Synthesis dielectric and mechanical properties of paddy straw derived graphene quantum dots-stone waste nanocomposite

In present work, graphene quantum dots (GQDs) was synthesized from paddy straw using the cost effective hydrothermal method. High strength and moisture resistant GQDs reinforced stone waste particulates nanocomposites were prepared for the first time. Structural, morphological and functional group were analyzed using X-Ray diffraction, SEM and FT-IR techniques, respectively. Interestingly, GQDs-stone nanocomposites exhibited low dielectric constant (epsilon ' - 10) as compared to pristine stone composites (epsilon ' - 55). High flexural strength up to 60 MPa was achieved from GQDs reinforcement in stone waste nanocomposites. The high flexural strength and low dielectric constant from GQDs-stone waste polymer composite sheet were attributed due to high mechanical strength and sp2 hybridized covalent bond of GQDs and its high conductivity.

Automated summary

In this study, graphene quantum dots (GQDs) were synthesized from paddy straw using a cost-effective hydrothermal method. High strength and moisture resistant GQDs reinforced stone waste nanocomposites were prepared for the first time, showing low dielectric constant and high flexural strength attributes to the mechanical strength and high conductivity of GQDs.