Dissolution state of cellulose in aqueous systems. 1. Alkaline solventsShow others and affiliations
2016 (English)In: Cellulose, ISSN 0969-0239, E-ISSN 1572-882X, Vol. 23, no 1, p. 247-258Article in journal (Refereed) Published
Resource type
Text
Abstract [en]
The understanding of the state of dissolution of cellulose in a certain solvent is a critical step forward in the development of new efficient solvent systems for cellulose. Nevertheless, obtaining such information is not trivial. Recently, polarization transfer solid-state NMR (PTssNMR) was shown to be a very promising technique regarding an efficient and robust characterization of the solution state of cellulose. In the present study, combining PTssNMR, microscopic techniques and X-ray diffraction, a set of alkaline aqueous systems are investigated. The addition of specific additives, such as urea or thiourea, to aqueous NaOH based systems as well as the use of an amphiphilic organic cation, is found to have pronounced effects on the dissolution efficiency of cellulose. Additionally, the characteristics of the regenerated material are strongly dependent on the dissolution system; typically less crystalline materials, presenting smoother morphologies, are obtained when amphiphilic solvents or additives are used.
Place, publisher, year, edition, pages
2016. Vol. 23, no 1, p. 247-258
Keywords [en]
Amphiphilicity, Chain packing, PTssNMR, NaOH, TBAH
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-27243DOI: 10.1007/s10570-015-0809-6ISI: 000368802700014Scopus ID: 2-s2.0-84955678486OAI: oai:DiVA.org:miun-27243DiVA, id: diva2:913462
2016-03-212016-03-172022-05-10Bibliographically approved