• 专利标题:   Preparing oxidized graphene/cellulose-based composite hydrogel used as heavy metal ion adsorbent, by mixing oxidized graphene suspension and cellulose solution, obtaining solidified product, washing and freeze-drying.
  • 专利号:   CN106188576-A, CN106188576-B
  • 发明人:   LI W, ZHOU L
  • 专利权人:   UNIV TIANJIN TECHNOLOGY
  • 国际专利分类:   B01J020/24, B01J020/28, C08J003/075, C08K003/04, C08L001/02
  • 专利详细信息:   CN106188576-A 07 Dec 2016 C08J-003/075 201721 Pages: 14 Chinese
  • 申请详细信息:   CN106188576-A CN10576004 19 Jul 2016
  • 优先权号:   CN10576004

▎ 摘  要

NOVELTY - Preparation of oxidized graphene/cellulose-based composite hydrogel involves mixing oxidized graphene and 4-methylmorpholine-N-oxide, stirring to prepare oxidized graphene suspension, dissolving cellulose in 4-methylmorpholine-N-oxide to obtain cellulose solution, mixing oxidized graphene suspension and cellulose solution to prepare mixed solution, adding deionized water to obtain solidified product, washing solidified product to remove 4-methylmorpholine-N-oxide and freeze-drying. USE - Preparation of oxidized graphene/cellulose-based composite hydrogel used as heavy metal ion adsorbent (claimed). ADVANTAGE - The method enables simple and environmentally-friendly preparation of oxidized graphene/cellulose-based composite hydrogel with three-dimensional network structure and improved mechanical performance. The composite hydrogel ensures easy separation, recovery and adsorption of heavy metal ions. DETAILED DESCRIPTION - Preparation of oxidized graphene/cellulose-based composite hydrogel involves mixing oxidized graphene and 4-methylmorpholine-N-oxide, stirring at 100-120 degrees C to prepare an oxidized graphene suspension, dissolving cellulose in 4-methylmorpholine-N-oxide to obtain cellulose solution, mixing oxidized graphene suspension and cellulose solution at 100-120 degrees C for 6-8 hours to prepare a mixed solution, adding deionized water in a volume ratio of 4-6:1, leaving still for 8-12 hours to obtain solidified product, washing solidified product with deionized water to remove 4-methylmorpholine-N-oxide and freeze-drying at -40 degrees C to 60 degrees C.