Cellulose thin films from ionic liquid solutions

Rupert Kargl, Tamilselvan Mohan, Volker Ribitsch, Bodo Saake, Juergen Puls, Karin Stana-Kleinschek

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)6-13
Number of pages8
JournalNordic Pulp and Paper Research Journal
Volume30
Issue number1
Publication statusPublished - 1 Jan 2015
Externally publishedYes

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Keywords

  • Atomic force microscopy
  • Crystallinity
  • Ionic liquid
  • Spin coating
  • Thin polymer films

ASJC Scopus subject areas

  • Forestry
  • Materials Science(all)

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