Macromolecular Chemistry II and Bavarian Polymer Institute, Department of Chemistry, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany.
Bavarian Center for Battery Technology (BayBatt), Bavarian Polymer Institute, and Bayreuth Center for Colloids and Interfaces, Department of Chemistry, Physical Chemistry I, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany.
ACS Appl Mater Interfaces. 2022 May 4;14(17):19918-19927. doi: 10.1021/acsami.2c04136. Epub 2022 Apr 22.
Ultralight highly porous sponges are attractive for electronic devices due to superelasticity, outstanding resilience, and thermal insulation. However, fabricating an ultralight conductive sponge with low thermal conductivity, mechanical flexibility, and piezoresistivity, as well as adjustable heating behavior, is still a challenge. Here, an ultralight carbon nanofibrous sponge fabricated by pyrolyzing a graphene oxide coated polyimide sponge is reported. The resulting carbon sponge demonstrates a high electrical conductivity of 0.03-4.72 S m and a low thermal conductivity of 0.027-0.038 W m K (20 °C, in ambient air), as well as a low density to ∼6 mg cm. Additionally, the sponge exhibits mechanical flexibility, stability, excellent piezoresistivity, and an adjustable heating behavior. Hence, it could be utilized as a sensing device, including thermal management, making them promising for use in smart sportswear, human-machine interfaces, and wearable healthcare devices.
超轻高多孔海绵因其超弹性、出色的弹性和绝热性能而受到电子设备的青睐。然而，制造具有低热导率、机械柔韧性、压阻性以及可调节加热行为的超轻导电线型海绵仍然是一个挑战。在这里，我们报道了一种通过热解氧化石墨烯涂覆的聚酰亚胺海绵制备的超轻碳纤维海绵。所得到的碳海绵表现出高电导率 0.03-4.72 S m 和低热导率 0.027-0.038 W m K（20°C，在环境空气中），以及低密度约 6 mg cm。此外，该海绵具有机械柔韧性、稳定性、优异的压阻性和可调节的加热行为。因此，它可以用作传感装置，包括热管理，使其有望用于智能运动服装、人机界面和可穿戴医疗设备。
