INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2023
·
IF 4.6
Yian Hu,Shunyao Huang,Yujia Gao,Jaeyeon Lee,Zhangsiyuan Jin,Geon-Hyoung An,Yuljae Cho
Wearable or patchable biosensors have attracted tremendous attention due to their continuous health-monitoring capabilities. In particular, self-powered passive biosensors based on a piezoelectric nanogenerator (PENG) have demonstrated measurements of physiological signals from which cardiovascular information can be analyzed such as heart rate and blood pressure. However, challenges still remain with regard to both material and device aspects. For the effective and accurate measurement of extremely weak physiological signals, various methods have been introduced, including employment of inorganic lead-based piezoelectric materials and design of a complex material or device structure. In spite of their effectiveness in enhancing the piezoelectric output response, the introduced methods brought concomitant issues, such as toxicity and complexity. We present unique methods to produce a transparent standalone piezoelectric polymer film which can be directly transferred to any surface such as the human skin. Through a room temperature solvent vapor annealing process, we further enhance the crystallinity and a portion of the ferroelectric β-phase of the transparent standalone polymer film, resulting in an improved piezoelectric output response. Based on these two new methods introduced, we demonstrate a simple sandwich-structured, transparent, and patchable biosensor based on PENG for radial artery detection with significantly reduced complex manufacturing processes, providing great practical value.
研究领域:
生物医学工程
·
材料科学
·
纳米技术
·
可穿戴技术
·
健康监测
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2017
·
IF 2.499
Dou Zhang,Zhong Wu,Xue-fan Zhou,An-qi Wei,Chao Chen,Hang Luo
Dielectric materials with high energy storage density are attracting scientific and commercial interest due to the prospect of application in advanced electronic devices and electric power systems. Ceramic/polymer composite is one of the most promising materials to obtain high energy density because it combines high permittivity from ceramic and high breakdown strength as well as flexibility from polymer matrix. However, the homogeneous dispersion and compatibility of nanoparticles in polymers matrix are still of great challenges due to the different surface energy between inorganic fillers and organic polymer matrix. Interfaces modification for ceramic fillers is an effective way to ease the mentioned problems. Herein, we proposed a low-cost and environmentally friendly route to prepare a core–shell structure by paraffin engineer the BaTiO 3 nanoparticles. The modified BaTiO 3 nanoparticles exhibited homogeneous dispersion in the ferroelectric polymer poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) matrix and strong interfacial adhesion with the polymer matrix. The nanocomposites prepared in this work showed notably enhanced energy storage density. The maximum storage energy density of the nanocomposite with 50 vol% BaTiO 3 increased to 21.1 J/cm 3 at 150 kV/mm. These results indicate that paraffin is an effective modifier to prepare high energy storage density capacitor.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Chao-Hua Xue,Ren-Xuan Wei,Xiao-Jing Guo,Bing-Ying Liu,Mi-Mi Du,Meng-Chen Huang,Hui-Gui Li,Shun-Tian Jia
Daytime radiative cooling that cools down an object by reflecting solar light and radiating heat simultaneously is expected to be a promising technology for dissipating heat without any energy consumption. However, radiative cooling materials’ solar reflection and infrared emissivity will be affected by the rain or dust pollution, therefore reducing the cooling performance under outdoor environments. A superhydrophobic radiative cooling composite film with hydrophobic SiO 2 embedded in poly(vinylidene fluoride-co-hexafluoropropene) was proposed via phase separation technology. The SiO 2 particles not only imparted to the film porous micro-nano tier rough structure to enhance the surface hydrophobicity , but also improved the mid-infrared emissivity of the film. As a consequence, the as-prepared film achieved 10.3 °C cooling under direct sunlight with convective heat reduced by transparent polyethylene film, and excellent superhydrophobicity with water contact angle greater than 160° and sliding angle close to 0°. Moreover, the cooling performance and superhydrophobicity of the film changed little after immersion in different pH solution and long-time exposure to UV irradiation. Importantly, the obtained film demonstrated great self-cleaning property making it hardly to be contaminated in outdoor environments, which is significant for sustainable applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Xing Kun,Hao Yanan,Wang Xin-Jie,Huang Lei,Gao Yi,Liang Tong,Meng Yan,Bi Ke,Zhong Shao-Long,Dang Zhi-Min
Maintaining high charge/discharge efficiency while enhancing discharged energy density is crucial for energy storage dielectric films applied in electrostatic capacitors. Here, a nano-submicron structural film comprising ferroelectric material P(VDF-HFP) and linear dielectric material PMMA has been flexibly designed via the electrospinning process. Nano-submicron structure enables the film to maximize the ferroelectric material component and obtain improved dielectric performance without sacrificing breakdown strength and charge/discharge efficiency. As a result, the 40%-420 nm PMMA-P(VDF-HFP)@PMMA sample achieved an discharged energy density of 13.72 J/cm³ at a field of 740 kV/mm, with an impressive charge/discharge efficiency of 80%. This work presents a composite dielectric film that excels in breakdown strength, discharged energy density, and charge/discharge efficiency, offering a strategy for designing reliable, industrial-grade energy storage dielectrics.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 3
·469-477
·
IF 5.693
Wang Ziman,Gao Yin,Ma Yu,Xie Xixi,Yang Ming,Zhang Hang
This paper investigates the electrocaloric effect (ECE) in polymer nanocomposite films containing ferroelectric poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free nanopowders. The nanopowders include pure BaTiO 3 and rare-earth substituted Ba 0.94 R 0.04 TiO 3 , where R = La, Nd, Sm, prepared by a modified sol-hydrothermal method. The substitution influences the lattice parameters, but all samples exhibit a perovskite-type tetragonal phase. The dopant enhances the relaxation behavior of the matrix and decreases the current. Using the Maxwell equations, the ECE performance is systematically studied for all samples. As the rare-earth ionic radius decreases, the Curie temperature of the nanocomposite increases and the dielectric constant decreases. The isothermal entropy changes (Δ S ), adiabatic temperature changes (Δ T ), cooling energy densities ( Q ), and electrocaloric strengths versus temperature exhibit different dependences on electric field ( E ). The results demonstrate that rare-earth doping can effectively modify the ECE. Our composites achieve large EC strength values (|Δ T |/|Δ E |) of 7 to 21 μK m kV −1 over a wide temperature range of 25 to 60 °C and electric field range of 750 to 1250 kV cm −1 and provide typical examples of polymer ECE materials containing rare-earth doped nanopowders. Graphical abstract The preparation of the polymer nanocomposites and the adiabatic temperature changes and the corresponding electrocaloric strengths of the samples.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Na Qiang,Tao Zhu,Lihong Huang,Wenlong Zhang,Peishi Hu,Jiayi Lu,Xuefeng Zhang,Qingyun Tang,Guocong Liu,Qiang Lin,Shuo Tang
Bone tissue engineering requires biomaterials capable of bionically simulating the physiological electro-microenvironment of natural bone to regulate osteogenic cell behavior. Herein, Ti 3 C 2 T x MXene/P(VDF-TrFE) electroactive nanocomposite membranes with tunable surface potential were successfully fabricated via electrospinning technology. The microstructure, crystal phase composition, thermal stability, piezoelectric performance, and electrical conductivity of the composite membranes were systematically characterized using Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy (Raman), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), piezoelectric coefficient (d 33 ) measurements, and surface resistance tests. XRD, FTIR, and Raman characterizations confirmed that MXene acted as a nucleating agent, which inhibited the formation of the α-phase of P(VDF-TrFE) and promoted the generation of the ferroelectric β-phase. Piezoelectric and electrical property tests demonstrated that MXene doping significantly enhanced the piezoelectric performance and electrical conductivity of the composite membranes. Specifically, the d33 value of the composite membrane with 2.0 wt% MXene reached 5.4 pC/N. Moreover, the surface resistance of MXene-doped membranes was drastically reduced from 230.0 mΩ (for the pure P(VDF-TrFE) membrane) to ∼24–25 mΩ, constructing an efficient charge transport pathway. Consequently, the MXene/P(VDF-TrFE) membranes facilitated cell adhesion, stretching, and proliferation, exhibiting excellent biocompatibility. Meanwhile, cells cultured on the composite membranes displayed enhanced spreading and improved cytoskeletal organization. Further osteogenic assessments revealed that MXene-containing substrates effectively promoted osteogenic differentiation at both the early and late stages, as well as enhanced the formation of mineralized extracellular matrix. These findings suggest that MXene incorporation provides a favorable microenvironment for directing the osteogenic differentiation of Bone Marrow Mesenchymal Stem Cells (BMSCs). The fabricated MXene/P(VDF-TrFE) nanocomposite membranes possess a biomimetic microenvironment with sustainable electric potential and optimal topographical structure, offering an innovative and well-suited strategy for applications in bone regeneration.
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yangjie Zhong,Chengming Tang,Jidong Sun,Yafeng Zhang,Shaoxiong Cai,Jiaxin Yu
A dielectric film with high breakdown strength and dielectric constant are crucial for the reliable operation of electrowetting on dielectric (EWOD). In this study, barium titanate (BaTiO3) nanoparticles modified with a silane coupling agent (KH550) were incorporated into poly(vinyl fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) and poly(methyl methacrylate) (PMMA) to prepare a BaTiO3–KH550/P(VDF-TrFE-CTFE)/PMMA composite film to enhance the breakdown strength and dielectric constant of a dielectric layer. Results revealed that BaTiO3–KH550 is uniformly dispersed within the P(VDF-TrFE-CTFE)/PMMA polymer matrix. When the BaTiO3–KH550 content is 10 wt %, the dielectric constant reached 24.6, and the energy density was 2.65 J cm–3, representing increases of 94% and 73%, respectively, compared to the pure P(VDF-TrFE-CTFE)/PMMA film, where was 12.7 and 1.53 J cm–3. Additionally, the breakdown strength of all films remains above 150 kV mm–1 due to the strong interfacial interaction between PMMA and P(VDF-TrFE-CTFE). Furthermore, the breakdown strength can keep at 194.90 kV mm–1. Electrowetting experiments demonstrated that the composite film exhibited a high initial contact angle of 105.04°, with a contact angle variation range of 35.3° under a low DC voltage ranged from 0 to 50 V. The results indicated that this film is potential for applications in low-cost and high-dielectric-performance EWOD dielectric layer materials.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Yongchang Jiang,Jiabang Wang,Qilong Zhang,Hui Yang,Da Shen,Fuming Zhou
Dielectric polymer nanocomposites have been attracting increasing attention because of their wide range of applications in electronics industry. To improve their dielectric properties , incorporating conductive fillers and ceramic fillers into the polymer matrix is considered to be an effective solution. Here, Ni nanoparticles (about 50–90 nm) were decorated onto the surface of polydopamine (PDA) coated BaTiO 3 nanowires to synthesize Ni@polydopamine@BaTiO 3 nanowires (Ni@PDA@BT NWs, also denoted as NPB) with different Ni loading amount. The nanowires were then added into poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) matrix and composite films were prepared. The dielectric performance of composite films is largely enhanced owing to the microcapacitor effect and interfacial polarization effect induced by Ni nanoparticles. This enhancement can be improved by increasing the loading amount of Ni. Crystallization behavior of the films were also investigated. With 20 vol% of Ni@PDA@BT NWs added, the dielectric constant of the composite film reaches 48.4 at 1 kHz, in contrast to 29.5 for 20 vol% of BT and 10.6 for pristine P(VDF-HFP). And the dielectric loss tangent remains at a low level of 0.23 at 1 kHz. These composite films exhibit potential for applications in flexible electronic devices and electrical systems.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 6
·1817-1827
·
IF 3.2
Yuan Cong,Hongyuan Zhang,Yizhi Liu,Fante Liu,Zidi Zhang,Xu Liu
In this article, a piezoelectric thin film was obtained by mixing polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) and barium titanate (BTO) via a solvent vaporization process. All the morphologies, crystal phases, thermal and electrical tests, as well as potential simulations by COMSOL, were studied to analyze sample performances. It has been demonstrated that BTO has a positive effect on increasing the piezoelectric functional phase-β phase within P(VDF-TrFE). Furthermore, the optimal ratio of BTO to P(VDF-TrFE) was determined to be 10 wt%. BTO nanoparticles were evenly distributed in the P(VDF-TrFE) substrate, forming a more directional structure. Based on the most suitable material composition, piezoelectric, and triboelectric nanogenerators were constructed to harvest mechanical energy from human motions. Moreover, the factors influencing the electrical outputs of nanogenerators were systematically studied, such as the force values and frequencies of excitation, as well as the piezoelectric layer materials. The applications of lighting LEDs highlighted the practical use in everyday life. Finally, the comparison between simulations, theoretical analysis, and experimental results demonstrated the effect of BTO in enhancing the overall material properties. This work expands the application potential of piezoelectric nanocomposites in energy collection and storage by designing and optimizing ceramic-doped piezoelectric polymer composites.
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 Biomaterials Science & Engineering
·
2023
·
IF 5.8
Zhiyuan Zhou,Jiamin Zhang,Xuzhao He,Xiaoyi Chen,Lingqing Dong,Jun Lin,Huiming Wang,Wenjian Weng,Kui Cheng
Surface potentials of biomaterials have been shown to regulate cell fate commitment. However, the effects of chirality-patterned potential distribution on macrophage polarization are still only beginning to be explored. In this work, we demonstrated that the chirality-patterned potential distribution of CoFe2O4/poly(vinylidene fluoride-trifluoroethylene) (CFO/P(VDF-TrFE)) films could significantly down-regulate the M1 polarization of bone marrow-derived macrophages (BMDMs). Specifically, the dextral-patterned surface potential distribution simultaneously up-regulated the expression of M2-related markers of BMDMs. The results were attributed to the sensitive difference of integrin subunits (α5β1 and αvβ3) to the dextral- and sinistral-patterned surface potential distribution, respectively. The interaction difference between the integrin subunits and surface potential distribution altered the cell adhesion and cytoskeletal structure and thereby the polarization behavior of BMDMs. This work, therefore, emphasizes the importance of chirality of potential distribution on cell behavior and provides a new strategy to regulate the immune response of biomaterials.
研究领域:
生物材料
·
免疫学
·
细胞生物学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 20
·5083
·
IF 3.1
Wen Huang,Caiyuan Liu,Xin Fang,Hui Peng,Yonggang Yang,Yi Li
This work presents a facile way to fabricate a polymer/ceramics composite gel electrolyte to improve the overall properties of lithium-ion batteries. Lithium salt-grafted silica was synthesized and mixed with P(VDF-HFP) to produce a nanofiber film by the electrostatic spinning method. After coating a layer of SiO2onto the surface of nanofibers through a sol-gel method, a composite nanofiber film was obtained. It was then immersed in plasticizer until saturation to make a composite gel electrolyte film. Electrochemical test results showed that the obtained gel electrolyte film shows high thermal stability (~450 °C), high ionic conductivity of 1.3 × 10−3S cm−1at 25 °C and a lithium-ion transference number of 0.58, and superior cycling stability, providing a new direction for manufacturing secondary batteries with higher safety and performance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 73
·69580-69585
·
IF 3.289
Xingrong Xiao,Nuoxin Xu,Yongchang Jiang,Qilong Zhang,Enjie Yu,Hui Yang
Ag-loaded TiO2 hybrid particles (TiO2@Ag) were synthesized as fillers by using an ethylene glycol reduction method. Based on this, the TiO2@Ag/P(VDF-HFP) hybrid films were prepared by embedding TiO2 nanoparticles in a poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)] matrix. Morphology and thermal analysis show that the introduction of TiO2@Ag does not disrupt the continuity of the polymer matrix, while the strong interaction between fillers and matrix influences the crystallization process of the composite. The adhesion of Ag to TiO2 efficiently separates the Ag particles from connecting and suppresses the formation of a conductive network, and the ultra-small Ag nanoparticles “trap” the carriers due to coulombic blockade and quantum confinement effect, which results in low dielectric loss and electrical conductivity of the composites. As a consequence, the dielectric permittivity of polymer nanocomposites was enhanced by 300% over the P(VDF-HFP) matrix at a filler content of 30 vol% while maintaining a rather low dielectric loss (0.037 at 1 kHz), demonstrating promising applications in electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）