Rheological properties of cellulose/ionic liquid solutions: from dilute to concentrated states.
作者： Martin Gericke , Kerstin Schlufter , Tim Liebert , Thomas Heinze , Tatiana Budtova
DOI: 10.1021/BM801430X
关键词:
摘要: Steady state shear flow of different types cellulose (microcrystalline, spruce sulfite and bacterial) dissolved in 1-ethyl-3-methylimidazolium acetate was studied a large range concentrations (0−15%) temperatures (0−100 °C). Newtonian recorded for all experimental conditions; these viscosity values were used detailed viscosity−concentration viscosity−temperature analysis. The exponent the power law found to be around 4 from 0 40 °C, which is comparable with other solvents, 2.5−3 60−100 °C. Intrinsic viscosities celluloses decreased temperature, indicating drop solvent thermodynamic quality heating. data obtained can reduced master plot versus (concentration × intrinsic viscosity) whole temperature range. Mark−Houwink exponents determined: they lower than that LiCl/N,N-dime...
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