Effect of compliant layers within piezoelectric composites on power generation providing electrical stimulation in low frequency applications.
Effect of compliant layers within piezoelectric composites on power generation providing electrical stimulation in low frequency applications.
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DOI：
10.1016/j.jmbbm.2018.08.027
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发表时间：
2018-12
影响因子：
3.9
通讯作者：
Friis EA
中科院分区：
文献类型：
--
作者：
Krech ED;Cadel ES;Barrett RM;Friis EA
对于使用烟草或患有糖尿病的患者，骨科手术后的骨愈合具有挑战性。直流电刺激已在临床上成功地显著改善了这些难以融合人群的骨愈合。利用压电材料的能量收集在过去十年中已经变得流行，但是由于材料特性限制了这些频率下的总发电量，因此在低频下具有挑战性。堆叠发电机已被用于在较低电压水平下增加发电，但尚未被广泛探索作为承载生物材料以提供DC刺激。为了匹配结构柔度水平并提高低频下的发电效率，研究了压电盘之间的柔性层的影响。顺应层自适应复合堆叠（CLACS）使用五个并联电连接的PZT盘制造，并且每个盘之间具有低模量环氧树脂层而串联机械堆叠。堆叠被封装，保持PZT和总体积恒定。通过改变负载、频率和电阻对每个电池堆进行机电测试。随着顺应层厚度的增加，发电量在所有负载、频率和测量的电阻上显著增加。正如预期的那样，频率的增加显著增加了所有组的功率输出。类似地，增加所施加的峰间机械负载也显著增加功率输出。CLACS在典型骨科植入物所经历的负载和频率下发电的新用途可以提供一种有效的方法来收集能量并在多个低频应用中提供电力，而无需使用电池。
For patients that use tobacco or have diabetes, bone healing after orthopedic procedures is challenging. Direct current electrical stimulation has shown success clinically to significantly improve bone healing in these difficult-to-fuse populations. Energy harvesting with piezoelectric material has gained popularity in the last decade, but is challenging at low frequencies due to material properties that limit total power generation at these frequencies. Stacked generators have been used to increase power generation at lower voltage levels but have not been widely explored as a load-bearing biomaterial to provide DC stimulation. To match structural compliance levels and increase efficiency of power generation at low frequencies, the effect of compliant layers between piezoelectric discs was investigated. Compliant Layer Adaptive Composite Stacks (CLACS) were manufactured using five PZT discs connected electrically in parallel and stacked mechanically in series with a layer of low modulus epoxy between each disc. The stacks were encapsulated, keeping PZT and overall volume constant. Each stack was electromechanically tested by varying load, frequency, and resistance. As compliant layer thickness increased, power generation increased significantly across all loads, frequencies, and resistances measured. As expected, increase in frequency significantly increased power output for all groups. Similarly, an increase applied peak-to-peak mechanical load also significantly increased power output. The novel use of CLACS for power generation under load and frequencies experienced by typical orthopedic implants could provide an effective method to harvest energy and provide power without the use of a battery in multiple low frequency applications.
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影响因子：
5.3
作者：
Ganesh, SP;Pietrobon, R;Nunley, JA
通讯作者：
Nunley, JA
影响因子：
2.8
作者：
Nam Vo;Wang, Dong;Kang, James
通讯作者：
Kang, James
DOI：
10.2106/00004623-198163010-00002
发表时间：
1981-01-01
影响因子：
5.3
作者：
BRIGHTON, CT;BLACK, J;CONNOLLY, JF
通讯作者：
CONNOLLY, JF
DOI：
10.1002/jbm.820150114
发表时间：
1981-01-01
期刊：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
影响因子：
--
作者：
PARK, JB;KELLY, BJ;COFFEEN, WW
通讯作者：
COFFEEN, WW
DOI：
10.1002/jbm.820140308
发表时间：
1980-01-01
期刊：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
影响因子：
--
作者：
PARK, JB;RECUM, AFV;GRETHER, MF
通讯作者：
GRETHER, MF