• 专利标题:   Synthesizing graphene felts, comprises e.g. segregating graphene raw material, optimizing weight of segregated graphene raw material, functionalizing graphene raw material, and deagglomerating graphene raw material.
  • 专利号:   WO2020100168-A1
  • 发明人:   VIVEK SINGHAL A, KUMAR SHARMA A, PAUL K, BHARDWAJ A, SHAJAR ALI IMAM S, CHARAYA H
  • 专利权人:   LOG 9 MATERIALS SCI PRIVATE LTD
  • 国际专利分类:   C01B032/186
  • 专利详细信息:   WO2020100168-A1 22 May 2020 C01B-032/186 202047 Pages: 29 English
  • 申请详细信息:   WO2020100168-A1 WOIN050848 15 Nov 2019
  • 优先权号:   IN11043051

▎ 摘  要

NOVELTY - Synthesizing graphene felts, comprises: segregating a predetermined amount of graphene raw material; optimizing a weight of the segregated graphene raw material; functionalizing the graphene raw material used as a precursor material; deagglomerating graphene raw material for achieving a uniform size distribution and a uniform material density of graphene raw material; pouring the deagglomerated graphene material in a pre-designed mold for mechanical compaction, where the mold comprises positive mold and negative mold; treating the graphene felts with chemical agents for enhancing a surface characteristic for pre-set time period, where the pre-set time period is 2-3 hours; and washing the graphene felts after the pre-set time period with distilled water to introduce functional group elements (oxygen) on the surface of graphene felts. USE - The method is useful for synthesizing graphene felts. ADVANTAGE - The method: provides binder-free graphene felts that are free standing and mechanically robust; utilizes deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate molding technique that allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application; and provides graphene felts that is obtained from process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties as compared to conventional graphene felts while not compromising with their mechanical properties. DETAILED DESCRIPTION - Synthesizing graphene felts, comprises: segregating a predetermined amount of graphene raw material, where the graphene raw material is segregated by a process comprising carding, mechanical delumping, sonication, shearing and sieve shaking processes; optimizing a weight of the segregated graphene raw material; functionalizing the graphene raw material used as a precursor material, where the functioanlized graphene raw material is processed to provide nano or microfibrous structure to graphene raw material, and the processed nano or micro structure of graphene raw material entangle to form graphene felt during compaction processes, and the graphene materials without nano and micro fibrous structures are processed through electrospinning and chemical or physical crosslinking processes to prepare fibers with nano and microstructures for producing graphene felts; deagglomerating graphene raw material for achieving a uniform size distribution and a uniform material density of graphene raw material; pouring the deagglomerated graphene material in a pre-designed mold for mechanical compaction, where the mold comprises positive mold and negative mold; treating the graphene felts with chemical agents for enhancing a surface characteristic for pre-set time period, where the pre-set time period is 2-3 hours; and washing the graphene felts after the pre-set time period with distilled water to introduce functional group elements (oxygen) on the surface of graphene felts, where the functional groups is introduced on the surface of graphene felts to make the graphene felts hydrophilic, and the graphene felts are analyzed for porosity, thickness, surface area and density.