Journal
FOOD CHEMISTRY
Volume 274, Issue -, Pages 351-359Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.09.034
Keywords
Native wheat starch; A-type wheat starch granule; B-type wheat starch granule; Repeated heat-moisture treatment; Compound enzymes; Nitrogen adsorption
Funding
- Key Research and Development Program of Anhui Province, China [16030701079]
- National Key R&D Program of China [2017YFD0400405]
- Natural Science Foundation of Anhui Province, China [1708085QC78]
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Effects of the combination of repeated heat-moisture treatment for two times (2-HMT) and compound enzymes hydrolysis on structural and physicochemical properties of porous wheat starches were investigated. The dual-modification resulted in the formation of more pores on the surface of native starches, as revealed by SEM. Compared with single-modified starch samples, the porous starch samples treated by dual-modification exhibited higher gelatinization temperature, lower gelatinization enthalpy and higher crystallinity, as determined by DSC, FT-IR and XRD. Batch adsorption experiments manifested that the dual-modified starch samples exhibited higher adsorption capacities for water, oil and methylene blue. Moreover, the adsorption behaviors of the porous A-type starch granules with or without 2-HMT fitted Freundlich isotherm model well. Low-temperature nitrogen adsorption results showed that dual modifications greatly increased specific surface area and total pore volume of the starch samples. The present study suggests that the dual-modification is an attractive alternative for preparing porous wheat starches.
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