Mesoporous Piezoelectric Polymer Composite Films with Tunable Mechanical Modulus for Harvesting Energy from Liquid Pressure Fluctuation.
Mesoporous Piezoelectric Polymer Composite Films with Tunable Mechanical Modulus for Harvesting Energy from Liquid Pressure Fluctuation.
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DOI：
10.1002/adfm.201602624
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发表时间：
2016-10-04
影响因子：
19
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Zhang Z;Yao C;Yu Y;Hong Z;Zhi M;Wang X
从生物系统中获取机械能具有在体内为可植入电子设备供电的巨大潜力。本文报道了一种基于介孔聚偏氟乙烯（PVDF）薄膜的柔性压电纳米发电机（NG）。采用无模板溶胶-凝胶法在室温下制备了整体式介孔聚偏氟乙烯（PVDF）。通过用聚二甲基硅氧烷（PDMS）弹性体填充PVDF网络的孔隙，复合材料的模量在很宽的范围内有效地调节到生物系统的相同水平。NG与周围生物组分之间的模量的紧密匹配对于实现实际整合至关重要。在变形时，复合NG表现出与其他PVDF基NG相当或更高的可观的压电输出。使用PDMS与内部集成的复合NG制造人工动脉系统。成功地证明了从液体压力波动（模拟血压波动）中有效地获取能量。这种简单有效的方法制备出具有可调力学性能的介孔PVDF，为自供电植入式器件的发展提供了一条很有前途的途径。
Harvesting mechanical energy from biological systems possesses great potential for in vivo powering implantable electronic devices. In this paper, a development of flexible piezoelectric nanogenerator (NG) is reported based on mesoporous poly(vinylidene fluoride) (PVDF) films. Monolithic mesoporous PVDF is fabricated by a template-free sol–gel-based approach at room temperature. By filling the pores of PVDF network with poly(dimethylsiloxane) (PDMS) elastomer, the composite’s modulus is effectively tuned over a wide range down to the same level of biological systems. A close match of the modulus between NG and the surrounding biological component is critical to achieve practical integration. Upon deformation, the composite NG exhibits appreciable piezoelectric output that is comparable to or higher than other PVDF-based NGs. An artificial artery system is fabricated using PDMS with the composite NG integrated inside. Effective energy harvesting from liquid pressure fluctuation (simulating blood pressure fluctuation) is successfully demonstrated. The simple and effective approach for fabricating mesoporous PVDF with tunable mechanical properties provides a promising route toward the development of self-powered implantable devices.