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Solution states of cellulose in selected direct dissolution agents

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Abstract

Properties of cellulose solutions in different direct dissolving liquids such as N-methylmorpholine-N-oxide and ionic liquids with varied cations and anions were investigated. The effects of different cations and anions of the used ionic liquids on the solution state were studied on the basis of the rheological characteristics of the resulting polymer solutions. The influence of these components is discussed in terms of zero shear viscosities, master curves with storage and loss moduli as well as complex viscosities using comparable molar ratios between cellulose and solvent and comparable polymer concentrations. Furthermore anisotropic properties of highly concentrated cellulose solutions were determined by means of polarised light microscopy and rheological methods subjected to the used solvent and variation of the polymer concentration as well as the temperature.

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Abbreviations

NMMO:

N-methylmorpholine-N-oxide monohydrate

BMIM-Cl:

1-n-butyl-3-methylimidazolium chloride

EMIM-Cl:

1-ethyl-3-methylimidazolium chloride

AMIM-Cl:

1-allyl-3-methylimidazolium chloride

BMIM-Br:

1-n-butyl-3-methylimidazolium bromide

EMIM-Br:

1-ethyl-3-methylimidazolium bromide

BMIM-SCN:

1-n-butyl-3-methylimidazolium thiocyanate

BMIM-Ac:

1-n-butyl-3-methylimidazolium acetate

EMIM-Ac:

1-ethyl-3-methylimidazolium acetate

EMIM-Prop:

1-ethyl-3-methylimidazolium propionate

EMIM-DEP:

1-ethyl-3-methylimidazolium diethylphosphate

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Acknowledgment

The authors gratefully acknowledge financial support of the German Federal Ministry of Economics and Technology (BMWA No. VF071002).

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Authors and Affiliations

  1. Thüringisches Institut für Textil- und Kunststoff-Forschung e.V., Breitscheidstr. 97, D-07407, Rudolstadt, Germany

    Birgit Kosan, Katrin Schwikal & Frank Meister

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  1. Birgit Kosan
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  2. Katrin Schwikal
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  3. Frank Meister
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Correspondence to Birgit Kosan.

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Kosan, B., Schwikal, K. & Meister, F. Solution states of cellulose in selected direct dissolution agents. Cellulose 17, 495–506 (2010). https://doi.org/10.1007/s10570-010-9402-1

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