Cellulose solutions in ionic liquids: using contrast matching to get solvent localization and form factor.
Cellulose a renewable and biodegradable polymer for traditional and innovative biomaterials, dissolved only in environmentally costly solvents until ionic liquids (ILs) were used. The form factor in solutions, a very interesting information, is not accessible at the lowest measurable concentrations, because chains, not flexible enough, overlap. SANS should make it accessible in mixtures of normal (H) and perdeuteriated (D) chains, of bacterial origin (BC), dissolved in mixtures of H and D ILs. We can use either extrapolation at zero D chains fraction at constant total chain (H +D) concentration with H chains contrast matched to solvent, or Zero Average Contrast (ZAC). Contrast may be influenced by IL localization on chains, an important issue in cellulose dissolution processes. We will check matching, and, if possible, measure at different D fractions and also use ZAC for two ILs: - BmimAcetate, for which acetate has been suggested to bind to the chains - BmimChloride, where Cl should bind less to BC. In case of matching difficulties, we will turn to solvent localization studies, using combinations of H or D-Bmim with H or D-Ac, increasing temperature to decrease interactions.
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The recommended format for citing this dataset in a research publication is in the following format:
François Boué; CUBITT Robert; DEME Bruno; JUDEINSTEIN Patrick; LIU Jiliang; MARTEL Anne; NISHIYAMA Yoshiharu; SCHWEINS Ralf and ZHANG Qiang. (2023). Cellulose solutions in ionic liquids: using contrast matching to get solvent localization and form factor.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-707
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