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Updated: Mar 30, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
Effects of polarity, hydrophobicity, and density of ionic liquids on cellulose solubility
Mitsuru Abe1, Kosuke Kuroda1, Daiki Sato1
1Department of Biotechnology, Tokyo University of Agriculture and Technology, Naka-cho, 2-24-16, Koganei, Tokyo 184-8588, Japan. ohnoh@cc.tuat.ac.jp and Functional Ionic Liquids Laboratories, Graduate School of Engineering, Naka-cho, 2-24-16, Koganei, Tokyo 184-8588, Japan.
Abstract:
We have synthesised novel ionic liquids (ILs) to show both cellulose dissolution ability and LCST-type phase transition after mixing with water. To realise both polar and hydrophobic properties, tetraalkylphosphonium cations and a series of carboxylate anions were employed to assume hydrophobic and highly polar properties, respectively. Effects of their alkyl chain length on the water compatibility and cellulose solubility of the corresponding ILs were systematically examined. We succeeded in synthesising novel ILs which dissolve cellulose and separable with water at moderate temperature. Through the present study, we have clarified that not only polarity but also density of ILs is an important factor in designing the ILs for cellulose dissolution.
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