i am making biodegradable films pratein and pva with reinfoe=rcing material the problem is that when i dry them after drying they shrink and form wrinkles at the sides how to avoid them
Are you making the film at room temperature? The solvent may be evaporating very fast. Try to produce it at different temperatures under vacuum and with other solvents.
You're welcome. In this case try using another solvent in the synthesis or different drying temperatures. Do you thing that the addition of protein might cause the wrinkles at this temperature?