Impact of size control of graphene oxide nanosheets for enhancing electrical and mechanical properties of carbon nanotube–polymer composites

摘要: Graphene oxide (GO) has been explored for improving the dispersion stability of carbon nanotubes (CNTs). In particular, size and shape GO sheets have a significant impact on determining their efficiency optimizing properties CNT-based composites, but, to date, such effects never systematically assessed. this study, we evaluated GOs behavior multi-walled CNTs (MWCNTs), exploited them develop conducting film polymer–CNT composites with excellent electrical mechanical properties. Synthesis series five different varied sizes ranging from 170 2060 nm, but nearly same surface properties, allowed systematical investigation sheets. The CNT-dispersing ability was improved significantly as decreased. For example, critical GO-to-MWCNT ratio (WGO/WMWCNT) required produce stable MWCNT in proportion GO. Furthermore, minimum value WGO/WMWCNT fabricate conductive GO–MWCNT underwent dramatic decrease 0.1 0.025 changed nm. Small-sized facilitated formation an interconnected network more effectively than large-sized GOs. Further polymer–MWCNT performed by measuring Young's modulus composites. A two-fold enhancement achieved controlling Our results provide important guidelines design carbonaceous-material-based