Synthesis of Polyvinylpyrrolidone (PVP)-Green Tea Extract Composite Nanostructures using Electrohydrodynamic Spraying Technique (Peer Reviewer 2)

Kamaruddin, Kamaruddin and Edikresnha, Dhewa and Sriyanti, Ida and Munir, Muhammad Miftahul and Khairurrijal, Khairurrijal (2017) Synthesis of Polyvinylpyrrolidone (PVP)-Green Tea Extract Composite Nanostructures using Electrohydrodynamic Spraying Technique (Peer Reviewer 2). IOP Publishing Ltd., United Kingdom.

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Abstract

Green Tea Extract (GTE) as an active substance has successfully loaded to PVP nanostructures using electrohydrodynamic spraying technique. The precursor solution was the mixture of ethanolic polyvinylpyrrolidone (PVP) with a molecular weight of 1,300 kg/mol and ethanolic GTE solutions at a weight concentration of 4 wt.% and 2 wt.%, respectively, and it was estimated that the entanglement number was 2. The electrospraying was conducted at the voltage of 15 kV, the flow rate of 10 µL/min., and the distance between the collector and the tip of the nozzle of 10 cm. The SEM images showed that the PVP/GTE nanostructures had a combination of agglomerated beads (less spherical particles) and nanofibers. This occurred because if the PVP concentration is low, the PVP/GTE composite has weak core structures that cause the shell to be easily agglomerated each other. The intermolecular interaction between PVP and GTE in the PVP/GTE nanostructures occurred as confirmed by the peak at 3396 cm-1, which is the carboxyl group, proving that the PVP/GTE nanostructures contained water, alcohols, and phenols. The peak at 1040 cm-1, which is the stretching of C-O group in amino acid, gave another proof to the intermolecular interaction

Item Type: Other
Subjects: L Education > L Education (General) > L7-991 Education (General)
Q Science > QC Physics > QC1-999 Physics
Divisions: 06-Faculty of Education and Educational Science > 84103-Physics Education (S2)
Depositing User: Dr Ida Sriyanti, M.Si
Date Deposited: 15 Feb 2021 06:20
Last Modified: 15 Feb 2021 06:20
URI: http://repository.unsri.ac.id/id/eprint/40158

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