Abstract
In this report, synthesis of the starch nanoparticles from underutilized and cheap sources viz: Horse chestnut (HS), Water chestnut (WS) and Lotus stem (LS) by using mild alkali hydrolysis and ultra-sonication process has been presented. The particles were characterized by Differential scanning colorimeter (DSC), X-Ray Diffraction (XRD), Rheology, Scanning electron microscopy (SEM) and Fourier transform infra-spectroscopy (ATR-FTIR). The particle size measurements, functional properties and antioxidant potential of starch nanoparticles were also analyzed. The experimental results revealed that the average particle size diameter of Horse chestnut starch nanoparticles (HSP), Water chestnut starch nanoparticles (WSP) and Lotus stem starch nanoparticles (LSP) was found to be 420, 606 and 535 nm, respectively. We observed a notable increase in the water absorption capacity but decreased capacity for oil absorption in the starch nano-particles. SEM images revealed damaged starch granules after size reduction. Additionally, loss of crystallinity and molecular order was observed from XRD and ATR-FTIR spectra. It was concluded that the starch nanoparticles have better thermal stability, increased viscosity and antioxidant properties.
Highlights
In this report, synthesis of the starch nanoparticles from underutilized and cheap sources viz: Horse chestnut (HS), Water chestnut (WS) and Lotus stem (LS) by using mild alkali hydrolysis and ultrasonication process has been presented
The high zeta potential increases the electrostatic repulsions between the particles, which results in the decrease of Van der Waals forces of attraction
The Van der Waals forces are responsible for particle agglomeration that eventually leads to bigger particles[17]
Summary
Synthesis of the starch nanoparticles from underutilized and cheap sources viz: Horse chestnut (HS), Water chestnut (WS) and Lotus stem (LS) by using mild alkali hydrolysis and ultrasonication process has been presented. The average particle size diameter of HSP, LSP and WSP was found to be 420.33 ± 20.21, 606.31 ± 15.32 and 535.21 ± 18.54 nm, having poly dispersity index of 0.456 ± 0.12, 0.798 ± 0.07 and 0.37 ± 0.09 with zeta potential of −25.38 ± 3.13, −15.3 ± 2.12 and −41.29 ± 3.23 mV respectively.
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