Vanillin modified chitosan films were
prepared by solvent casting technique. The
composition of chitosan/vanillin is presented
in Table (1). Different concentration of (wt
%) chitosan prepared by dissolving in 1%
acetic acid with constant stirring overnight
and different concentration (wt %) of vanillin
solution prepared in double distilled water at
room temperature. Then different weight
ratios of vanillin solution (5, 15, 25, 35 wt %)
were mixed with chitosan solution and stirred till the solution becomes homogeneous,
subsequently highly viscous and bubble free
solutions were poured onto dry and cleaned
Petri dishes. The solvent was evaporated at
room temperature. Then films were dried at
45oC in an oven. After drying all films were
peeled off from Petri dishes and preserved in
vacuum desiccators.