Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 207, Issue -, Pages 791-800Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.03.142
Keywords
Enzymatic debranching; Starch-fatty acid complex; Nanoparticles; Pickering emulsion; High internal phase emulsion; pH-stability
Funding
- Na-tional Natural Science Foundation of China [31771929]
- Natural Science Foundation of Guangdong Province [2019A1515012174]
- 111 Project [B17018]
- Science and Technology Project of Zhuhai City [ZH22036207200022PWC]
- Guangdong, China
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This study fabricated high internal phase emulsions (HIPEs) stabilized by debranched starch-capric acid (DBS-CA) complex nanoparticles and evaluated their performance. The DBS-CA nanoparticles displayed enhanced hydrophobicity compared to native starch, and could stabilize HIPEs with high oil volume fraction. The HIPEs showed good storage stability and mechanical strength within pH range from 3 to 11, especially under alkaline conditions.
High internal phase emulsions (HIPEs) stabilized by debranched starch-capric acid (DBS-CA) complex nano particles were fabricated and their performance was evaluated. DBS-CA was prepared through enzymatic debranching and solid encapsulation methods, and displayed V-type crystalline structure. Contact angle measurements show enhanced hydrophobicity of DBS-CA compared to native starch. The DBS-CA nanoparticles have an average size of 463.77 nm and tended to be aggregating as analyzed by scanning electron microscope and dynamic light scattering particle size analysis. When used as a particulate emulsifier, DBS-CA could stabilize HIPEs with oil volume fraction as high as 80%. The HIPEs showed pH-dependent properties; good storage stability and mechanical strength were achieved within pH range from 3 to 11, especially under alkaline conditions. It was proposed that smaller particle size and higher surface charging were responsible for the more tightly connected gel structure and thus their performance. This study demonstrates a novel approach to fabricate food grade Pickering HIPEs, which may have many promising potential applications in the food industry.
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