• 专利标题:   Producing graphene or graphene-like material, comprises dispersing particles of crystalline graphitic material in solvent or surfactant mixtures, submitting mixture to a cavitation force, and submitting mixture to high shear agitation.
  • 专利号:   WO2017025926-A1, CA2995433-A1, EP3334686-A1, US2018229193-A1
  • 发明人:   FONSECA FERREIRA DA SILVA R, MARQUES ABRANTES V E, REIS FIGUEIREDO B, MARQUES A V E, REIS F B, FONSECA F D S R
  • 专利权人:   GRAPHENEST SA, GRAPHENEST SA
  • 国际专利分类:   C01B031/00, C01B032/182, C01B032/184, C01B032/00, B01F013/10, B01F007/00, B01J019/00, C01B032/194, C01B032/225, C01G039/06, C07C067/08
  • 专利详细信息:   WO2017025926-A1 16 Feb 2017 C01B-031/00 201717 Pages: 21 English
  • 申请详细信息:   WO2017025926-A1 WOIB054848 11 Aug 2016
  • 优先权号:   PT108765, CA2995433

▎ 摘  要

NOVELTY - Producing graphene or graphene-like material, comprises: (a) providing particles of a crystalline graphitic material; (b) dispersing the particles of the crystalline graphitic material in a solvent mixture or surfactant mixture; (c) submitting the mixture to a cavitation force such that cavitation bubbles are present; and (d) submitting the mixture to high shear agitation of 2000-35000 rpm. USE - The method is useful for producing graphene or graphene-like material (claimed) including metal dichalcogenides, oxides and carbides, or two-dimensional or few-layer nano-materials. ADVANTAGE - The method: is cost-effective; provides graphene or graphene-like material with higher control of defects in the structure; does not utilize strong oxides or acids thus it is safe and environmental friendly; and utilizes combination of cavitation force and high shear agitation that improves production efficiency by reducing time-cycle, homogenizing mixture or lower range of particle size and avoid standing waves in liquid medium. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a device for production of graphene or graphene-like material, comprising a reactor having an enclosed vessel for receiving a solvent or surfactant mixture with dispersed particles of a crystalline graphitic material, the reactor is arranged for submitting the mixture in the enclosed vessel to a cavitation force so that cavitation bubbles are present and, simultaneously in the same enclosed vessel and submitting the mixture to high shear agitation of 2000-35000 rpm.