocomposite film maintains a low dielectric loss of 0.21 at 1 kHz. This research offers a solution for fabricating dielectric composite with large dielectric constant and low dielectric loss, which could be beneficial for the improvement of advanced electronic devices.
研究领域:
材料科学
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电气工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Kaiyuan Lai,Yurong Liu,Ruohe Yao,Kuiwei Geng
High sensitivity, highly integrated, low-power consumption, and highly flexible pressure sensors are essential for applications in fields such as electronic skin, smart robotics, and human-AI interaction. In this study, a highly sensitive integrated pressure sensor was prepared on a flexible PI substrate which includes a thin-film transistors (TFTs)-based amplifier with a P(VDF-TrFE)/BaTiO3 piezoelectric composite sensing unit. The sensing unit is connected to the extended gate of one In-doped ZnO (IZO) TFT, while the other IZO TFT serves as a load resistor for the amplifier. The integrated sensor can directly convert an external pressure applied to P(VDF-TrFE)/BaTiO3 composite into a voltage (or current) signal and amplify it without an additional charge amplifier. The results indicate the integrated sensor exhibits a low power consumption of 100 ~ 200 μW, a high sensitivity of 0.64 V/kPa, and a rapid response time of 20 ms. The integrated sensor can be used to detect human movements and vital signs in real time, such as finger bending and stretching, pulse, and vocal cord vibrations, suggesting that the integrated sensor has a great deal of promise for application in wearable health monitoring systems.
研究领域:
电子皮肤
·
智能机器人
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人机交互
·
健康监测系统
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Nuoxin Xu,Xingrong Xiao,Hui Yang,Enjie Yu,Qilong Zhang
In this study, TiO 2 nanowires with various aspect ratios were prepared via a precursor-controlled hydrothermal process. Ternary composite films comprised of P(VDF-HFP) polymer, Ag particles and the as-synthesized TiO 2 nanowires were then fabricated. The results reveal that TiO 2 NWs with high aspect ratios (i.e., pa-TiO 2 ) exhibit superiority in enhancing the dielectric constants of composites in comparison with their low-aspect-ratio counterparts (i.e., pr-TiO 2 ). For instance, the dielectric constant of the Ag/pa-TiO 2 /P(VDF-HFP) composite with 30 vol% TiO 2 NWs reaches 33.4 at 100 Hz, which is 42.1% larger than that of Ag/pr-TiO 2 /P(VDF-HFP) sample and 227% higher than pristine P(VDF-HFP). In addition, TiO 2 nanowires also serve as physical obstacles to avoid aggregation of Ag particles. As a consequence, the ternary composites filled with high-aspect-ratio TiO 2 NWs exhibit suppressed dielectric losses (e.g., 0.023 at 100 Hz) and low conductivities, making them promising candidates for applications in integrated capacitors and energy storage devices.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 2
·1269-1279
·
IF 2.019
Hu Liang,Xia Yuting,Wang Qianqian,Yang Hui,Zhang Qi-long
In this work, a core–shell dendritic CuO@TiO 2 was constructed through a two-step chemical method. Structural analysis confirms the successful coating of TiO 2 on the CuO and the dendritic morphology was maintained after the coating process. The composites were prepared by using ferroelectric P(VDF-HFP) as matrix and synthesized particles as filler. The introduction of fillers influences the melting and crystallization process of the polymer matrix without altering the composition. The insulator layer suppresses the conductivity and dielectric loss by blocking the charge carriers while the composites exhibit improved dielectric constant in the frequency wide range of 10 2 –10 6 Hz and enhanced thermal conductivity. The composite with 20% CuO@TiO 2 exhibits a high dielectric constant of 51.7, low loss of 0.11 at 1 kHz and high thermal conductivity of 0.382 W/mK, showing huge potential for dielectric applications.
研究领域:
材料科学
·
电气工程
·
复合材料
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产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Liqin Yao,Zhao Zhang,Qi-long Zhang,Zheng Zhou,Hui Yang,Lu Chen
A lot of efforts have been devoted to enhance the outputs of triboelectric nanogenerators (TENGs) via optimizing the friction materials in recent years. Here, the modified organic polystyrene (PS) microspheres embedded Poly[(vinylidene fluoride)-co-trifluoroethylene] P(VDF-TrFE) composites are developed to construct lotus-leaf surface microstructure and enhance the permittivity of P(VDF-TrFE). Besides, owing to the rich positively charged -NH 3 groups of the hexadecyl-trimethyl-ammonium-bromide (CTAB) in the solvent, the surface potential of composites is significantly improved by CTAB modified PS microspheres. Coupling of designed surface microstructure, high permittivity, and enhanced surface potential, the TENG assembled by P(VDF-TrFE) (+) and Polytetrafluoroethylene (PTFE, -) exhibits considerable outputs (the short-circuit current density and peak power density are 47.45 mA/m 2 and 7.88 W/m 2 , respectively), much higher than those of pristine P(VDF-TrFE) and unretouched PS/P(VDF-TrFE). In the applications, 413 LEDs in series can be lighted up directly by the TENG without energy storage. A smart mouse pad is also proposed to work as the self-powered sensor to detect typical mouse motions. This research provides a comprehensive solution to optimize the positive friction material in simple and feasible methods of surface/interface design and surface potential regulation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zheng Zhou,Zhao Zhang,Qilong Zhang,Hui Yang,Yulu Zhu,Yuanyu Wang,Lu Chen
Piezoelectric nanogenerators (PENGs), as a promising solution to harvest mechanical energy from ambient environment, have attracted much attention over the past decade. Here, the core–shell structured BaTiO3@Carbon (BT@C) nanoparticles (NPs) were synthesized by a simple surface-modifying method and then used to fabricate the efficient PENGs with poly[(vinylidene fluoride)-co-trifluoroethylene] (P(VDF-TrFE)). The carbon shell with the uniform thickness of 10–15 nm can increase the content of the polar β phase in P(VDF-TrFE) and significantly enhance the interfacial polarization between BT NPs and the polymer matrix during the poling process. Out of all compositions, the 15 wt % BT@C/P(VDF-TrFE) PENG exhibited the optimal piezoelectric performance with an output voltage of ∼17 V and a maximum power of 14.3 μW under bending–releasing mode. More importantly, the PENG can also efficiently harvest other types of mechanical energy from human activities and exhibits stable output after 1500 bending–releasing cycles. When the PENG was bent and beat by bicycle spokes, a peak voltage of 16 V was generated, which can light up 12 white LEDs directly and charge the commercial capacitors. Our research provides a new strategy to fabricate flexible and efficient PENGs from a nanoscale viewpoint; it can be hopefully applied in energy-harvesting systems and wearable electric sensors.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wu,Huiling Guo,Huajun Sun,Xiaofang Liu,Huiting Sui,Fang Wang
Flexible piezoelectric energy harvesters (PEHs) have attracted extensive interest because of their ability to transform mechanical energy into electric power. Here, PEHs were fabricated using P(VDF-TrFE)-based piezoelectric composite films containing lead zirconate titanate (PZT) powder and –OH-functionalized graphene (HOG) nanosheets (HOG-P/P). Among all composites, a high open-circuit voltage ( V oc) of approximately 50 V p-p and a maximum power density of 1.4 μW/cm 2 were obtained from a HOG-P/P PEH with 0.10 wt% HOG nanosheets and 15 wt% PZT under bending–releasing mode. Moreover, the PEH exhibited a stable voltage output after 3000 bending–releasing cycles. In addition, the PEH harvested mechanical energy from human body movements and generated an output voltage and current of 60 V and 8 μA during the finger bending–releasing process, lighting up 30 commercial white LEDs. The enhanced piezoelectric performance can be attributed to the introduction of HOG nanosheets and PZT powder. This work provides an effective strategy for improving the output performance of P(VDF-TrFE)-based PEHs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 12
·2102549
·
IF 6.389
Jiamin Zhang,Xuzhao He,Suya Lin,Xiaoyi Chen,Lingqing Dong,Jun Lin,Huiming Wang,Wenjian Weng,Kui Cheng
Piezoelectric biomaterials are considered to be able to mimic the electrophysiological microenvironment of natural bone tissue, thus enhancing the bone regeneration. However, the effects of heterogeneous electric potential gradient of piezoelectric biomaterials on their osteogenic performance still remain elusive, largely because of the challenge of harassing the distribution of electric potential gradient on the surface of piezoelectric biomaterials. This study controls the heterogeneous electric potential gradient on the CoFe 2 O 4 /poly(vinylidene fluoride-trifluoroethylene (CFO/P(VDF-TrFE)) membrane by using an alternatively positive–negative polarization processing on microscaled straight-stripe patterned indium tin oxide coated glass (ITO) electrodes. The potential gradient (Δ ζ ) on membranes can be controlled by the stripe width and polarization parameters. Interestingly, Δ ζ shows a significant influence on the cellular osteogenic potential of mesenchymal stem cells (MSCs) and the bone regeneration performance in vivo. The Δ ζ of 0.672 pm/(V*µm) shows the optimal osteogenic performance both in vitro and in vivo, which can be attributed to the boost of integrins α 5 β 1 expression as well as the orientated arrangement and contractility of the cytoskeletons via mechanotransduction signaling cascades. This work therefore shows the importance of heterogeneous electric potential and provides a novel strategy to accelerate the osteogenic performances of piezoelectric biomaterials.
研究领域:
生物医学工程
·
生物材料科学
·
组织工程
·
细胞生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）