Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
ACS Appl Mater Interfaces. 2017 Oct 4;9(39):34286-34293. doi: 10.1021/acsami.7b11740. Epub 2017 Sep 22.
Stress-responsive, highly flexible, and breathable nanocomposite sponges show an electrical conductivity from 1.7 to 166.6 S/cm depending on the applied stress. Key for the responsive electrical conductivity of the sponges is the change of percolation of the silver nanowires. These sponges made of short electrospun fibers and silver nanowires could be applied without any amplifier for the operation of automobile bulbs and as an efficient Joule heater. The time required for electric heating (current on) and cooling is very short. Interestingly, the maximum temperature reached by electric heating depends on the compression status. The higher the compression status, the lower is the maximum temperature, which is in accordance with the understanding of Joule heaters. It is noteworthy that these sponges are thermally, chemically, and mechanically very stable. These conductive sponges will open a new area for novel conductive devices with relevance for real-world applications.
具有应激响应、高弹性和透气性的纳米复合海绵在不同的压力下表现出 1.7 到 166.6 S/cm 的电导率。海绵响应性电导率的关键在于银纳米线的渗滤变化。这些由短电纺纤维和银纳米线组成的海绵可用于汽车灯泡的运行，无需任何放大器，并且可用作高效的焦耳加热器。电加热（通电）和冷却所需的时间非常短。有趣的是，电加热达到的最高温度取决于压缩状态。压缩状态越高，最高温度越低，这与焦耳加热器的理解一致。值得注意的是，这些海绵在热、化学和机械方面非常稳定。这些导电海绵将为具有实际应用相关性的新型导电设备开辟新领域。
