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Abstract
Plasticizers are widely used to improve the elasticity of regenerated cellulose films, but academic research has thus far ignored the possibility of plasticizer blending. We studied the effects of glycerol, sorbitol, and maltitol on film properties based on a systematic design for mixture experiments and determined regression models to correlate blend composition with film properties. Our results showed that plasticizer blending enabled us to control film tensile strength and water vapour and oxygen permeabilities, which are key indicators to evaluate film efficacy in barrier packaging applications. Our films showed lower water vapor and oxygen permeabilities than commercial uncoated cellophane film and could potentially provide a renewable alternative to conventional polyolefin films with further improvements. These results are important and they indicate that plasticizer blending provides a novel and simple methodology to improve regenerated cellulose films to meet the increasing demand for alternatives to conventional plastics in packaging and other applications.
Supplementary materials
Title
Manuscript appendix
Description
The appendix includes experimental data on the prepared regenerated cellulose films based on a systematic experimental design linking plasticizer blend composition with determined film properties.
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