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    • 36. 发明申请
    • Production of chemically functionalized nano graphene materials
    • 生产化学官能化纳米石墨烯材料
    • US20110017587A1
    • 2011-01-27
    • US12460860
    • 2009-07-27
    • Aruna ZhamuBor Z. Jang
    • Aruna ZhamuBor Z. Jang
    • B01J19/10
    • C01B31/0469B01J19/10B82Y30/00B82Y40/00C01B32/19C01B32/194C01B32/225
    • Provided in this invention is a process for producing chemically functionalized nano graphene materials, known as nano graphene platelets (NGPs), graphene nano sheets, or graphene nano ribbons. Subsequently, a polymer can be grafted to a functional group of the resulting functionalized NGPs. In one preferred embodiment, the process comprises (A) dispersing a pristine graphite material and an azide or bi-radical compound in a liquid medium comprising to form a suspension; and (B) subjecting the suspension to direct ultrasonication with to ultrasonic waves of a desired intensity or power level for a length of time sufficient to produce nano graphene platelets and to enable a chemical reaction to occur between the nano graphene platelets and the azide or bi-radical compound to produce the functionalized nano graphene material. Concurrent production and functionalization of NGPs directly from pristine graphitic materials can be achieved in one step and in the same reactor.
    • 在本发明中提供了一种生产化学官能化的纳米石墨烯材料的方法,称为纳米石墨烯片(NGP),石墨烯纳米片或石墨烯纳米带。 随后,可以将聚合物接枝到得到的官能化NGP的官能团上。 在一个优选实施方案中,该方法包括(A)将原始石墨材料和叠氮化物或双自由基化合物分散在包含形成悬浮液的液体介质中; 和(B)使悬浮液对所需强度或功率水平的超声波进行超声波处理足够长的时间以产生纳米石墨烯血小板,并使纳米石墨烯血小板和叠氮化物或二氧化钛之间发生化学反应 以制备功能化的纳米石墨烯材料。 直接来自原始石墨材料的NGP的并行生产和功能化可以在一个步骤和同一个反应器中实现。
    • 38. 发明申请
    • ELECTROCHEMICAL PRODUCTION OF GRAPHENE SHEETS DIRECTLY FROM GRAPHITE MINERAL
    • 从石墨矿物直接电化学生产石墨板材
    • WO2017155665A1
    • 2017-09-14
    • PCT/US2017/017458
    • 2017-02-10
    • ZHAMU, ArunaJANG, Bor Z.ANGSTRON MATERIALS, INC.
    • ZHAMU, ArunaJANG, Bor Z.
    • B82Y30/00C01B31/04C25B1/00
    • C01B31/0469C01B32/19C01B2204/02C01B2204/04C25B1/00C25B9/16
    • A method of producing graphene sheets directly from graphite, comprising: (a) forming an intercalated graphite compound by an electrochemical intercalation procedure conducted in an intercalation reactor, containing (i) a liquid solution electrolyte comprising an intercalating agent and a graphene plane-wetting agent dissolved therein; (ii) a working electrode that contains the graphite material powder as an active material; and (iii) a counter-electrode, and wherein a current is imposed upon the working electrode and counter electrode at a current density sufficient for effecting electrochemical intercalation of the intercalating agent and/or wetting agent into interlayer spacing, wherein the wetting agent is selected from melamine, ammonium sulfate, sodium dodecyl sulfate, Na(ethylenediamine), tetraalkyammonium, ammonia, carbamide, hexamethylenetetramine, organic amine, poly(sodium-4-styrene sulfonate), or a combination thereof; and (b) exfoliating and separating the intercalated graphite compound using ultrasonication, thermal shock exposure, and/or a mechanical shearing treatment to produce graphene sheets.
    • 一种直接由石墨生产石墨烯片的方法,其包括:(a)通过在插层反应器中进行的电化学插层程序形成插层石墨化合物,所述插层反应器包含(i)液体溶液电解质,其包含嵌入 试剂和溶解在其中的石墨烯平面润湿剂; (ii)包含石墨材料粉末作为活性材料的工作电极; 和(iii)反电极,并且其中电流以足以实现嵌入剂和/或润湿剂电化学嵌入到层间间隔中的电流密度施加在工作电极和反电极上,其中选择润湿剂 三聚氰胺,硫酸铵,十二烷基硫酸钠,Na(乙二胺),四烷基铵,氨,脲,六亚甲基四胺,有机胺,聚(4-苯乙烯磺酸钠)或其组合; 和(b)使用超声波,热冲击暴露和/或机械剪切处理来剥离和分离插层石墨化合物以生产石墨烯片。