1
|
Chahari M, Salman E, Stanacevic M, Willing R, Towfighian S. Hybrid triboelectric-piezoelectric nanogenerator for long-term load monitoring in total knee replacements. Smart Mater Struct 2024; 33:055034. [PMID: 38645721 PMCID: PMC11025032 DOI: 10.1088/1361-665x/ad3bfd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/29/2024] [Accepted: 04/08/2024] [Indexed: 04/23/2024]
Abstract
A self-powered and durable pressure sensor for large-scale pressure detection on the knee implant would be highly advantageous for designing long-lasting and reliable knee implants as well as obtaining information about knee function after the operation. The purpose of this study is to develop a robust energy harvester that can convert wide ranges of pressure to electricity to power a load sensor inside the knee implant. To efficiently convert loads to electricity, we design a cuboid-array-structured tribo-pizoelectric nanogenerator (TPENG) in vertical contact mode inside a knee implant package. The proposed TPENG is fabricated with aluminum and cuboid-patterned silicone rubber layers. Using the cuboid-patterned silicone rubber as a dielectric and aluminum as electrodes improves performance compared with previously reported self-powered sensors. The combination of 10w t % dopamine-modified BaTiO3 piezoelectric nanoparticles in the silicone rubber enhanced electrical stability and mechanical durability of the silicone rubber. To examine the output, the package-harvester assemblies are loaded into an MTS machine under different periodic loading. Under different cyclic loading, frequencies, and resistance loads, the harvester's output performance is also theoretically studied and experimentally verified. The proposed cuboid-array-structured TPENG integrated into the knee implant package can generate approximately 15μ W of apparent power under dynamic compressive loading of 2200 N magnitude. In addition, as a result of the TPENG's materials being effectively optimized, it possesses remarkable mechanical durability and signal stability, functioning after more than 30 000 cycles under 2200 N load and producing about 300 V peak to peak. We have also presented a mathematical model and numerical results that closely capture experimental results. We have reported how the TPENG charge density varies with force. This study represents a significant advancement in a better understanding of harvesting mechanical energy for instrumented knee implants to detect a load imbalance or abnormal gait patterns.
Collapse
Affiliation(s)
- Mahmood Chahari
- State University of New York at Binghamton, Binghamton, NY, United States of America
| | - Emre Salman
- Stony Brook University, Stony Brook, NY, United States of America
| | | | - Ryan Willing
- University of Western Ontario, London, Ontario, Canada
| | - Shahrzad Towfighian
- State University of New York at Binghamton, Binghamton, NY, United States of America
| |
Collapse
|
2
|
Tian G, Deng W, Yang T, Zhang J, Xu T, Xiong D, Lan B, Wang S, Sun Y, Ao Y, Huang L, Liu Y, Li X, Jin L, Yang W. Hierarchical Piezoelectric Composites for Noninvasive Continuous Cardiovascular Monitoring. Adv Mater 2024:e2313612. [PMID: 38574762 DOI: 10.1002/adma.202313612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/25/2024] [Indexed: 04/06/2024]
Abstract
Continuous monitoring of blood pressure (BP) and multiparametric analysis of cardiac functions are crucial for the early diagnosis and therapy of cardiovascular diseases. However, existing monitoring approaches often suffer from bulky and intrusive apparatus, cumbersome testing procedures, and challenging data processing, hampering their applications in continuous monitoring. Here, a heterogeneously hierarchical piezoelectric composite is introduced for wearable continuous BP and cardiac function monitoring, overcoming the rigidity of ceramic and the insensitivity of polymer. By optimizing the hierarchical structure and components of the composite, the developed piezoelectric sensor delivers impressive performances, ensuring continuous and accurate monitoring of BP at Grade A level. Furthermore, the hemodynamic parameters are extracted from the detected signals, such as local pulse wave velocity, cardiac output, and stroke volume, all of which are in alignment with clinical results. Finally, the all-day tracking of cardiac function parameters validates the reliability and stability of the developed sensor, highlighting its potential for personalized healthcare systems, particularly in early diagnosis and timely intervention of cardiovascular disease.
Collapse
Affiliation(s)
- Guo Tian
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Weili Deng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Tao Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Jieling Zhang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Tianpei Xu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Da Xiong
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Boling Lan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Shenglong Wang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Yue Sun
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Yong Ao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Longchao Huang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Yang Liu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xuelan Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Long Jin
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Weiqing Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
- Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| |
Collapse
|
3
|
Hao S, Zhong C, Wang L, Qin L. A High-Performance Flexible Hydroacoustic Transducer Based on 1-3 PZT-5A/Silicone Rubber Composite. Sensors (Basel) 2024; 24:2081. [PMID: 38610295 PMCID: PMC11014239 DOI: 10.3390/s24072081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024]
Abstract
In recent years, hydroacoustic transducers made of PZT/epoxy composites have been extensively employed in underwater detection, communication, and recognition for their high energy conversion efficiency. Despite the ease with which these transducers can be formed into complex shapes, their lack of mechanical flexibility limits their versatility across various sizes of underwater vehicles. This study introduces a novel flexible piezoelectric composite hydroacoustic transducer (FPCHT) based on a 1-3 PZT-5A/silicone rubber composite and an island-bridge flexible electrode, which can break the limitations of existing hydroacoustic transducers that do not have flexibility. The finite element method is used to optimize the structural parameters of high-performance 1-3 FPC. A large-sized (187 mm × 47 mm × 5.12 mm) FPC is fabricated using an improved cutting-filling method and packaged into the FPCHT. Compared with the planar rigid PZT/epoxy composite hydroacoustic transducer (RPCHT) of the same size, the TVR (186.5 db) of the FPCHT has increased by about 7 dB, indicating that it has better acoustic radiation performance and electroacoustic conversion efficiency. Furthermore, its electroacoustic performance exhibits excellent stability under different bending states. Therefore, the FPCHT with high electroacoustic performance is an ideal substitute for the existing RPCHT and promotes the development of hydroacoustic transducers towards flexibility and portability.
Collapse
Affiliation(s)
- Shaohua Hao
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
| | - Chao Zhong
- Beijing Key Laboratory for Sensors, Beijing Information Science and Technology University, Beijing 100101, China; (C.Z.); (L.Q.)
| | - Likun Wang
- School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
| | - Lei Qin
- Beijing Key Laboratory for Sensors, Beijing Information Science and Technology University, Beijing 100101, China; (C.Z.); (L.Q.)
| |
Collapse
|
4
|
Yan M, Liu S, Liu Y, Xiao Z, Yuan X, Zhai D, Zhou K, Wang Q, Zhang D, Bowen C, Zhang Y. Flexible PVDF-TrFE Nanocomposites with Ag-decorated BCZT Heterostructures for Piezoelectric Nanogenerator Applications. ACS Appl Mater Interfaces 2022; 14:53261-53273. [PMID: 36379056 DOI: 10.1021/acsami.2c15581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Flexible piezoelectric nanogenerators are playing an important role in delivering power to next-generation wearable electronic devices due to their high-power density and potential to create self-powered sensors for the Internet of Things. Among the range of available piezoelectric materials, poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE)-based piezoelectric composites exhibit significant potential for flexible piezoelectric nanogenerator applications. However, the high electric fields that are required for poling cannot be readily applied to polymer composites containing piezoelectric fillers due to the high permittivity contrast between the filler and matrix, which reduces the dielectric strength. In this paper, novel Ag-decorated BCZT heterostructures were synthesized via a photoreduction method, which were introduced at a low level (3 wt %) into the matrix of PVDF-TrFE to fabricate piezoelectric composite films. The effect of Ag nanoparticle loading content on the dielectric, ferroelectric, and piezoelectric properties was investigated in detail, where a maximum piezoelectric energy-harvesting figure of merit of 5.68 × 10-12 m2/N was obtained in a 0.04Ag-BCZT NWs/PVDF-TrFE composite film, where 0.04 represents the concentration of the AgNO3 solution. Modeling showed that an optimum performance was achieved by tailoring the fraction and distribution of the conductive silver nanoparticles to achieve a careful balance between generating electric field concentrations to increase the level of polarization, while not degrading the dielectric strength. This work therefore provides a strategy for the design and manufacture of highly polarized piezoelectric composite films for piezoelectric nanogenerator applications.
Collapse
Affiliation(s)
- Mingyang Yan
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Shengwen Liu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Yuan Liu
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Zhida Xiao
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Xi Yuan
- College of Chemistry and Chemical Engineering, Central South University, Changsha410083, Hunan, China
| | - Di Zhai
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Qingping Wang
- Department of Mechanical Engineering, University of Bath, United Kingdom, BathBA2 7AY, U.K
| | - Dou Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| | - Chris Bowen
- Department of Mechanical Engineering, University of Bath, United Kingdom, BathBA2 7AY, U.K
| | - Yan Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, Hunan, China
| |
Collapse
|
5
|
Sun C, Zhong C, Wang L, Qin L. Design and Preparation of Double-Harmonic Piezoelectric Composite Lamination. Materials (Basel) 2022; 15:ma15227959. [PMID: 36431445 PMCID: PMC9699237 DOI: 10.3390/ma15227959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 10/26/2022] [Accepted: 11/03/2022] [Indexed: 05/27/2023]
Abstract
In this work, a new type of double-harmonic piezoelectric composite laminated structure is designed. Two bending vibration frequencies are generated by designing the structure with non-equal length and non-equal width, and the response is relatively consistent at the frequency point of the double-harmonic vibration. Firstly, the finite element software ANSYS is used to establish the simulation model of double-harmonic piezoelectric composite lamination. Two bending vibration frequencies are generated by using the non-equal length structure design, and the variation law of the conductance curve with the laminated structure is analyzed. Then, according to this law, the structure is optimized, and a non-equal width structure is further proposed in this work. Different double-harmonic piezoelectric composite laminations are prepared for comparison. The simulation and experimental results show that the value of the corresponding conductance curve at the two vibration frequency points can be increased or reduced by changing the lamination width. Then, the same conductance peak can be obtained to have a relatively consistent response at the double-harmonic frequency point. This will provide a good choice for expanding the transducer bandwidth and developing the broadband energy collector.
Collapse
Affiliation(s)
| | - Chao Zhong
- Correspondence: (C.Z.); (L.Q.); Tel.: +86-188-1045-6266 (C.Z.); +86-134-6666-1000 (L.Q.)
| | | | - Lei Qin
- Correspondence: (C.Z.); (L.Q.); Tel.: +86-188-1045-6266 (C.Z.); +86-134-6666-1000 (L.Q.)
| |
Collapse
|
6
|
Wang C, Gao X, Zheng M, Zhu M, Hou Y. Two-Step Regulation Strategy Improving Stress Transfer and Poling Efficiency Boosts Piezoelectric Performance of 0-3 Piezocomposites. ACS Appl Mater Interfaces 2021; 13:41735-41743. [PMID: 34459186 DOI: 10.1021/acsami.1c12197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rapid development of flexible micropower electronics has aided the opportunity for the broader application of flexible piezoelectric composites (PCs) but has also led to higher requirements for their power generation. Among them, 0-3 PCs with embedded zero-dimension piezoparticle fillers, although low cost and easy to prepare, suffer from suboptimal output performance because of inherent structural defects. In this work, the voltage output was increased from 3.4 to 12.7 V under a force of 7 N, through first-step regulation by aligning the KNbO3 (KN) particles in the polydimethylsiloxane (PDMS) matrix; then, a significantly enhanced current output (from 0.7 to 4.5 μA) through second-step regulation by introducing copper nanorods (Cu NRs) interspersed in the gaps between the KN chains. Consequently, the proposed PC exhibits much higher power density, 37.3 μW/cm2, than that of random KN/PDMS and thus shows good potential for high-performance, flexible piezoelectric energy harvesters.
Collapse
Affiliation(s)
- Chenwei Wang
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Xin Gao
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Mupeng Zheng
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Mankang Zhu
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| | - Yudong Hou
- Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
| |
Collapse
|
7
|
Wang J, Zhong C, Hao S, Wang L. Design and Properties Analysis of Novel Modified 1-3 Piezoelectric Composite. Materials (Basel) 2021; 14:1749. [PMID: 33918159 DOI: 10.3390/ma14071749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 01/20/2023]
Abstract
With the increasing demand for energy exchangers in underwater acoustic equipment, a modified 1-3 piezoelectric composite material is fabricated based on three-component phases. The new material outperforms the traditional two-phase 1-3 structure. Flexible silicone rubber polymer strengthened the piezoelectric composite and the properties of modified 1-3 piezoelectric composite have been tested by method of finite element simulation and experiment, respectively. This modified material has a high electromechanical coupling coefficient; the maximum can reach 0.684 and −3 dB bandwidth is superior to the two-phase 1-3 type. At the same time, the modified phase 1-3 type structure has an excellent decoupling effect. Silicone rubber can reduce the negative coupling vibration of epoxy resin, the vibration model simplification of piezoelectric composite, and the result of the experiment and simulation has good consistency.
Collapse
|
8
|
Yanaseko T, Sato H, Kuboki I, Mossi K, Asanuma H. Vibration Viscosity Sensor for Engine Oil Monitoring Using Metal Matrix Piezoelectric Composite. Materials (Basel) 2019; 12:ma12203415. [PMID: 31635332 PMCID: PMC6829367 DOI: 10.3390/ma12203415] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/04/2019] [Accepted: 10/16/2019] [Indexed: 11/20/2022]
Abstract
Lubricants such as engine oil play an important role in preventing machine wear and damage. Monitoring the deterioration of lubricating oils is a significant technical issue in machine maintenance. In this study, a sensor for monitoring engine oil viscosity was developed using a metal-core piezoelectric fiber/aluminum composite. This composite is a piezoelectric ceramic that is reinforced by a metal matrix; it is expected to be utilized in harsh environments such as the inside of an engine. An active type measurement method was employed to monitor variations in the viscosity of glycerin solution as a model liquid. In this method, a self-generated vibration is correlated to the viscosity of a liquid by measuring the damped vibration amplitude and the variation in the resonance frequency. The results showed that the vibration had a high sensitivity to the liquid viscosity; further, it was observed that the shift in resonance frequency correlated to a wider range of measurable viscosity. Both measured parameters indicate that the metal-core piezoelectric fiber/aluminum composite is a viable sensor for engine oil monitoring.
Collapse
Affiliation(s)
- Tetsuro Yanaseko
- Department of Mechanical Engineering, Kogakuin University, 2665-1, Nakano-cho, Hachioji-shi, Tokyo 192-0015, Japan.
| | - Hiroshi Sato
- Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 302-8564, Japan.
| | - Isao Kuboki
- Department of Mechanical Engineering, Kogakuin University, 2665-1, Nakano-cho, Hachioji-shi, Tokyo 192-0015, Japan.
| | - Karla Mossi
- Mechanical and Nuclear Engineering Department, Virginia Commonwealth University, 401 West Main Street, PO Box 843015, Richmond, VA 23284-3015, USA.
| | - Hiroshi Asanuma
- Department of Mechanical Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
| |
Collapse
|
9
|
Cadel ES, Frazer LL, Krech ED, Fischer KJ, Friis EA. Analysis of how compliant layers and encapsulation affect power generated from piezoelectric stacked composites for bone healing medical devices. J Biomed Mater Res A 2019; 107:2610-2618. [PMID: 31376314 DOI: 10.1002/jbm.a.36767] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/31/2019] [Indexed: 12/16/2022]
Abstract
Use of piezoelectric materials to harvest energy from human motion is commonly investigated. Traditional piezoelectric materials are inefficient at low frequencies but composite structures can increase efficiency at these frequencies. Compliant layer adaptive composite stack (CLACS) is a new piezoelectric PZT (lead zirconate titanate) structure designed for orthopedic implants to use loads generated during walking to provide electrical stimulation for bone healing. The CLACS structure increases power efficiency and structural properties as compared to PZT alone. The purpose of this study was to investigate the effects of compliant layer and encapsulation thicknesses on strain-related parameters for CLACS predicted by finite element models. Percent changes in strain as compliant layer thickness increased were compared to percent changes in power experimentally produced by CLACS given similar geometries and loading conditions. Percent changes in PZT z-strain matched the trends for increases in experimental power, but was not directly proportional. PZT z-strain and radial strain increased as compliant layer and top and bottom encapsulation thickness increased. PZT z-strain and radial strain decreased as side encapsulation thickness increased for a normalized distributed force on the PZT. The overall goal of this study was to inform future design decisions regarding CLACS structures specifically for use in orthopedic implants.
Collapse
Affiliation(s)
- Eileen S Cadel
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas
| | - Lance L Frazer
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas
| | - Ember D Krech
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas
| | - Kenneth J Fischer
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas.,Department of Mechanical Engineering, University of Kansas, Lawrence, Kansas
| | - Elizabeth A Friis
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas.,Department of Mechanical Engineering, University of Kansas, Lawrence, Kansas
| |
Collapse
|
10
|
Abstract
The elastic composite-based piezoelectric energy-harvesting technology is highly desired to enable a wide range of device applications, including self-powered wearable electronics, robotic skins, and biomedical devices. Recently developed piezoelectric composites are based on inorganic piezoelectric fillers and polymeric soft matrix to take advantages of both components. However, there are still limitations such as weak stress transfer to piezoelectric elements and poor dispersion of fillers in matrix. In this report, a highly enhanced piezocomposite energy harvester (PCEH) is developed using a three-dimensional electroceramic skeleton by mimicking and reproducing the sea porifera architecture. This new mechanically reinforced PCEH is demonstrated to resolve the problems of previous reported conventional piezocomposites and in turn induces stronger piezoelectric energy-harvesting responses. The generated voltage, current density, and instantaneous power density of the biomimetic PCEH device reach up to ∼16 times higher power output than that of conventional randomly dispersed particle-based PCEH. This work broadens further developments of the high-output elastic piezocomposite energy harvesting and sensor application with biomimetic architecture.
Collapse
Affiliation(s)
- Yong Zhang
- State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , Wuhan 430070 , China
| | - Huajun Sun
- State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , Wuhan 430070 , China
| | - Chang Kyu Jeong
- Division of Advanced Materials Engineering , Chonbuk National University , Jeonju , Jeollabuk-do 54896 , Republic of Korea
| |
Collapse
|
11
|
Xu M, Kang H, Guan L, Li H, Zhang M. Facile Fabrication of a Flexible LiNbO 3 Piezoelectric Sensor through Hot Pressing for Biomechanical Monitoring. ACS Appl Mater Interfaces 2017; 9:34687-34695. [PMID: 28901736 DOI: 10.1021/acsami.7b10411] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Wearable pressure sensors have attracted increasing attention for biomechanical monitoring due to their portability and flexibility. Although great advances have been made, there are no facile methods to produce sensors with good performance. Here, we present a simple method for manufacturing flexible and self-powered piezoelectric sensors based on LiNbO3 (LN) particles. The LN particles are dispersed in polypropylene (PP) doped with multiwalled carbon nanotubes (MWCNTs) by hot pressing (200 °C) to form a flexible LN/MWCNT/PP piezoelectric composite film (PCF) sensor. This cost-effective sensor has high sensitivity (8 Pa), fast response time (ca. 40 ms), and long-term stability (>3000 cycles). Measurements of pressure changes from peripheral arteries demonstrate the applicability of the LN/MWCNT/PP PCF sensor to biomechanical monitoring as well as its potential for biomechanics-related clinical diagnosis and forecasting.
Collapse
Affiliation(s)
- Muzhen Xu
- Department of Chemistry, Renmin University of China , Beijing 100872, China
| | - Hua Kang
- Department of Chemistry, Renmin University of China , Beijing 100872, China
| | - Li Guan
- Department of Chemistry, Renmin University of China , Beijing 100872, China
| | - Huayi Li
- Institute of Chemistry, The Chinese Academy of Sciences (CAS) , Beijing 100190, China
| | - Meining Zhang
- Department of Chemistry, Renmin University of China , Beijing 100872, China
| |
Collapse
|
12
|
ZHU BP, ZHOU QF, HU CH, SHUNG KK. NOVEL LEAD ZIRCONATE TITANATE COMPOSITE VIA FREEZING TECHNOLOGY FOR HIGH FREQUENCY TRANSDUCER APPLICATIONS. J Adv Dielectr 2011; 1:85-89. [PMID: 21785672 PMCID: PMC3141348 DOI: 10.1142/s2010135x11000112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Novel PZT-5A ceramic-polymer composite was prepared via freezing technology. This composite exhibited good dielectric and ferroelectric behaviors. At 1 kHz, the dielectric constant and the dielectric loss were 546 and 0.046, respectively, while the remnant polarization was 13.0 μC/cm(2) at room temperature. The electromechanical coupling coefficient (k(t)) of PZT-5A composite was measured to be 0.54, which is similar to that of PZT piezoelectric ceramic. The piezoelectric coefficient (d(33)) of PZT-5A composite was determined to be ~250 pC/N. Using this composite, a 58MHz single element transducer with the bandwidth of 70% at -6dB was built, and the insertion loss was tested to be -29dB around the central frequency.
Collapse
|