• 专利标题:   Preparing cellulose-graphene aerogel material for gas detection, involves adding sodium hydroxide and urea to water, preparing cellulose-graphene oxide aqueous solution, and immersing cellulose-graphene oxide hydrogel in vitamin C solution.
  • 专利号:   CN110790974-A
  • 发明人:   QI H, CHEN Y, LIU D, LV F
  • 专利权人:   UNIV SOUTH CHINA TECHNOLOGY
  • 国际专利分类:   C08J009/28, C08K003/04, C08L001/02, G01N027/04
  • 专利详细信息:   CN110790974-A 14 Feb 2020 C08J-009/28 202020 Pages: 7 Chinese
  • 申请详细信息:   CN110790974-A CN11164830 25 Nov 2019
  • 优先权号:   CN11164830

▎ 摘  要

NOVELTY - Preparing cellulose-graphene aerogel material involves adding sodium hydroxide and urea to water and stirring uniformly to obtain an aqueous solution of sodium hydroxide/urea. The aqueous solution of sodium hydroxide/urea is pre-cooled, cellulose is added and stirred to obtain a cellulose solution. Graphene oxide is added to water and stirred uniformly to obtain an aqueous solution of graphene oxide. The aqueous solution of graphene oxide to cellulose solution, and stirred to obtain a cellulose-graphene oxide aqueous solution. The cellulose-graphene oxide aqueous solution is cast into a film, immersed in a dilute sulfuric acid solution to perform a coagulation bath treatment and to obtain cellulose-graphene oxide hydrogel, and washed. The cellulose-graphene oxide hydrogel is immersed in an aqueous solution of vitamin C for in-situ reduction treatment. A cellulose-graphene hydrogel is obtained, washed, and freeze-dried to obtain the cellulose-graphene aerogel material. USE - Method for preparing cellulose-graphene aerogel material used in the field of gas detection (claimed). ADVANTAGE - The has low dependence on equipment, simple process and convenient operation and imparts no pollution to the environment. The obtained aerogel material has different sensitivities in different volatile vapors.