Mechanical properties of films made from dialcohol cellulose prepared by homogeneous periodate oxidation
2014 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 21, no 1, 769-776 p.Article in journal (Refereed) Published
2,3-Dialdehyde celluloses were prepared by homogeneous periodate oxidation in an aqueous solution of methylol cellulose. Since methylol cellulose stays dissolved in water for a certain time before decomposing gradually into regenerated cellulose, the oxidation reaction progressed homogeneously throughout the period. The resulting dialdehyde cellulose achieved an oxidation level of over 90 % in as little as 12 h. Reducing the dialdehyde celluloses with NaBH4 resulted in water-soluble dialcohol celluloses, which have an open-ring structure at the C2-C3 position. The dialcohol celluloses were characterized using nuclear magnetic resonance spectrometry, Fourier transform infrared spectroscopy, and differential scanning calorimetry. The T-g of the products decreased with increasing oxidation levels. The products might be processable, and unique tensile properties were obtained by cutting the C2-C3 bonds in the glucopyranose rings. The dialcohol celluloses prepared using a cast method yielded clear and transparent films which showed unique mechanical properties by tensile tests depending on the values of oxidation level.
Place, publisher, year, edition, pages
2014. Vol. 21, no 1, 769-776 p.
Cellulose, Dialcohol cellulose, Dialdehyde cellulose, Dissolving pulp, Methylol cellulose, Periodate oxidation
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-142497DOI: 10.1007/s10570-013-0153-7ISI: 000330807000062ScopusID: 2-s2.0-84893675591OAI: oai:DiVA.org:kth-142497DiVA: diva2:703271
QC 201403062014-03-062014-03-062014-03-06Bibliographically approved