Article
Chemistry, Physical
Ye Tian, Qiangqiang Qian, Yufeng Sheng, Xuanhe Zhang, Huaping Wu, Lixin Xu, Long Li, Huijian Ye
Summary: In this study, a tubular architecture in P(VDF-TrFE) composite film was constructed using modified halloysite nanotubes functionalized with poly(dopamine) to enhance energy capability. The dielectric constant and energy density of the composite film were significantly improved, providing an efficient diffusion route in polymer dielectrics for high energy density film capacitors.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Rui Qiao, Haoran Xu, Shaonan Chen, Sheng Chen, Hang Luo, Dou Zhang
Summary: Dielectric polymers are crucial in modern electronic and electrical applications due to their easy processing, lightweight, and high breakdown strength. By combining different polymer advantages, the dielectric polymer blending method is a feasible option to address the issue of high ε(r) and breakdown strength in dielectric homopolymers. Experimental results showed the significant impact of n-type semiconductive polymer on the dielectric and energy storage properties of PPDI/PVTC blends.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Robotics
Daiyue Wei, Quan Xiong, Jiufeng Dong, Huacen Wang, Xuanquan Liang, Shiyu Tang, Xinwei Xu, Hongqiang Wang, Hong Wang
Summary: This study successfully develops nanocomposite films with high dielectric constant and low loss by accumulating charges at the matrix-filler interfaces, enhancing the force. Additionally, ultra-thin and lightweight EA clutches are fabricated with low power consumption and high load-bearing capacity. The extensive applications of this technology in the field of robotics are demonstrated through the display of a dexterous robotic hand.
Article
Polymer Science
N. Pereira, S. Goncalves, J. C. Barbosa, R. Goncalves, C. R. Tubio, J. L. Vilas-Vilela, C. M. Costa, S. Lanceros-Mendez
Summary: Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) samples were prepared by solvent casting with varying polymer concentration and solvent evaporation temperature. Different sample morphologies and physical-chemical properties were obtained under different processing conditions, while electroactive beta-phase content and degradation temperature remained independent of processing conditions. Pressure and bending capacitive sensors were developed with excellent response and high sensibility based on the high dielectric response of the samples.
Article
Chemistry, Multidisciplinary
Chenchen Wang, Yang Zhang, Bowen Zhang, Bo Wang, Jinxi Zhang, Long-Qing Chen, Qiming Zhang, Zhong Lin Wang, Kailiang Ren
Summary: Flexoelectricity-induced flexophotovoltaic effect has been demonstrated in a KNN/PVDF-TrFE nanocomposite, significantly enhancing the photovoltaic current. The curved K/P-20 composite shows a 13.9% increase in the photovoltaic current compared to the flat nanocomposite, indicating great potential for PVDF-based nanocomposites in ferroelectric memory device applications.
Article
Polymer Science
Juliane C. Kade, Biranche Tandon, Jan Weichhold, Dario Pisignano, Luana Persano, Robert Luxenhofer, Paul D. Dalton
Summary: This study successfully fabricated well-defined microperiodic structures of the copolymer Poly(vinylidene fluoride-co-trifluoroethylene) using the melt electrowriting (MEW) technique, and demonstrated the electromechanical response of the fibers. This research lays the foundation for the application of electroactive polymers in various fields.
POLYMER INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jing Cui, Esther Rebollar, Tiberio Ezquerra, Aurora Nogales
Summary: Bilayers of ferroelectric polymers (PVDF-TrFE) on P3HT substrates were prepared and the formation of holes and continuous layers was observed. The surface tension of the different P3HT substrates was obtained through contact angle measurements. The study provides understanding on the mechanism of stable film formation and effective tools to control the formation of holes in functional polymer bilayers, which is important in the fabrication of organic thin film-based devices.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Da Shen, Qilong Zhang, Zhao Zhang, Hui Yang, Jiansong Sheng
Summary: A feasible method was designed to prepare composite films with high permittivity and enhanced hydrophobic performance. The composite, made of TiO2 nanowire arrays and P(VDF-TrFE), showed good dielectric properties and improved wettability due to a microrough structure built by P(VDF-TrFE) nanofibers.
Article
Nanoscience & Nanotechnology
Madhusmita Bhuyan, Smrutirekha Sahoo, Alok kumar Sahu, Perumal Alagarsamy, Dibakar Sahoo
Summary: In this paper, the authors report a significant enhancement of the relative permittivity of PMMA-based nanodielectrics in the presence of carbon dots (CDs) and neodymium-doped carbon dots (Nd-CDs). The presence of many interfaces inside the PMMA@CD composites due to nanofillers is the cause of this significant enhancement in dielectric permittivity, which is further increased in the presence of Nd-CDs. The results of this study provide important insights for the commercial use of PMMA nanodielectrics in capacitors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Polymer Science
Thulasinath Raman Venkatesan, David Smykalla, Bernd Ploss, Michael Wuebbenhorst, Reimund Gerhard
Summary: The effects of thermal processing on the micro- and nanostructural features and relaxor-ferroelectric properties of a P(VDF-TrFE-CFE) terpolymer were investigated. Annealing reduces the Curie transition temperature and shifts the ferroelectric phase fraction, leading to relaxor-ferroelectric behavior. Changes in transition temperatures are related to alterations in hysteresis curves.
Article
Polymer Science
Zhubing Han, Hancheng Qin, Xin Chen, Wenhan Xu, Yang Liu, J. Bernholc, Qing Wang
Summary: The incorporation of comonomers in PVDF-based ferroelectric polymers has been widely used to modify their structures and properties. Previous studies have shown that large-sized comonomers can induce relaxor ferroelectricity, but this study demonstrates that a small-sized comonomer can preferentially adopt a polar all-trans conformation, resulting in terpolymers with robust ferroelectricity and enhanced transition temperature and coercive field. This work systematically investigates the effects of comonomer size on the microstructures and properties of ferroelectric polymers.
Article
Materials Science, Composites
Yufan Ping, Weimin Xia, Jiahong Zhou, Xiaofang Zhang, Zhong Li
Summary: A lead-free tetragonal-phase (Ba0.94Ca0.06)(Ti0.95Zr0.05)O-3 (BCTZ) micro sheet with polarizing behavior of relaxor ferroelectricity and high dielectric constant (e(r) ∼ 2400) is prepared. Flexible BCTZ/P(VDF-TrFE) composite films are prepared by doping BCTZ into ferroelectric copolymer. The piezoelectric strain coefficient (d(33)) of BCTZ/P(VDF-TrFE) films shows a negative value and reaches -47.3 pC/N in the 15/85 wt% BCTZ/P(VDF-TrFE) film.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Ceramics
Kanyapak Silakaew, Prasit Thongbai
Summary: The nBT@PVDF core-shell filler particles with improved dispersion can significantly enhance the dielectric properties of PVDF matrix nano-composites.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Hannah Donnelly, Mark R. Sprott, Anup Poudel, Paul Campsie, Peter Childs, Stuart Reid, Manuel Salmeron-Sanchez, Manus Biggs, Matthew J. Dalby
Summary: There is a clinical demand for viable bone grafts, and tissue engineering strategies using mesenchymal stromal cells (MSCs) to create potential bone-graft materials can help fulfill this need. However, the long culture periods and cost associated with MSC osteogenesis in a clinical setting necessitate the investigation of strategies for optimizing cell production. In this study, a piezoelectric copolymer with a fibronectin network coating is used to enhance MSC adhesion and present growth factors, and electrical stimulation is applied to investigate the MSC response.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Sushant Kumar, Pramod K. Singh, Daksh Agarwal, Pawan Singh Dhapola, Tejas Sharma, Serguei Savilov, Ekaterina A. Arkhipova, Manoj K. Singh, Abhimanyu Singh
Summary: Solid polymer electrolyte films blended with ionic liquid and polymer are prepared and their physical and electrochemical properties are evaluated.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Honghong Gong, Qinglong Ji, Yipin Cheng, Jie Xiong, Meirong Zhang, Zhicheng Zhang
Summary: This article discusses the importance of high voltage pulse capacitors in energy storage equipment and the use of polymer films in them. Traditional BOPP films cannot meet the demand for high energy density due to their low dielectric constant, so controlling/living radical polymerization and designing all-organic polymer films are the current research focus.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Chao Chen, Yunchuan Xie, Meirong Zhang, Jing Li, Xiaoyong Wei, Zhicheng Zhang
Summary: A new sandwich-structured composite material has been developed, which shows improved breakdown strength and electrical polarization, resulting in a significant increase in discharged energy density.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Zhong Li, Meirong Zhang, Ying Zhang, Tao Lu, Weiwei Zhu, Zhicheng Zhang
Summary: This research explores the energy harvesting performance of poly(vinylidene trifluoroethylene) (P(VDF-TrFE)) films with different chemical compositions and thicknesses. The results show that these films can meet certain power consumption levels and are suitable for self-sustained sensing systems, with tunable system parameters.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Chemistry, Applied
Xing Fan, Mengdi Sun, Zhong Li, Zhenhua Chen, Xiaoyong Zhou, Quanxuan Lu, Zhicheng Zhang
Summary: With the increasing attention in the biomedical field and intelligent wearable devices, flexible piezoelectric materials, such as polyvinylidene fluoride (PVDF)-based polymers, have shown a broad potential in the field of sensors. However, the existing materials are expensive and difficult to process, hindering their commercial application. This study focuses on the poly(vinylidene fluoride-tetrafluoroethylene) (P(VDF-TFE), F24) copolymers due to their low cost and great potential in the piezoelectric field. The researchers systematically investigated the structure and dielectric properties of P(VDF-TFE) copolymers with different TFE contents, and explored the effect of thermal annealing on their piezoelectric performances. The results showed that the sample F24-20A130 exhibited the best piezoelectric properties, with a piezoelectric stress constant (d33) of -20 pC/N. This sample also demonstrated excellent response sensitivity in sensing tests, making it a promising material for flexible sensor applications in healthcare and wearable devices.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Engineering, Manufacturing
Jian Wang, Sen Liang, Jie Xiong, Biyun Peng, Lijun He, Yunchuan Xie, Zhicheng Zhang
Summary: This study successfully enhances the energy storage properties of polymer nanocomposites through surface modification and structure modulation. By utilizing self-assembly phase-transitioned lysozyme (PTL) modification and layered gradient structure design, interface defects can be weakened and charge injection can be reduced simultaneously, resulting in a higher energy density.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Computer Science, Information Systems
Qisheng Wang, Zhicheng Zhang, Kean Chen, Ji Guan, Wang Fang, Junyi Liu, Mingsheng Ying
Summary: Computing the fidelity between two unknown mixed quantum states rho and sigma in an N-dimensional Hilbert space is a fundamental problem in quantum computing and quantum information. This paper proposes a quantum algorithm that can solve this problem in ${\mathrm{ poly}}(\log (N), r, 1/\varepsilon) time, where r is the lower rank of rho and sigma, and $\varepsilon$ is the desired precision, assuming the purified versions of rho and sigma are prepared by quantum oracles. This algorithm demonstrates an exponential speedup compared to the best known algorithm based on quantum state tomography, which has polynomial time complexity in N.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2023)
Article
Materials Science, Multidisciplinary
Yong Lu, Qizheng Li, Zhicheng Zhang, Xiao Hu
Summary: In this study, two magnolol-based polymers were designed and synthesized for high-performance polymer dielectrics. The polymers showed excellent thermal, mechanical, and dielectric properties, making them promising materials for energy storage.
MATERIALS & DESIGN
(2022)
Article
Engineering, Environmental
Xinyi Li, Yunchuan Xie, Jie Xiong, Dajiang Long, Jin Zhang, Bofeng Zhu, Xiao Zhang, Xinhua Duan, Zhenxue Liu, Zhicheng Zhang, Xingyi Huang
Summary: High-temperature film capacitors with polymer film dielectrics face challenges of large leakage currents, leading to low energy density and charge-discharge efficiency. A structural-tailoring strategy is proposed to overcome this issue by synthesizing a novel functional monomer containing benzimidazole and pyridine groups (BBP) and preparing cross-linked c-P(AEK-BBP) dielectric films. The introduction of BBP units and the cross-linked network significantly suppress the leakage current, resulting in improved energy density of 7.3 J·cm-3 under 600 MV·m-1 and 150 degrees C, outperforming current heat-resistant dielectric polymers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Applied
Honghong Gong, Ying Zhang, Yipin Cheng, Qinglong Ji, Mengdi Sun, Shaobo Tan, Zicai Zhu, Zhicheng Zhang
Summary: Actuators based on smart materials can produce mechanical deformation in response to external stimulation, and are widely used in bionic robots, wearable devices, and biomedical devices. Most current actuators can only generate a single deformation function, but it is expected that through the integration of visualization technology, the actuators will have broader application prospects. Recent studies have shown that the integration of deformation and visualization technology can greatly contribute to the further development of deformation technology. However, there is a relative lack of systematic review on the integration of deformation and visualization technology in current literature on smart actuators.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Physical
Yijin He, Bofeng Zhu, Shaobo Tan, Zhenxue Liu, Xiao Zhang, Zhicheng Zhang
Summary: This study investigates the dielectric and energy storage properties of chlorinated poly(vinyl chloride) (CPVC) and finds that high-temperature annealing can improve the energy storage properties of CPVC, achieving high energy density and discharge efficiency. The results show that heat-treated CPVC has low dielectric loss and high breakdown strength, making it suitable for high-pulse metallized film capacitors.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jie Chen, Zhantao Pei, Yijie Liu, Kunming Shi, Yingke Zhu, Zhicheng Zhang, Pingkai Jiang, Xingyi Huang
Summary: Researchers have developed an aromatic-free polymer with good electrical insulation and low conductivity at high temperatures and high electric fields. By using density functional theory calculations and semiconductor doping, the polymer achieves high discharge density and charge-discharge efficiency at elevated temperatures, while demonstrating excellent breakdown self-healing capability, making it suitable for continuous operation under extreme conditions.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Yipin Cheng, Qinglong Ji, Bofeng Zhu, Xiao Zhang, Honghong Gong, Zhicheng Zhang
Summary: Researchers have developed a new polymer dielectric with higher energy density and lower energy loss by introducing fluorine atoms and manipulating electron distribution. Experimental results show that this polymer exhibits higher discharge efficiency and energy density compared to existing polymer dielectrics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Zhuting Hao, Danhong Yang, Zhicheng Zhang, Qin-Xiang Jia, Wen Zhang
Summary: Researchers have studied MOF/polymer composite dielectrics to improve compatibility and energy storage density. However, the composition-structure-property relationships are still unclear. This paper investigates formic acid MOF/polylactic acid composites and explores their influence on dielectric properties. The results show that different MOFs and metal ions have different effects on the composites.
JOURNAL OF ADVANCED DIELECTRICS
(2023)
Article
Chemistry, Multidisciplinary
Meirong Zhang, Bofeng Zhu, Xiao Zhang, Zhenxue Liu, Xiaoyong Wei, Zhicheng Zhang
Summary: Polymer-based dielectrics, such as biaxially oriented polypropylene (BOPP), have limitations in achieving high energy density due to low permittivity. To address this issue, electron-deficient vinyl quinoline (VQQ) units were copolymerized with methyl methacrylate (MMA) and blended with a PMMA matrix. This strategy successfully increased energy discharging efficiency and obtained a higher energy density. This work provides a promising approach for commercial application of high energy density and low loss polar polymer dielectrics in energy storage capacitors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Xinyi Li, Yunchuan Xie, Jie Xiong, Bofeng Zhu, Xiao Zhang, Xinhua Duan, Bo Dong, Zhicheng Zhang
Summary: This study introduces BN nanoparticles coated with ABA voltage stabilizer into a copolymer, improving the dispersion of BN particles and reducing energy loss induced by electric field distortion. The optimized composite film exhibits high energy density and efficiency at high temperatures.
MATERIALS HORIZONS
(2023)
