Effect of citric acid, sodium potassium tartrate or calcium chloride addition on different properties of hydroxypropyl cellulose films

Effect of, citric acid, sodium potassium tartrate or calcium chloride addition on water vapour permeability, oxygen transmission rate, and mechanical properties of hydroxypropyl cellulose films at different relative humidities were studied. Water vapor permeability, oxygen transmission rate, and mechanical properties of hydroxyethyl cellulose films were determined. Analysis of film surfaces and thermal properties of the films were also performed. Hydroxypropyl cellulose films containing 15% citric acid resulted in smaller water vapor permeability and oxygen transmission rate in comparison with hydroxypropyl cellulose films at the three relative humidities. The films containing citric acid were more flexible than that of the films containing calcium chloride or sodium potassium tartrate.