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Experimental Study of Vibrational Energy Harvesting Using Electro-Active Paper
Zafar Abas,김흥수,Lindong Zhai,김재환 한국정밀공학회 2015 International Journal of Precision Engineering and Vol.16 No.6
This paper presents an estimation of power output produced by an Electro-Active Paper (EAPap) energy harvesting transducer under base vibration. EAPap is very thin cellulose piezoelectric film, which exhibits a direct piezoelectric effect, when subjected to stress. A 50×50 mm2 EAPap patch was bonded on a 100×50×1 mm3 aluminum cantilever structure. Energy harvesting tests were performed on the energy harvesting transducer, without and with a 2 grams proof mass near the tip of the cantilever beam. The voltage, current and power frequency response functions (FRFs) with respect to the base acceleration are identified and presented. The Voltage FRFs show a monotonic trend with increasing the load resistor from 100 kΩ to 1 MΩ, and the current FRFs also demonstrate monotonic dynamic behavior, but the trend is opposite to the voltage FRFs. In contrast to the voltage and current FRFs, the output power FRFs do not show a monotonic trend, exhibiting the maximum value of 150 μW/g2 at 75.1 Hz without the proof mass. The output power increases to 392 μW/g2 at 62.2 Hz when the proof mass is attached. This preliminary study indicates that EAPap is promising for energy harvesting transducers under vibration environment.
Possibility of cellulose-based electro-active paper energy scavenging transducer.
Abas, Zafar,Kim, Heung Soo,Zhai, Lindong,Kim, Jaehwan,Kim, Joo Hyung American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.10
<P>In this paper, a cellulose-based Electro-Active Paper (EAPap) energy scavenging transducer is presented. Cellulose is proven as a smart material, and exhibits piezoelectric effect. Specimens were prepared by coating gold electrodes on both sides of cellulose film. The fabricated specimens were tested by a base excited aluminum cantilever beam at resonant frequency. Different tests were performed with single and multiple parallel connected electrodes coated on the cellulose film. A maximum of 131 mV output voltage was measured, when three electrodes were connected in parallel. It was observed that voltage output increases significantly with the area of electrodes. From these results, it can be concluded that the piezoelectricity of cellulose-based EAPap can be used in energy transduction application.</P>
Study on the vibrational energy harvester using piezo paper
Zafar Abas(자파르 아바스),Heung Soo Kim(김흥수),Zhao Lindong(적림동),Jaehwan Kim(김재환),Joo Hyung Kim(김주형) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Electro-active paper has been revealed to be a smart material with excellent properties which exhibit piezoelectric effect as actuation mechanism and is biodegradable and biocompatible. The application of electro-active paper as an actuator has been studied. Electro-active paper is very flexible as compared to other piezoelectric materials and it can be used with any piezo bender which makes it suitable for harvesting energy using ambient vibration. In the present research an attempt is made to evaluate the energy harvesting capabilities of EAPap using direct piezoelectric effect under a state of vibration. The EAPap cantilever beam specimens are fabricated with a series of processes and electrodes are deposited with electrode deposition technique. The EAPap cantilever beam structure is excited under input vibration. From the experimental results it is observed that a significantly open AC output voltage is achievable.