Kamaruddin, Kamaruddin and Edikresnha, Dhewa and Sriyanti, Ida and Munir, Muhammad Miftahul and Khairurrijal, Khairurrijal (2020) Synthesis of Polyvinylpyrrolidone (PVP)-Green Tea Extract Composite Nanostructures using Electrohydrodynamic Spraying Technique (Peer Review). Universitas Negeri Padang. (Unpublished)
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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: | 22 Mar 2021 04:03 |
| Last Modified: | 22 Mar 2021 04:03 |
| URI: | http://repository.unsri.ac.id/id/eprint/44018 |
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