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Published on: February 19, 2016
Solid encapsulation of lauric acid into "empty" V-type starch: Structural characteristics and emulsifying properties.
Liang Huang1, Songnan Li2, Chin Ping Tan3
1School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China.
This study developed a novel hydrophobic modified starch emulsifier by encapsulating lauric acid into V-type starch. The resulting starch-fatty acid complex (SFAC) shows excellent emulsifying properties and stability for Pickering emulsions.
Area of Science:
- Food Science
- Materials Science
- Polymer Chemistry
Background:
- Starch modification is crucial for developing novel food ingredients.
- Fatty acid encapsulation enhances starch properties for emulsification.
Purpose of the Study:
- To synthesize and characterize starch-fatty acid complexes (SFACs).
- To investigate the effect of complexing temperature on SFAC structure and properties.
- To evaluate SFACs as stabilizers for Pickering emulsions.
Main Methods:
- Solid encapsulation of lauric acid into V-type starch.
- X-ray diffraction and differential scanning calorimetry for structural analysis.
- Contact angle measurements for hydrophobicity assessment.
- Particle size analysis and emulsion stability testing.
Main Results:
- SFACs primarily formed type-I amylose inclusion complexes.
- Hydrophobic properties and particle size of SFACs were temperature-dependent.
- SFACs effectively stabilized Pickering emulsions with small droplet sizes.
- Emulsions exhibited long-term storage stability up to 30 days due to gel network formation.
Conclusions:
- Hydrophobic modified starch (SFAC) is a promising multifunctional emulsifier.
- Temperature control is key for tailoring SFAC properties.
- SFACs are effective in creating stable starch-based Pickering emulsion gels.
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