Gold nanoparticle-cellulose/PDMS nanocomposite: a flexible dielectric material for harvesting mechanical energy.
Gold nanoparticle-cellulose/PDMS nanocomposite: a flexible dielectric material for harvesting mechanical energy.
复制标题
作者：
纤维素是一种丰富的天然压电聚合物，也是一种重要的可再生资源。在这里，在这项工作中，我们实现了增强的压电响应与纤维素在聚二甲基硅氧烷（PDMS）矩阵通过形成纳米复合材料的结合金纳米粒子（Au NPs）。在Au NP-纤维素/PDMS纳米复合材料中，由于单独纤维素的存在，记录了介电常数的增强，并且由于Au NP的存在，发现了介电损耗的降低。这开启了从当前研究的纳米复合材料实现纳米电介质材料的可能性。这也表明了纳米复合材料在能源转换应用方面的巨大潜力。随后，使用Au NP-纤维素/PDMS纳米复合材料制造机械能收集装置，其被命名为压电纳米发电机（PNG）。PNG在不进行任何电极化步骤的情况下，提供了10.6 V的增强开路电压、10.700 nA的短路电流和8.34 mW m−2的峰值功率密度。PNG可以在677 s内将10 μF电容充电至6.3 V，并可以同时点亮两个商用蓝光发光二极管（LED）。PNG表现出1.8%的良好能量转换效率。还示出了PNG的触摸传感器应用。本文报道了一种基于纳米金-纤维素/聚二甲基硅氧烷的压电纳米发电器。PNG的效率为1.8%。它可以点亮LED并感应手指触摸。
Cellulose is an abundant natural piezoelectric polymer and is also a renewable resource of significant importance. Here in this work we realize an enhanced piezoelectric response with cellulose in a polydimethylsiloxane (PDMS) matrix by forming a nanocomposite with the incorporation of gold nanoparticles (Au NPs). In the Au NP–cellulose/PDMS nanocomposite an enhancement in the dielectric constant is recorded due to the presence of cellulose alone and a reduction of dielectric loss is found owing to the presence of Au NPs. This opens the possibility of realizing a nanodielectric material from the nanocomposite under current study. This also indicates the significant potential of the nanocomposite towards energy conversion applications. Subsequently, a mechanical energy harvesting device was fabricated using the Au NP–cellulose/PDMS nanocomposite, which is named as a piezoelectric nanogenerator (PNG). The PNG delivered an enhanced open circuit voltage of ∼6 V, short circuit current of ∼700 nA and a peak power density of 8.34 mW m−2 without performing any electrical poling steps. The PNG could charge a 10 μF capacitor to 6.3 V in 677 s and could light two commercial blue light emitting diodes (LEDs) simultaneously. The PNG exhibited a good energy conversion efficiency of 1.8%. A touch sensor application of the PNG is also shown. A gold nanoparticle–cellulose/PDMS based piezoelectric nanogenerator (PNG) is reported in this work. The PNG delivers an efficiency of 1.8%. It can light LEDs and sense finger touch.
登录
查看更多内容
影响因子：
5.7
作者：
Alexandrescu, Laura;Syverud, Kristin;Chinga-Carrasco, Gary
通讯作者：
Chinga-Carrasco, Gary
影响因子：
3.6
作者：
Carponcin, Delphine;Dantras, Eric;Lacabanne, Colette
通讯作者：
Lacabanne, Colette
影响因子：
17.1
作者：
Chen, Chih-Yen;Zhu, Guang;Wang, Zhong Lin
通讯作者：
Wang, Zhong Lin
影响因子：
13.3
作者：
Kumar, Ashavani;Gullapalli, Hemtej;Ajayan, Pulickel M.
通讯作者：
Ajayan, Pulickel M.
影响因子：
9.5
作者：
Alam, Md. Mehebub;Mandal, Dipankar
通讯作者：
Mandal, Dipankar