Improved stabilisation of graphite nanoflake dispersions using hydrothermally-produced nanocellulose

Dispersing graphite nanpoflakes in aqueous suspension is essential both during their processing and to realise the high level of functionality they offer. In this study two types chemical-free nanocelluloses were assessed as possible dispersing agent for nanoflakes. Hydrothermally-produced nanocellulose (HTC) obtained by supercritical water treatment microcrystalline cellulose, showed superior than more conventional, mechanically-produced microfibrillated (MFC) alternative, effectively preventing nanoflake agglomeration. Thanks specific method, HTC material displayed higher total surface energy a favourable particle morphology. These properties resulted 2-fold reduction volume median colloidal size nanographite upon addition only 2 w/w% nanocellulose. The improved single dispersion within matrix could be observed microscopically was reflected rheologically. latter achieved parameterising stress-shear rate response fitting linear segments displaying coupling response. Using dispersant medium positive step toward exfoliation into graphene affordable environmentally-friendly way.