Abstract
A comparison study of the structures and properties of starches regenerated from 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) using different anti-solvents (water, ethanol, or both water and ethanol) was conducted. The starch regenerated with water presented a V-type crystalline structure whereas the one regenerated in ethanol displayed amorphous structure. Moreover, when an ethanol–water–ethanol method was used for regeneration, the product showed a weak V-type crystalline structure. SAXS and FTIR were also used to investigate the molecular order of native and regenerated starches. With water used for regeneration, the aggregation and rearrangement of starch molecules occurred more easily. The increased enzyme resistance and thermal stability of regenerated starch with water could be ascribed to the rearrangement of molecular chains forming an aggregated structure with some degree of order. The reconstitution of starch molecules during regeneration with different anti-solvents changed the multiscale structures and properties of the starch.
| Original language | English |
|---|---|
| Pages (from-to) | 1231-1238 |
| Number of pages | 8 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 56 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 15 Sept 2018 |
Bibliographical note
Publisher Copyright:© 2018 Wiley Periodicals, Inc.
Funding
This work is supported by the National Natural Science Foundation of China (NSFC) –Guangdong Joint Foundation Key Project (U1501214), the Key Project of Guangzhou Science and Technology Program (“The regulation mechanism and key technology of cereal starch digestibility and nutrition function”, 2018-1003-sf-0103), the YangFan Innovative and Entrepreneurial Research Team Project (No. 2014YT02S029). Part of this research was undertaken on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia. X. Tan also would like to thank the China Scholarship Council (CSC) for providing research funding for his visiting studies at The University of Queensland (UQ) as part of his Ph.D. work.
| Funders | Funder number |
|---|---|
| Guangdong Innovative and Entrepreneurial Research Team Program | 2014YT02S029 |
| University of Queensland | |
| National Natural Science Foundation of China | U1501214 |
| Guangzhou Science and Technology Program key projects | 2018-1003-sf-0103 |
| China Scholarship Council |
Keywords
- 1-ethyl-3-methylimidazolium acetate
- anti-solvent
- ionic liquid
- regeneration
- starch
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Materials Chemistry