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Electrochemical method of producing nano graphene platelets
Electrochemical method of producing nano graphene platelets
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机译:电化学制备纳米石墨烯片的方法
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摘要
A method of producing nano-scaled graphene platelets with an average thickness smaller than 30 nm from a layered graphite material. The method comprises (a) forming a carboxylic acid-intercalated graphite compound by an electrochemical reaction; (b) exposing the intercalated graphite compound to a thermal shock to produce exfoliated graphite; and (c) subjecting the exfoliated graphite to a mechanical shearing treatment to produce the nano-scaled graphene platelets. Preferred carboxylic acids are formic acid and acetic acid. The exfoliation step in the instant invention does not involve the evolution of undesirable species, such as NOx and SOx, which are common by-products of exfoliating conventional sulfuric or nitric acid-intercalated graphite compounds. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.
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机译:一种由层状石墨材料生产平均厚度小于30 nm的纳米级石墨烯薄片的方法。该方法包括:(a)通过电化学反应形成羧酸插入的石墨化合物; (b)使插层石墨化合物经受热冲击以产生片状石墨; (c)对剥离的石墨进行机械剪切处理,以制备纳米级石墨烯薄片。优选的羧酸是甲酸和乙酸。本发明的剥落步骤不涉及不需要的物质如NO x Sub>和SO x Sub>的释放,它们是剥落常规硫酸或硝酸的常见副产物。酸插层石墨化合物。纳米级血小板是聚合物纳米复合材料的候选增强填料。纳米级石墨烯薄片是碳纳米管或碳纳米纤维的低成本替代品。
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