• 专利标题:   Graphene-silicon-based aerogel used in e.g. energy storage and conversion, and sensor, is formed by covalently crosslinking and fully recovering original size of double network structure under strain, and has preset density, specific surface area and contact angle.
  • 专利号:   CN114436269-A
  • 发明人:   HU D, DING C, HUANG X, ZHANG L, SHAO G
  • 专利权人:   UNIV NANJING INFORMATION SCI TECHNOLOG
  • 国际专利分类:   C01B032/184, C01B033/152, C01B033/158
  • 专利详细信息:   CN114436269-A 06 May 2022 C01B-033/158 202264 Chinese
  • 申请详细信息:   CN114436269-A CN11544825 16 Dec 2021
  • 优先权号:   CN11544825

▎ 摘  要

NOVELTY - A graphene-silicon-based aerogel is formed by covalently crosslinking and fully recovering the original size of double network structure under strain of less than or equal to 50%, and has a density of greater than or equal to 4.6 mg/m3, a specific surface area of greater than 75.3 m2/g and a contact angle of greater than 128degrees. USE - The graphene-silicon-based aerogel is useful in environmental remediation, energy storage and conversion, thermal management, sensor and electromagnetic wave absorption application. ADVANTAGE - The graphene-silicon-based aerogel forms double network structure through covalent crosslinking, has ultra-low density, and excellent flexibility, versatility, hydrophobicity and compression resilience performance due to its unique network structure, excellent thermal insulation performance in high humidity and high temperature environment, and high-efficiency adsorption performance and oil-water separation performance for oil or organic solvent, and can be produced with high efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene-silicon-based aerogel, which involves: (S1) weighing hexadecyltrimethylammonium bromide powder, methyltrimethoxysilane and gamma-aminopropyldiethoxymethylsilane, stirring and uniformly mixing to obtain mixed solution (A); (S2) titrating solution (A) into a graphene oxide aqueous solution added with a sodium hydroxide solution under an ice bath condition, uniformly stirring, transferring to a container, placing in an oven at 95degrees Celsius for sealing and storing for 3 days to obtain reduced graphene oxide-based hydrogel; (S3) aging the graphene-based hydrogel, freezing at -20degrees Celsius to -80degrees Celsius for 12-24 hours, taking out the graphene-based hydrogel, and drying in a freeze dryer for 12-72 hours to obtain reduced graphene oxide-based aerogel; and (S4) heating the aerogel at a heating rate of 3degrees Celsius/minute to 300degrees Celsius, heat-preserving for 10 hours in a protective atmosphere, and then naturally cooling.