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Molecular Partitioning in Ternary Solutions of Cellulose

Published

Author(s)

Xin Zhang, Yimin NMN Mao, Madhu Sudan Tyagi, Feng Jiang, Doug Henderson, Bo Jiang, Zhiwei Lin, Ronald L. Jones, Liangbing Hu, Robert M. Briber, Howard Wang

Abstract

Scattering measurements on the structure and dynamics of ternary solutions from dissolving microcrystalline cellulose (MC) in mixtures of ionic liquid (IL) and polar organic solvent have revealed dissolved cellulose molecular coils and partitioning of IL to coexisting states. The structure partitioning manifests ILs adsorbed to cellulose coils and ones clustered into spherical micelles in solutions, while the dynamics partitioning shows dynamic heterogeneities of ILs with slow dynamics resembling those in the neat IL and fast ones coupled with solvents. The composition dependence of molecular partitioning results in a miscibility gap in dilute cellulose solutions and a phase boundary criterion of IL / MC 3 molar ratio in more concentrated regimes. The two characteristics together define the main features of the dissolution phase diagram of ternary cellulose mixtures at room temperature.
Citation
Carbohydrate Polymers
Volume
220

Citation

Zhang, X. , Mao, Y. , Tyagi, M. , Jiang, F. , Henderson, D. , Jiang, B. , Lin, Z. , Jones, R. , Hu, L. , Briber, R. and Wang, H. (2019), Molecular Partitioning in Ternary Solutions of Cellulose, Carbohydrate Polymers, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925979 (Accessed July 6, 2022)
Created September 14, 2019, Updated October 12, 2021