Abstract
Self-assembly of hierarchical graphene oxide (GO)-based nanomaterials with novel functions has received a great deal of attentions. In this study, nanostructured organogels based on cationic amphiphile-GO composites were prepared. The gelation behaviors of amphiphile-GO composites in organic solvents can be regulated by changing the headgroups of amphiphiles. Ammonium substituted headgroup in molecular structures in present self-assembled composites is more favorable for the gelation in comparison to pyridinium headgroup. A possible mechanism for headgroup effects on self-assembly and as-prepared nanostructures is proposed. It is believed that the present amphiphile-GO self-assembled system will provide an alternative platform for the design of new GO nanomaterials and soft matters.
Highlights
Graphene, an atom thick graphite sheet, has received a great deal of attentions because of its unique electronic, thermal and mechanical properties etc. [1,2,3,4,5,6,7,8,9,10,11,12]
We have demonstrated the formation of nanostructured organogels based on self-assembly of cationic amphiphile-graphene oxide (GO) composites in common organic solvents
It seems that the ammonium substituted headgroup in molecular skeletons is more favorable for the gelation of organic solvents in comparison to pyridinium headgroup
Summary
An atom thick graphite sheet, has received a great deal of attentions because of its unique electronic, thermal and mechanical properties etc. [1,2,3,4,5,6,7,8,9,10,11,12]. Graphene oxide can be functionalized through both covalent and non-covalent bonding; thereby making graphene oxide an important building block for the synthesis of new materials [21,22,23,24,25] Since their reports by Zu et al [26] and Vickery et al [27] in 2009, polymer-GO hydrogels have attracted considerable attentions [28,29]. The Shi and his coworkers have recently developed self-assembled graphene hydrogels with 3D networks by a convenient one-step hydrothermal method or chemical reduction [35,36]. GO is merely incorporated into hydrogels disorderly and randomly in the above-mentioned cases
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