Potassium sodium niobate lead-free piezoelectric nanocomposite generators based on carbon-fiber-reinforced polymer electrodes for energy-harvesting structures

2020 ◽  
Vol 199 ◽  
pp. 108331 ◽  
Author(s):  
Zhenjin Wang ◽  
Hiroki Kurita ◽  
Hiroaki Nagaoka ◽  
Fumio Narita
Keyword(s):  
Carbon Fiber ◽  
Energy Harvesting ◽  
Fiber Reinforced Polymer ◽  
Lead Free ◽  
Carbon Fiber Reinforced Polymer ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Potassium Sodium ◽  
Reinforced Polymer ◽  
Polymer Electrodes

scholarly journals Evaluation of Electromechanical Properties and Conversion Efficiency of Piezoelectric Nanocomposites with Carbon-Fiber-Reinforced Polymer Electrodes for Stress Sensing and Energy Harvesting

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3184
Author(s):  
Yaonan Yu ◽  
Fumio Narita
Keyword(s):  
Carbon Fiber ◽  
Conversion Efficiency ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Potassium Sodium Niobate ◽  
Reinforced Polymer ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced ◽  
Stress Sensing

Wireless sensor networks are the future development direction for realizing an Internet of Things society and have been applied in bridges, buildings, spacecraft, and other areas. Nevertheless, with application expansion, the requirements for material performance also increase. Although the development of carbon-fiber-reinforced polymer (CFRP) to achieve these functions is challenging, it has attracted attention because of its excellent performance. This study combined the CFRP electrode with epoxy resin containing potassium sodium niobate piezoelectric nanoparticles and successfully polarized the composite sample. Furthermore, a three-point bending method was applied to compare the bending behavior of the samples. The peak output voltage produced by the maximum bending stress of 98.4 MPa was estimated to be 0.51 mV. Additionally, a conversion efficiency of 0.01546% was obtained. The results showed that the piezoelectric resin with CFRPs as the electrode exhibited stress self-inductance characteristics. This study is expected to be applied in manufacturing self-sensing piezoelectric resin/CFRP composite materials, paving the way for developing stable and efficient self-sensing structures and applications.

High-performance piezoelectric-energy-harvester and self-powered mechanosensing using lead-free potassium–sodium niobate flexible piezoelectric composites

2018 ◽  
Vol 6 (34) ◽  
pp. 16439-16449 ◽  
Author(s):  
Mengjun Wu ◽  
Ting Zheng ◽  
Haiwu Zheng ◽  
Jifang Li ◽  
Weichao Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
High Performance ◽  
Energy Harvester ◽  
Lead Free ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Piezoelectric Composites ◽  
Potassium Sodium ◽  
Piezoelectric Energy ◽  
Self Powered

A flexible piezoelectric nanogenerator (PENG) was fabricated based on a new inorganic piezoelectric KNN–BNZ–AS–Fe, which exhibited the great potential in energy harvesting and self-powered mechanosensing.

Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips

2019 ◽  
Vol 7 (1) ◽  
pp. 30-34
Author(s):  
A. Ajwad ◽  
U. Ilyas ◽  
N. Khadim ◽  
Abdullah ◽  
M.U. Rashid ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Control Beam ◽  
Reinforced Polymer ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.

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