de Oliveira Heitor Fernando Nunes, Rinaldi Roberto
Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim (Ruhr) (Germany).
ChemSusChem. 2015 May 11;8(9):1577-84. doi: 10.1002/cssc.201500272. Epub 2015 Apr 8.
In this report, the interactions between fifteen selected ionic liquids (ILs) and cellobiose (CB) are examined by high-precision solution microcalorimetry. The heat of mixing (Δmix H) of CB and ILs, or CB and IL/molecular solvent (MS) solutions, provides the first ever-published measure of the affinity of CB with ILs. Most importantly, we found that there is a very good correlation between the nature of the results found for Δmix H(CB) and the solubility behavior of cellulose. This correlation suggests that Δmix H(CB) offers a good estimate of the enthalpy of dissolution of cellulose even in solvents in which cellulose is insoluble. Therefore, the current findings open up new horizons for unravelling the intricacies of the thermodynamic factors accounting for the spontaneity of cellulose dissolution in ILs or IL/MS solutions.
在本报告中，通过高精度溶液量热法研究了15种选定离子液体（ILs）与纤维二糖（CB）之间的相互作用。CB与ILs或CB与IL/分子溶剂（MS）溶液的混合热（Δmix H）提供了有史以来首次发表的CB与ILs亲和力的测量值。最重要的是，我们发现Δmix H（CB）的结果性质与纤维素的溶解行为之间存在非常好的相关性。这种相关性表明，即使在纤维素不溶的溶剂中，Δmix H（CB）也能很好地估计纤维素的溶解焓。因此，目前的研究结果为揭示解释纤维素在ILs或IL/MS溶液中自发溶解的热力学因素的复杂性开辟了新的视野。
