journal article·2022-05-04

Ultralight Heat-Insulating, Electrically Conductive Carbon Fibrous Sponges for Wearable Mechanosensing Devices with Advanced Warming Function

Qiang Gao, Thomas Tran, Xiaojian Liao, Sabine Rosenfeldt, Chao Gao, Haoqing Hou, Markus Retsch, Seema Agarwal, Andreas Greiner

ACS Applied Materials & Interfaces· Volume 14· Issue 17
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Abstract

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–1 and a low thermal conductivity of 0.027–0.038 W m–1 K–1 (20 °C, in ambient air), as well as a low density to ∼6 mg cm–3. 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.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Supercapacitor Materials and Fabrication · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Institute of Applied Mechanics, State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China

College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China

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