Home » Volume 30, 2015 » Issue No. 1
Cellulose thin films from ionic liquid solutions
Rupert Kargl, Tamilselvan Mohan, Volker Ribitsch, Bodo Saake, Juergen Puls and Karin Stana Kleinschek
The solution properties of cellulose, dissolved in the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIMAc), were analysed using rheology and turbidity measurements. The influence of dimethyl-sulfoxide addition and temperature change on the viscosity of these solutions was studied in detail. Subsequently, crystallinity measurements of precipitated powders from EMIMAc solutions were conducted. Additionally, the stability of cellulose during storage in the ionic liquid solution was proven by molecular weight analysis. Thin films of cellulose were prepared by spin coating from EMIMAc/DMSO mixtures and subsequent precipitation on silicon wafers and quartz crystal microbalance gold coated sensors. Atomic force microscopy and profilometry gave insights into the morphology and thickness of the prepared films and their possible application in the study of surface properties of cellulose.
Atomic force microscopy (AFM), Crystallinity, Ionic liquid, Spin coating, Thin polymer films
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Cellulose thin films from ionic liquid solutions (2015-30-01-p006-013-Kargl.pdf)
Nordic Pulp & Paper Research Journal (NPPRJ) is an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents, pulp and paper and including new fiber-based materials, recovery and by-products from pulping processes, bio-refining and energy issues. Articles meeting required scientific standards are accepted from any continent.
ISSN: 0283-2631