Friedrich Schiller University of Jena, Institute for Organic Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, D-07743 Jena, Germany.
Friedrich Schiller University of Jena, Institute for Organic Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, D-07743 Jena, Germany.
Carbohydr Polym. 2019 Mar 1;207:791-795. doi: 10.1016/j.carbpol.2018.12.036. Epub 2018 Dec 16.
The ionic liquid 1-n-butyl-3-methylimidazolium chloride (BMIMCl) was found to be a non-aqueous solvent for the fast and efficient dissolution of polygalacturonic acid. Up to 5.3 wt% biopolymer could be dissolved by heating the mixture of biopolymer/BMIMCl to 140 °C. About 50% of the polygalacturonic acid groups form the corresponding imidazolium salt at elevated temperature with the solvent, this leads to the solubility of the biopolymer in the surplus of BMIMCl. The salt formation was investigated with nuclear magnetic resonance (NMR)- and Fourier transform infrared (FTIR) spectroscopy as well as by X-ray diffraction (XRD) and is considered to be the driving force for the dissolution of the biopolymer.
离子液体 1-丁基-3-甲基咪唑氯 (BMIMCl) 被发现是一种非水溶剂，可快速有效地溶解聚半乳糖醛酸。通过将聚合物/BMIMCl 混合物加热至 140°C，可溶解高达 5.3wt%的生物聚合物。在较高温度下，约 50%的聚半乳糖醛酸基团与溶剂形成相应的咪唑鎓盐，这导致生物聚合物在 BMIMCl 的剩余部分中的溶解度。通过核磁共振 (NMR) 和傅里叶变换红外 (FTIR) 光谱以及 X 射线衍射 (XRD) 研究了盐的形成，并认为其是溶解生物聚合物的驱动力。
