Regioselective modification of a xyloglucan hemicellulose for high-performance biopolymer barrier films
2013 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 93, no 2, 466-472 p.Article in journal (Refereed) Published
Biobased polymers such as starch and hemicelluloses from wood are of interest for packaging applications, but suffer from limitations in performance under moist conditions. Xyloglucan from industrial tamarind seed waste offers potential, but its Tg is too high for thermal processing applications. Regioselective modification is therefore performed using an approach involving periodate oxidation followed by reduction. The resulting polymer structures are characterized using MALDI-TOF-MS, size-exclusion chromatography, FTIR and carbohydrate analysis. Films are cast from water and characterized by thermo-gravimetry, dynamic mechanical thermal analysis, dynamic water vapor sorption, oxygen transmission and tensile tests. Property changes are interpreted from structural changes. These new polymers show much superior performance to current petroleum-based polymers in industrial use. Furthermore, this regioselective modification can be carefully controlled, and results in a new type of cellulose derivatives with preserved cellulose backbone without the need for harmful solvents.
Place, publisher, year, edition, pages
2013. Vol. 93, no 2, 466-472 p.
Xyloglucan, Oxygen barrier, Packaging, Periodate oxidation, Cellulose derivatives
IdentifiersURN: urn:nbn:se:kth:diva-107057DOI: 10.1016/j.carbpol.2012.12.041ISI: 000317148200015ScopusID: 2-s2.0-84874167776OAI: oai:DiVA.org:kth-107057DiVA: diva2:574573
QC 20130514. Updated from accepted to published.2012-12-062012-12-062013-05-14Bibliographically approved