• 专利标题:   Preparing chitosan-titanium compound composite magnetic graphene by mixing lithium salt powder and acidic solvent, adding titanium compound powder, centrifuging, dispersing in strong acid solution, adding chitosan, graphene and magnetic element covalent compound and ultrasonically treating.
  • 专利号:   CN113480785-A
  • 发明人:   LI S, CHEN C, WANG Z
  • 专利权人:   INNER MONGOLIA YUANCI NEW MATERIAL TECHNOLOGY CO LTD
  • 国际专利分类:   H05K009/00, C08K003/04, C08L005/08
  • 专利详细信息:   CN113480785-A 08 Oct 2021 C08L-005/08 202104 Chinese
  • 申请详细信息:   CN113480785-A CN10938423 16 Aug 2021
  • 优先权号:   CN10938423

▎ 摘  要

NOVELTY - Preparing a chitosan-titanium compound composite magnetic graphene involves (i) uniformly stirring and mixing a lithium salt powder and an acidic solvent, adding a titanium compound powder to the reaction solution and stirring under oil bath condition to obtain a dark red liquid, (ii) (a) dispersing the dark red liquid (b) adding a solvent, centrifuging and taking the supernatant, and (c) repeating the step (b) to obtain a light red liquid, (iii) adding ethanol to centrifuge to obtain a dark green supernatant containing titanium compound nanosheets, (iv) adding the dark green supernatant to a strong acid solution, ultrasonically vibrating and dispersing to obtain a green suspension, (v) adding chitosan and graphene to the green suspension, then adding a magnetic element covalent compound and stirring to obtain a mixed solution, and (vi) ultrasonically treating the mixed solution, collecting the solid product by a magnet, washing and drying. USE - Method for preparing a chitosan-titanium compound composite magnetic graphene. ADVANTAGE - The method solves the problems of poor wave absorption energy and narrow effective absorption frequency band of the existing single magnetic graphene. DETAILED DESCRIPTION - Method for preparing a chitosan-titanium compound composite magnetic graphene, involves (i) uniformly stirring and mixing a lithium salt powder and an acidic solvent to obtain a reaction solution, adding a titanium compound powder to the reaction solution under stirring conditions and stirring for 24-48 hours under the condition of oil bath at 35-40degrees Celsius to obtain a dark red liquid, where the volume ratio of the mass of the lithium salt powder to the acidic solvent is 1 g:(10-50) ml, and the mass ratio of the lithium salt powder to the titanium compound powder is 1:(1-5), (ii) (a) dispersing the dark red liquid by ultrasonic vibration for 0.5-1 hour, (b) adding a solvent, centrifuging and taking the supernatant, and (c) repeating the step (b) for 5-10 times, until the pH value of the supernatant reaches 6-6.5 to obtain a light red liquid, (iii) adding ethanol to centrifuge the light red liquid for 10-20 times to obtain a dark green supernatant containing titanium compound nanosheets, (iv) adding the dark green supernatant containing the titanium compound nanosheets to a strong acid solution, ultrasonically vibrating and dispersing for 0.5-1 hour to obtain a green suspension, where the volume ratio of the dark green supernatant containing the titanium compound nanosheets to the strong acid solution is 1: (0.1-1), (v) adding chitosan and graphene to the green suspension, and then adding a magnetic element covalent compound and stirring for 24-48 hours to obtain a mixed solution, where the mass ratio of the chitosan to the volume of the green suspension is 1 g:(50-200) ml, the mass ratio of the graphene to the volume of the green suspension is 1 g:(20-100) ml, and the mass ratio of the magnetic element covalent compound to the volume of the green suspension is 1 g:(100-500) ml, and (vi) ultrasonically treating the mixed solution for 0.5-1 hour, collecting the solid product by a magnet, washing with deionized water and drying to obtain the product.