▎ 摘　　要

Ni-Al layered double hydroxide/graphene hybrid fillers were prepared via co-precipitation method. The structural and thermal studies of these fillers were conducted using X-ray diffractometer (XRD) and thermogravimetric analyzer (TGA). Subsequently, by using solution casting method, these fillers were introduced into the polyvinyl alcohol (PVA)/starch matrix as reinforcing agent. For the composites, characteristic peaks of Ni-Al-LDH/graphene disappeared irrespective of filler content. TGA showed an increase in the initial degradation temperature (234-242 degrees C) when filler content was increased from 0 to 2 wt%. Differential scanning calorimeter (DSC) analysis exhibited an increase in heat of fusion (Delta H-m), melting temperature (T-m) and percentage crystallinity values for the PVA/ starch matrix having 1 wt% of filler. Similar trend was observed for tensile strength and Young's modulus of composites. Scanning electron microscopy (SEM) showed a homogeneous distribution of filler throughout the matrix.