The effect of hydrogen bond acceptor properties of ionic liquids on their cellulose solubility  

作　　者：STARK Annegret SELLIN Martin ONDRUSCHKA Bernd MASSONNE Klemens 

机构地区：[1]Institute of Chemical Technology, University of Leipzig, Linnéstr. 3-4, 04107 Leipzig, Germany [2]Thuringian Institute of Textile and Plastics Research, Breitscheidstr. 97, 07407 Rudolstadt-Schwarza, Germany [3]Institute for Technical Chemistry and Environmental Chemistry, Friedrich-Schiller-University, Lessingstr. 12, 07743 Jena, Germany [4]BASF SE, Chemical Research & Engineering, 67056 Ludwigshafen, Germany

出　　处：《Science China Chemistry》2012年第8期1663-1670,共8页中国科学（化学英文版）

基　　金：supported by the BASF SE. A.S. is indebted to the Deutsche Forschungsgemeinschaft (DFG) for funding within the SPP 1191 Priority Programme Ionic Liquids (STA1027/2-1 to /2-3)

摘　　要：It is nowadays well-known that ionic liquids can dissolve cellulose. However, little systematic data has been published that shed light onto the influence of the ionic liquid structure on the dissolution of cellulose. We have conducted 1H NMR spec- troscopy of ethanol in a large number of ionic liquids, and found an excellent correlation of the data obtained with the hydro- gen acceptor properties （B-values）. With this tool in hand, it is possible to distinguish between cellulose-dissolving and non-dissolving ionic liquids. A modulating effect of both, the anion of the non-dissolving ionic liquid and its cation was found in solubility studies with binary ionic liquid mixtures. The study was extended to other non-dissolving liquids, namely water and dimethylsulfoxide, and the effect of the cation was also investigated.It is nowadays well-known that ionic liquids can dissolve cellulose. However, little systematic data has been published that shed light onto the influence of the ionic liquid structure on the dissolution of cellulose. We have conducted 1H NMR spectroscopy of ethanol in a large number of ionic liquids, and found an excellent correlation of the data obtained with the hydrogen acceptor properties (β-values). With this tool in hand, it is possible to distinguish between cellulose-dissolving and non-dissolving ionic liquids. A modulating effect of both, the anion of the non-dissolving ionic liquid and its cation was found in solubility studies with binary ionic liquid mixtures. The study was extended to other non-dissolving liquids, namely water and dimethylsulfoxide, and the effect of the cation was also investigated.

关 键 词：ionic liquids cellulose dissolution hydrogen bonding 

分 类 号：O636.2[理学—高分子化学]