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000183571 0247_ $$2doi$$a10.1016/j.carbpol.2014.05.059
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000183571 1001_ $$0P:(DE-HGF)0$$aRein, Dmitry M.$$b0$$eCorresponding Author
000183571 245__ $$aTrue molecular solutions of natural cellulose in the binary ionic liquid-containing solvent mixtures
000183571 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2014
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000183571 520__ $$aEvidence is presented for the first time of true molecular dissolution of cellulose in binary mixtures of common polar organic solvents with ionic liquid. Cryogenic transmission electron microscopy, small-angle neutron-, X-ray- and static light scattering were used to investigate the structure of cellulose solutions in mixture of dimethyl formamide and 1-ethyl-3-methylimidazolium acetate. Structural information on the dissolved chains (average molecular weight ∼5 × 104 g/mol; gyration radius ∼36 nm, persistence length ∼4.5 nm), indicate the absence of significant aggregation of the dissolved chains and the calculated value of the second virial coefficient ∼2.45 × 10–2 mol ml/g2 indicates that this solvent system is a good solvent for cellulose. More facile dissolution of cellulose could be achieved in solvent mixtures that exhibit the highest electrical conductivity. Highly concentrated cellulose solution in pure ionic liquid (27 wt.%) prepared according to novel method, utilizing the rapid evaporation of a volatile co-solvent in binary solvent mixtures at superheated conditions, shows insignificant cellulose molecular aggregation.
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000183571 7001_ $$0P:(DE-HGF)0$$aKhalfin, Rafail$$b1
000183571 7001_ $$0P:(DE-Juel1)145431$$aSzekely, Noemi$$b2$$ufzj
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000183571 773__ $$0PERI:(DE-600)1501516-6$$a10.1016/j.carbpol.2014.05.059$$gVol. 112, p. 125 - 133$$p125 - 133$$tCarbohydrate polymers$$v112$$x0144-8617$$y2014
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