Chemical Moification of Graphene Oxide

Chemical moification of graphene oxide Yoshiaki Matsuo Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji Hyogo, 671-2201, Japan ymatsuo@eng.u-hyogo.ac.jp Graphene oxide ( withal called graphite oxide or graphitic acerb, abbreviated as GO) which was first synthesized in the 19th ascorbic acid is one of the covalent type of graphite embolism compounds. of tardy it has attracted much attention as a precursor of graphene, because it is slow exfoliated into individual sheets in an aqueous solution. The structure of GO has not been richy solved yet, however, it possesses acid-forming hydroxyl, epoxy and carbonyl groups. Among these working(a) groups, the acidic hydroxyl groups be usually used for march on chemical modification of GO and various novel intercalation compounds of GO have been synthesized. When alkyl radical groups are connected to the horizontal surfaces of GO, the resulting materials are hydrophobic and are well exfoliated in complete solvents. In this paper, synthesis, properties and reactions of chemically modified GO are summarized. grooming and properties of of hydrophobized GO The addition of the aqueous solution of cationic surfactants much(prenominal) as alkyltrimethylammonium ions to the GO dispersion readily provides the precipitation of surfactant-intercalated GO. The orientation course of alkyl groups surrounded by the layers of GO varies depending on the content of surfactant. As the add-on of the content it changes form monolayer, bilayer, interdigitated monlayer and paraffin type bilayer. An case of hexadecyltrimethylammonium ionintercalated GO is shown, ogether with the bilayer type orientation of alkyl chains between the layers of GO. GO layer N N N N N Alkylamines with long alkyl chain lengths are also intercalated into GO simply by mixing them mechanically in the movement of a small amount of hexane. Starting from N N N N N the alkylamine intercalated GO, silylated GO layer GO can be synth esized by the reaction GO with silylating re! agents in organic solvents....If you want to get a full essay, sanctify it on our website: BestEssayCheap.com

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