An Edible Film of Lipids and Cellulose Ethers: Barrier Properties to Moisture Vapor Transmission and Structural Evaluation

摘要

ABSTRACTAn edible, composite film of lipid and cellulose ethers was developed and appraised as a barrier to moisture vapor transmission. The film was comprised of a matrix of methylcellulose, hydroxypropyl meth‐ylcellulose and saturated C16and C18fatty acids, with a thin layer of white beeswax laminated to the surface. The edible film effectively retarded transport of moisture at water activities (aw) up to at least 0.97 and maintained good barrier properties even when the awon the low‐humidity side of the film was relatively high. The apparent activation energy for water vapor transmission through the edible film was 14.2 ± 2.5 kcal/mole. Electron microscopy revealed the importance of lipid morphology in determining moisture resistance lipid‐base