Stiff-Soft synergistic aerogel fibers/nanonets triggered stretchable fiber/graphene oxide meta-aerogel for high-performance personal heating
High-performance aerogel materials are highly desired for maintaining human thermal comfort in extremely cold environments. However, developing such materials that are both lightweight, mechanically robust, and capable of warming up human body remains a formidable challenge. Herein, a stretchable meta -aerogel with topological aerogel fibers/nanonetworks (nanonets) structure is directly synthesized via three-dimensional (3D) electro-spinning/netting self-assembly strategy. Manipulation of the deformation and phase transition of the charged liquids ejected from Taylor cone enables the formation of topological entangled dual-networks consisting of stiff aerogel fibers and soft self-assembled nanonets. The resulting meta -aerogel demonstrates remarkable structural stability with large stretchability (exceeding 2000 times its own weight), high resilience to 1000 cycles of 30 % tensile strain, 1000 cycles of 60 % compressive strain, and low temperature elastic recovery ability (−196 ℃). Benefiting from the hierarchical pores composed of aerogel fibers, nanonets, and pores between fibers, the meta -aerogel combines lightweight density (4.8 mg cm −3 ) and reliable low thermal conductivity (24.3 mW m −1 K −1 ). Moreover, this meta -aerogel integrates reproducible passive and active heating capabilities that can heat human skin by 4.1 ℃, making it an attractive candidate for all-day and indoor/outdoor personal heating. This work may provide a significant boost to the fibrous aerogel for various applications.
危险品化学品经营许可证（带存储）