Wu Xun, Gao Naiwei, Zheng Xiaoting, Tao Xinglei, He Yonglin, Liu Zhiping, Wang Yapei
Department of Chemistry, Renmin University of China, Beijing 100872, People's Republic of China.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
ACS Appl Mater Interfaces. 2020 Jun 17;12(24):27691-27699. doi: 10.1021/acsami.0c04798. Epub 2020 Jun 3.
Early fire alarming is of vital importance to lower the damages led by forest fires. Thus far, methods to monitor the forest fires at their early stage are mainly focused on artificial ground patrol, unmanned aerial vehicle cruise monitoring, observation by watchtower, or satellite inspection, whereas these methods are practically encountered with the problems of untimely feedback before the forest fires are out of control. This work proposes a particular kind of self-powered, low-cost, and green thermoelectric paper chips based on the principle of self-assembly and disassembly of ionic liquids on the surface of gold electrodes. By adjustment of the species of ionic liquids, both "n- and p-type" thermoelectric behaviors have been exploited that correspond to the opposite open-circuit voltages. Owing to the fluidic nature of ionic liquids, those "n- and p-type" thermoelectric units can be readily connected in series on one paper chip, leading to remarkable voltage signals in the presence of the temperature difference of 35 K. Followed by signal acquisition and transmission, such a thermoelectric paper chip successfully affords immediate electrical alarming at the early stage of an afire circumstance.
早期火灾报警对于降低森林火灾造成的损失至关重要。到目前为止，森林火灾早期监测方法主要集中在人工地面巡逻、无人机巡航监测、瞭望塔观测或卫星检测上，然而这些方法在实际应用中存在森林火灾失控前反馈不及时的问题。这项工作基于离子液体在金电极表面的自组装和拆卸原理，提出了一种特殊的自供电、低成本且绿色的热电纸芯片。通过调整离子液体的种类，开发出了对应相反开路电压的“n型”和“p型”两种热电行为。由于离子液体的流体性质，那些“n型”和“p型”热电单元可以很容易地在一个纸芯片上串联连接，在存在35K温差的情况下产生显著的电压信号。经过信号采集和传输，这种热电纸芯片在火灾情况下能够在早期成功实现即时电报警。
