Table 2.

Comparative summary of key FTIR absorption bands for individual components and the composite nanofiber

Material	Key Peaks (cm⁻¹)	Functional Groups
PVA	3280–3300, 2910, 1140, 840	O–H, C–H, C–O–C, C–C
Gelatin	3300–3400, 1640, 1540, 1240	Amide A, I, II, III
Chitosan	3350, 1650, 1560, 1020–1150	O–H/N–H, Amide I/II, C–O stretching
(AmB)	3400, 1700, 1450–1600, 1100–1200	O–H, C = O, C = C, C–O
AmB-loaded nanofiber	3300, 1650, 1540, 1140	Overlapping bands, hydrogen bonding