• 专利标题:   Preparing double-layer flexible composite film with strong microwave absorption performance, comprises e.g. adding ferric chloride hexahydrate and nickel chloride hexahydrate into graphene oxide suspension, adding aqueous ammonia, heating, stirring, and mixing with aqueous polyurethane emulsion.
  • 专利号:   CN114702716-A
  • 发明人:   WU H, WAN J, RUAN S
  • 专利权人:   UNIV ZHEJIANG SCITECH
  • 国际专利分类:   C08J007/044, C08K003/04, C08K003/24, C08L075/04, C09D125/18, C09D165/00, C09D005/24
  • 专利详细信息:   CN114702716-A 05 Jul 2022 C08J-007/044 202293 Chinese
  • 申请详细信息:   CN114702716-A CN10414095 20 Apr 2022
  • 优先权号:   CN10414095

▎ 摘  要

NOVELTY - Preparing double-layer flexible composite film with strong microwave absorption performance, comprises (i) taking glycol as solvent, dispersing graphene oxide dispersion in glycol, ultrasonically processing, forming homogeneous solution, i.e., graphene oxide suspension; (ii) adding ferric chloride hexahydrate and nickel chloride hexahydrate into graphene oxide suspension, then adding aqueous ammonia, heating and stirring; (iii) mixing the mixed solution obtained in step (ii) with aqueous polyurethane emulsion, stirring, then ultrasonically dispersing, and degassing under nitrogen atmosphere; (iv) casting the solution obtained in the step (iii) on a flat surface, drying and molding to obtain film; (v) taking poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) aqueous solution mixed with dimethyl sulfoxide and aqueous polyurethane emulsion, and stirring the mixed solution; and (vi) dripping the solution obtained in step (v) on the film, and drying the dropped film. USE - Preparation method of double-layer flexible composite film with strong microwave absorption performance. ADVANTAGE - The method provides double-layer flexible composite film with excellent wave-absorbing performance.