Qiu Jiaheng, Niu Min, Su Lei, Lu De, Peng Kang, Wang Hongjie
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
ACS Appl Mater Interfaces. 2025 Jul 30;17(30):43255-43263. doi: 10.1021/acsami.5c09931. Epub 2025 Jul 22.
Aerogel fibers have attracted significant interest due to their low thermal conductivity and notable flexibility. This flexibility enables them to be bent, tied, and woven into fabrics, thereby broadening their applications. However, current aerogel fibers suffer from limited environmental stability and a complex manufacturing process. Herein, a novel rotation lifting and spinning method is proposed to fabricate continuous and flexible ceramic aerogel fibers using ceramic nanowires and ethanol as the starting materials. The synthesized SiN aerogel fiber (SNAF), composed of SiN nanowires, achieves a high porosity of 98.5% and notable tensile strength reaching 3.5 MPa. Moreover, the fiber exhibits high thermal insulation capabilities, fire resistance, and remarkable high-temperature stability, which maintains its high strength and flexibility over a wide temperature range from -196 to 1000 °C. This study makes progress in the synthesis of ceramic aerogel fibers and broadens their applications in various high-temperature scenarios.
气凝胶纤维因其低导热性和显著的柔韧性而备受关注。这种柔韧性使它们能够被弯曲、打结并编织成织物，从而拓宽了其应用范围。然而，目前的气凝胶纤维存在环境稳定性有限和制造工艺复杂的问题。在此，提出了一种新颖的旋转提拉纺丝方法，以陶瓷纳米线和乙醇为起始原料制备连续且柔韧的陶瓷气凝胶纤维。由SiN纳米线组成的合成SiN气凝胶纤维（SNAF）具有98.5%的高孔隙率和高达3.5 MPa的显著拉伸强度。此外，该纤维具有高隔热能力、耐火性和显著的高温稳定性，在从-196到1000°C的宽温度范围内保持其高强度和柔韧性。这项研究在陶瓷气凝胶纤维的合成方面取得了进展，并拓宽了它们在各种高温场景中的应用。
