▎ 摘　　要

NOVELTY - Preparing graphene oxide/nano silicon dioxide composite demulsifier involves forming graphene oxide with hydroxyl and carboxyl groups on the surface. The nano-silicon dioxide generated by the hydrolysis of tetraethyl orthosilicate is grafted onto surface of the graphene oxide in situ to obtain a graphene oxide/nano-silicon dioxide composite demulsifier. USE - Method for preparing graphene oxide/nano silicon dioxide composite demulsifier for W/O emulsion and O/W emulsion (claimed). ADVANTAGE - The method enables to prepare graphene oxide/nano silicon dioxide composite demulsifier that has fast speed, and good demulsification effect.