TY - JOUR
T1 - Ultraviolet Radiation Driven Multifunctional Polyvinyl Alcohol Based Hybrid Polymer Nanocomposites
AU - Kavitha, C. M.
AU - Eshwarappa, K. M.
AU - Shetty, Shivakumar Jagadish
AU - Gurumurthy, S. C.
AU - Mallikarjuna, I.
N1 - Publisher Copyright:
© 2024 The Author(s). Journal of Applied Polymer Science published by Wiley Periodicals LLC.
PY - 2024
Y1 - 2024
N2 - Herein we report the tailoring of the band gap of polyvinyl alcohol (PVA)/graphene oxide (GO), PVA-Ag (silver), PVA/GO-Ag, and PVA/GO/Ag/GA (glutaraldehyde) employing ultraviolet (UV) irradiation. Nanocomposites were fabricated by the in situ solution casting method. Among fabricated, PVA/GO/Ag/GA was identified as the nanocomposite having enhanced properties. The structural and chemical studies confirm enhanced interfacial interaction and crosslinking between PVA and GO in the presence of GA. GA crosslinked PVA/GO-Ag nanocomposite shows a reduction in band gap and enhanced dc conductivity compared to other composites. Post-UV irradiation studies show PVA/GO/Ag/GA exhibits mechanical stability and good conductivity. The band gap of PVA/GO/Ag/GA decreased from 5.27 eV (unirradiated) to 2.66 eV for 24 h of UV exposure. As the exposure time increased to 48 h, the band gap increased to 5.16 eV and finally band gap decreased to 4.47 eV for 72 h of UV exposure. This reveals that though there is no linear variation in the energy gap with UV exposure time but accurate reproducibility was observed. This brings about the possibility of tailoring the band gap of PVA/GO/Ag/GA with better electrical conductivity (3.4 × 10−9 Sm−1) and good mechanical stability which is very crucial for optoelectronic applications. Additionally, for 72 h of UV radiation exposure, the PVA/GO/Ag/GA composite demonstrates UV transmittance of 3.3%, underscoring its UV shielding capability.
AB - Herein we report the tailoring of the band gap of polyvinyl alcohol (PVA)/graphene oxide (GO), PVA-Ag (silver), PVA/GO-Ag, and PVA/GO/Ag/GA (glutaraldehyde) employing ultraviolet (UV) irradiation. Nanocomposites were fabricated by the in situ solution casting method. Among fabricated, PVA/GO/Ag/GA was identified as the nanocomposite having enhanced properties. The structural and chemical studies confirm enhanced interfacial interaction and crosslinking between PVA and GO in the presence of GA. GA crosslinked PVA/GO-Ag nanocomposite shows a reduction in band gap and enhanced dc conductivity compared to other composites. Post-UV irradiation studies show PVA/GO/Ag/GA exhibits mechanical stability and good conductivity. The band gap of PVA/GO/Ag/GA decreased from 5.27 eV (unirradiated) to 2.66 eV for 24 h of UV exposure. As the exposure time increased to 48 h, the band gap increased to 5.16 eV and finally band gap decreased to 4.47 eV for 72 h of UV exposure. This reveals that though there is no linear variation in the energy gap with UV exposure time but accurate reproducibility was observed. This brings about the possibility of tailoring the band gap of PVA/GO/Ag/GA with better electrical conductivity (3.4 × 10−9 Sm−1) and good mechanical stability which is very crucial for optoelectronic applications. Additionally, for 72 h of UV radiation exposure, the PVA/GO/Ag/GA composite demonstrates UV transmittance of 3.3%, underscoring its UV shielding capability.
UR - https://www.scopus.com/pages/publications/85210171647
UR - https://www.scopus.com/pages/publications/85210171647#tab=citedBy
U2 - 10.1002/app.56529
DO - 10.1002/app.56529
M3 - Article
AN - SCOPUS:85210171647
SN - 0021-8995
VL - 142
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 9
M1 - e56529
ER -