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Sustainable-solvent-induced polymorphism in chitin films.
- Source :
- Green Chemistry; 8/7/2016, Vol. 18 Issue 15, p4303-4311, 9p
- Publication Year :
- 2016
-
Abstract
- We report a simple route to produce chitin films with different crystalline structures. The use of a green deep-eutectic-solvent (DES) choline chloride : urea (CCU) or hexafluoroisopropanol (HFIP) allows fine-tuning of the crystallization process to produce films with β-dihydrated- or γ-chitin structures. With the advent of a Grazing-Incidence X-Ray Diffraction (GIXD) technique, we propose a new and fully indexed structure of γ-chitin. This new γ-structure is modeled as a super-cell, in contrast to the idea of a simple physical mixture of α and β phases. The influence of purification, dissolution or dispersion media on chitin's crystallinity was investigated by FTIR, solid-state NMR and XRD. Results presented here may trigger applications in which a well-defined crystalline structure is required. [ABSTRACT FROM AUTHOR]
- Subjects :
- CHITIN
SOLVENTS
CRYSTAL structure
CHOLINE chloride
CRYSTALLIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 18
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 116945617
- Full Text :
- https://doi.org/10.1039/c6gc00628k