What You Need to Know
Film formation relies on thermally induced gelatinization of polysaccharides (potato starch, laminarin) or solvent‑casting of biopolymers (PLA) followed by controlled drying. Chitosan films gain mechanical strength through glycerol‑mediated plasticization and heat‑induced cross‑linking. Mechanical properties and moisture content are governed by temperature, humidity, drying time, and plasticizer concentration.
Steps
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The Science
Primary Reaction
Thermal gelatinization and polymer cross‑linking (hydrogen‑bond network formation)