Decisive role of electrostatic interaction in rheological evolution of graphene oxide under ultrasonic fragmentation.

ABSTRACT: The aqueous dispersibility and processability of graphene oxide (GO) are pivotal for various applications, including the fluid assembly of macroscopic materials and nanofluidic systems. Despite the widespread utilization of ultrasonic treatment to achieve homogeneous dispersions, the rheological changes of GO during sonication have remained relatively unexplored, leading to conflicting research findings. In this study, we demonstrate that the viscoelastic evolution of GO can significantly differ under ultrasonic fragmentation depending on the balance between repulsion force and attraction force at the initial state before fragmentation. When electrostatic repulsion is in delicate equilibrium with attractive forces, gelation occurs under ultrasonic fragmentation, leading to increased viscos

SUBMITTER: Hong D 

PROVIDER: S-EPMC11378021 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature