Journal
CARBOHYDRATE POLYMERS
Volume 151, Issue -, Pages 988-995Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.06.048
Keywords
Long chain cellulose ester; Cellulose film; Barrier properties; Mechanical properties
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Nowadays one of the growing trends is to replace oil-based products with cellulose-based materials. Currently most cellulose esters require a huge excess of chemicals and have therefore, not been broadly used in the industry. Here, we show that decreasing the molar mass of cellulose by ozone hydrolysis provides cellulose functionalization with less chemical consumption. To reveal the differences in reactivity and chemical consumption, we showed esterification of both native cellulose and ozone treated hydrolyzed cellulose. Based on the results, the molar mass of the starting cellulose has a significant effect on the end product's degree of substitution and properties. Furthermore, molar mass controlled palmitate esters form mechanically strong, flexible and optically transparent films with excellent water barrier properties. We anticipate that molar mass controlled cellulose will provide a starting point for the greater use of cellulose based materials, in various application, such as films and composites. (C) 2016 Elsevier Ltd. All rights reserved.
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