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

4th International Conference on Advanced Materials Science and Technology

Kamaruddin^1 ; Edikresnha, D.^1,2 ; Sriyanti, I.^1 ; Munir, M.M.^1,2 ; Khairurrijal^1,2

Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung

40132, Indonesia^1

Bioscience and Biotechnology Research Center, Institute for Research and Community Services, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung

40132, Indonesia^2

关键词: Active substance;    Composite nanostructures;    Green tea extracts;    Intermolecular interactions;    Poly vinyl pyrrolidone;    Precursor solutions;    Spherical particle;    Spraying techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012043/pdf
DOI  :  10.1088/1757-899X/202/1/012043

来源: IOP

【 摘 要 】

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 10L/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.