Ultralight M5 Aerogels with Superior Thermal Stability and Inherent Flame Retardancy.

Autor: Hu P; School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China.; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.; Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, 8600, Empa, Dübendorf, Switzerland., Ge S; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China., Dou S; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.; School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China., Lv Z; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.; School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China., Li M; Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, 8600, Empa, Dübendorf, Switzerland., Zhao Z; Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, 8600, Empa, Dübendorf, Switzerland., Zhang P; School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China., Wang J; Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.; School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China., Sun Z; School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2024 Sep 11, pp. e202401062. Date of Electronic Publication: 2024 Sep 11.
DOI: 10.1002/cssc.202401062
Abstrakt: Ultra-lightweight materials often face the formidable challenge of balancing their low density, high porosity, high mechanical stiffness, high thermal and environmental stability, and low thermal conductivity. This study introduces an innovative method for synthesizing high-performance polymer aerogels to address the challenge. Specifically, we detail the production of poly (2,5-dihydroxy-1,4-phenylene pyridine diimidazole) (PIPD or M5) aerogels. This process involves chemically stripping M5 "super" fibers into nanofibers, undergoing a Sol-Gel transition, followed by freeze-drying and subsequent thermal annealing. The M5 aerogels excel beyond existing polymer aerogels, boasting an ultralight density of 6.03 mg cm -3 , superior thermal insulation with thermal conductivity at 32 mW m -1  K -1 , inherent flame retardancy (LOI=50.3 %), 80 % compression resilience, a high specific surface area of 462.1 m 2  g -1 , and outstanding thermal stability up to 463 °C. These multi-faceted properties position the M5 aerogel as a front-runner in lightweight insulation materials, demonstrating the strategic use of high-performance polymer assembly units in aerogel design.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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