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Rheology of Concentrated Cellulose Solutions in 1-Butyl-3-methylimidazolium Chloride

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Abstract

Rheological behavior of the concentrated cellulose/1-butyl-3-methylimidazolium chloride ([BMIM]Cl) solutions was investigated. As polymeric fluid, solutions of cellulose in [BMIM]Cl display a marked elastic behavior under shear flow. The dependence of the shear viscosity η, and of the dynamic modulus, on concentration, average degree of polymerization (DP) and temperature is discussed. At lower concentrations and degrees of polymerization (DP), cellulose solutions show viscous, inelastic behavior at low frequencies and low shear rate. At higher concentration and DP, cellulose solutions are more elastic at higher frequencies and shear rate. Such solutions also have some usual rheological properties. The dynamic rheological responses revealed that the Cox–Merz rule did not hold for these cellulose solutions at high deformation rate. Plotting storage modulus G′ against loss modulus G″ gave almost a master curve which is independent of temperature and concentration, with the slope of about 1.651 for 10 wt% cellulose solutions. This value indicates the existence of microheterogeneity in the solution system.

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Acknowledgements

The work is supported by a grant from the Ministry of Education of the People’s Republic of China (Grant No. 707026), Science and Technology Commission of Shanghai Municipality (Grant No. 08XD14005) and Shanghai Leading Academic Discipline Project (Grant No. B603).

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, People’s Republic of China

    Xun Chen, Yumei Zhang, Lingyan Cheng & Huaping Wang

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  1. Xun Chen
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  2. Yumei Zhang
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  3. Lingyan Cheng
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  4. Huaping Wang
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Correspondence to Yumei Zhang.

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Chen, X., Zhang, Y., Cheng, L. et al. Rheology of Concentrated Cellulose Solutions in 1-Butyl-3-methylimidazolium Chloride. J Polym Environ 17, 273–279 (2009). https://doi.org/10.1007/s10924-009-0149-4

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  • DOI: https://doi.org/10.1007/s10924-009-0149-4

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