#科技头条#【这可能是物联网时代的发电原材料?】

#科技头条#【这可能是物联网时代的发电原材料?】近日,研究人员发布了碳纳米管纱线装置,其是利用压电效应,即材料能在施加机械应力产生电荷后,更紧密地与电活性聚合物(一种人工肌肉)联系在一起。以12赫兹的频率拉伸纤维,每公斤纱线可以产能56瓦特。在此基础上,31毫克纱线可以实现在半径100米的范围内每10秒发送一个两字节的数据包。该材料将被证明能有效地在物联网应用程序中为传感器节点供电。http://spectrum.ieee.org/nanoclast/semiconductors/materials/nanotubebased-yarns-harvest-energy-from-twisting-and-stretching

Nanotube-Based Yarns Harvest Energy From Twisting and Stretching

12

An international team of researchers led by researchers at the University of Texas (UT) at Dallas—where they have been working on making carbon nanotube-based yarns for well over a decade—has devised a way to make these carbon nanotube yarns into devices that can harvest energy from stretching or twisting them.

In research described in the journal Science, the initial results show promise for immediate use in powering small sensor nodes in Internet of Things (IoT) applications. The team says its nanotube yarns could produce larger amounts of energy by flexing and twisting in response to the movement of ocean waves.

While it appears as though these nanotube yarns are exploiting a piezoelectric effect, in which a material can generate an electric charge in response to applied mechanical stress, the yarn’s behavior makes it more closely tied to so-called electroactive polymers (EAPs), which are a kind of artificial muscle.

“Basically what's happening is when we stretch the yarn, we're getting a change in capacitance of the yarn. It’s that change that allows us to get energy out,” explains Carter Haines, associate research professor at UT Dallas and co-lead author of the paper describing the research, in an interview with IEEE Spectrum.

PAGES: 1 2


Comments are closed.



无觅相关文章插件