Pusporini, Pusporini and Edikresnha, Dhewa and Sriyanti, Ida and Suciati, Tri and Munir, Muhammad Miftahul and Khairurrijal, Khairurrijal (2020) Electrospun polyvinylpyrrolidone (PVP)/green tea extract composite nanofiber mats and their antioxidant activities (Peer Review). Universitas Negeri Padang. (Unpublished)
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Abstract
Electrospinning was employed to make PVP (polyvinylpyrrolidone)/GTE (green tea extract) composite nanofiber mats. The electrospun PVP nanofiber mat as well as the PVP/GTE nanofiber mats were uniform. The average fiber diameter of PVP/GTE composite nanofiber mat decreased with increasing the GTE weight fraction (or decreasing the PVP weight fraction) in the PVP/GTE solution because the PVP/GTE solution concentration decreased. Then, the broad FTIR peak representing the stretching vibrations of O–H in hydroxyl groups of phenols and the stretching of N–H in amine groups of the GTE paste shifted to higher wavenumbers in the PVP/GTE composite nanofiber mats. These peak shifts implied that PVP and catechins of GTE in the PVP/GTE composite nanofiber mats had intermolecular interactions via hydrogen bonds between carbonyl groups of PVP and hydroxyl groups of catechins in GTE. Lastly, the antioxidant activity of the PVP/GTE composite nanofiber mat increased with reducing the average fiber diameter because the amount of catechins in the composite nanofiber mat increased with the increase of surface area due to the reduction of the average fiber diameter
| Item Type: | Other |
|---|---|
| Subjects: | L Education > L Education (General) > L7-991 Education (General) Q Science > QC Physics > QC1-999 Physics R Medicine > RS Pharmacy and materia medica > RS1-441 Pharmacy and materia medica |
| Divisions: | 06-Faculty of Education and Educational Science > 84103-Physics Education (S2) |
| Depositing User: | Dr Ida Sriyanti, M.Si |
| Date Deposited: | 21 Mar 2021 14:40 |
| Last Modified: | 21 Mar 2021 14:40 |
| URI: | http://repository.unsri.ac.id/id/eprint/43999 |
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