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- Title
Utilization of supercritical CO<sub>2</sub> as a processing aid in setting functionality of starch-based materials.
- Authors
Ivanovic, Jasna; Milovanovic, Stoja; Zizovic, Irena
- Abstract
Modification of native starch enables fabrication of a broad spectrum of technologically valuable products for food and non-food applications. Given the increased public concern about food safety and rigorous environmental regulations, a special attention is paid to non-thermal and organic solvent-free treatments of the starch-based materials. Supercritical carbon dioxide (scCO2) is considered to be an attractive processing aid for starch modification due to its unique physicochemical properties such as low viscosity, absence of surface tension, high diffusivity, tuneable density and controllable solvent strength, low critical parameters (7.38 MPa, 31.1°C), availability, and environmental acceptability. This is the first review on different use of scCO2 as a processing aid in setting functionality of starch-based materials including scCO2-assisted gelatinization, fabrication of porous materials, impregnation, and chemical modification. In these processes, scCO2 is used as a plasticizer, blowing agent, solvent, medium or anti-solvent to alter structural, and/or physicochemical properties of starch. The advantages of the scCO2-assisted processes for starch modification over the corresponding conventional techniques were discussed in detail.
- Subjects
CARBON dioxide; STARCH; FOOD safety; VISCOSITY; SURFACE tension
- Publication
Starch / Staerke, 2016, Vol 68, Issue 9/10, p821
- ISSN
0038-9056
- Publication type
Article
- DOI
10.1002/star.201500194