Modification of carbon nanotubes material (CNTs) for graphene oxide nanoribbons and its application in reducing friction for lube oil
Abstract
In this study, multi-walled carbon nanotubes (MWCNTs) were modified by oxidation using a improved Hummers method in the presence of KNO3 for graphene oxide nanoribbons (GONRs) synthesis. The result showed that the highest oxidation efficiency of MWCNTs was achieved under following optimal conditions: KNO3 5 g/g CNTs, H2SO4 25 ml/0.1 g CNTs, KMnO4 3 g/g CNTs. Interestingly, the synthesized graphene oxide nanoribbons material by unzipping and thermal exfoliation of MWCNTs had a significant improvement on antiwear property of Group II base oil.
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