LAUSR

The starch nanoparticles from water chestnut (WS), lotus stem (LS) and horse chestnut (HS) starch was synthesized using planetary ball milling. The starch nanoparticles were investigated by using various techniques like particle size analyser, differential scanning colorimeter (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), rheometer, and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). The particle size of horse chestnut starch nanoparticles (HNS), water chestnut starch nanoparticles (WNS) and lotus stem starch nanoparticles (LNS) was found to be 343,271 & 855 nm with zeta potential of -18.75, -20.45 & -12.2 mV, respectively. SEM revealed small and damaged starch granules. The relative crystallinity was decreased from 13.13 to 6.22, 22.27 to 7.96 and 26.16 to 7.98% in HS, LS and WS starch after ball milling and average crystallite size of starch nanoparticles was found to be 9-12 nm. The starch nanoparticles showed increase in transition temperature and viscosity and the decrease in shear thinning behaviour as analysed by DSC and rheometer. These properties could be useful in particular food and drug formulations.