期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 418, 期 -, 页码 126-131出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2013.12.014
关键词
Colloids; Cellulose; Ionic liquid; Porous structure
资金
- Adaptable and Seamless Technology Transfer Program through Target-driven RD
- Japan Science and Technology Agency
- Shorai Foundation for Science and Technology
- [23350114]
Cellulose is a ubiquitous natural fiber used in various industrial materials and applications. We prepared micron-sized cellulose particles by the solvent releasing method (SRM) in which cellulose-[Bmim]Cl-N,N-dimethylformamide (DMF) droplets are dispersed in hexadecane (HD) containing dissolved surfactant. The dispersion is then poured into a large amount of 1-butanol. Since 1-butanol is miscible with HD, [Bmim]Cl, and DMF but not with cellulose, the cellulose particles precipitate out. FOR and H-1 NMR analyses confirmed that this technique precipitated cellulose and completely removed [Bmim]Cl and DMF from the cellulose-[Bmim]Cl-DMF droplets. Interestingly, the obtained cellulose particles were almost the same size as the original droplets (cellulose, 7 wt%), indicating a microporous structure of the cellulose particles with a large medium content. Although the microporous structure collapsed as the medium evaporated, it was maintained by a freeze-drying technique. (C) 2013 Elsevier Inc. All rights reserved.
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