Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 128, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2020.109397
Keywords
Citrus dietary fiber; Chemo-mechanical treatment; Alkaline treatment; NMR; Functional properties
Categories
Funding
- Natural Science Foundation of Guangdong Province, China [2020A1515010440]
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In this research, the citrus fiber was modified by the alkali combined with high-speed homogenization (chemomechanical treatment) to improve its functional properties. The singly alkaline treated fiber was also evaluated to help us better understand the chemo-mechanical treatment's effect on citrus fiber. We compared the properties of modified citrus fibers with the untreated one and a commercial one (AQ Plus) which had excellent water holding capacity. The chemo-mechanical treated fiber's water swelling capacity was significantly improved to 35.56 mL/g (from 4.86 mL/g), higher than that of AQ Plus (28.25 mL/g). Its water holding capacity was increased to 25.52 g/g from 8.24 g/g, similar to that of AQ Plus (25.28 g/g). The chemo-mechanical treatment destroyed the citrus fiber's crystalline region, helped it form a rougher surface and porous inner structure, increased its soluble dietary fiber content and exposed more hydrogen bonds to water. Citrus fiber obtained from this chemo-mechanical method could be potentially used as food ingredients.
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