What You Need to Know
Polylactic acid films degrade via hydrolysis under composting conditions, while chitosan coatings form a semi‑permeable barrier that lowers oxygen and water vapor transmission. Cellulose nanofibrils reinforce paper matrices, reducing oxygen permeability by 70%, and phase‑change materials provide thermal regulation through latent heat absorption.
The Science
Primary Reaction
Hydrolytic degradation of PLA, formation of chitosan barrier, oxygen diffusion reduction, phase‑change heat absorption