Dimethyl sulfoxide assisted dissolution of cellulose in 1-ethyl-3-methylimidazoium acetate: small angle neutron scattering and rheological studies
| Autor: | Changyuan Yu, Mingkun Yang, Blake A. Simmons, Seema Singh, Wenwen Zhao, Gang Cheng, Shizeng Wang |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Dimethyl sulfoxide 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Small-angle neutron scattering 0104 chemical sciences Solvent chemistry.chemical_compound chemistry Rheology Ionic liquid Cellulose 0210 nano-technology Dissolution Nuclear chemistry |
| Zdroj: | Cellulose. 26:2243-2253 |
| ISSN: | 1572-882X 0969-0239 |
| Popis: | Dimethyl sulfoxide (DMSO) has been successfully used as a co-solvent in cellulose and biomass processing by ionic liquids (ILs). However, the interactions between cellulose, DMSO and ILs are still not fully understood and conflicting results exist in literature. In this work, solution structures of mixture solvents of DMSO-d6 and 1-ethyl-3-methyl-imidazolium acetate ([C2C1Im][OAc]) were studied by small angle neutron scattering (SANS) where the concentration of [C2C1Im][OAc] in DMSO-d6 varied from 80 to 1 wt%. In addition, the solution structure of cellulose in 10 wt% ([C2C1Im][OAc]) + 90 wt% DMSO mixture solvent were evaluated by rheology and SANS. The results were discussed considering the rigidity of cellulose chains and compared them with the marginal solution behavior of semi-flexible polymers. |
| Databáze: | OpenAIRE |
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