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KMID : 1007520170260030697
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Food Science and Biotechnology
2017 Volume.26 No. 3 p.697 ~ p.706
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Effects of microwave-discharged cold plasma on synthesis and characteristics of citrate derivatives of corn starch granules
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Kim Hyun-Seok
Min Sea-Cheol
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Abstract
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The objectives of this study were to identify the potential function of microwave-discharged cold plasma (MCP) treatment in preparing starch citrate (SC) nonthermally and to investigate the physicochemical properties of MCP-induced starch citrates. SCs were prepared by either dry heating in a convection oven (as a reaction control; COV) or MCP treatment using N2 (N2-MCP) and N2?O2 (N2/O2-MCP). Fourier transform-infrared spectra of the MCP-induced SCs revealed new peaks indicating ester bonds. The molar degree of substation was 0.013?0.015 depending on the reaction conditions. The plasma-formed dents were observed more on the surfaces of granular starch citrates (GSCs) treated with N2/O2-MCP than N2-MCP. Relative to COV, MCP-induced GSCs possessed lower resistant starch content, solubility, and gelatinization temperatures and higher swelling power. The pasting viscosities were higher with N2-MCP GSCs and lower with N2/O2-MCP GSCs. The results suggest that MCP can be used as a novel catalyst for non-thermal starch citration.
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KEYWORD
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Common corn starch, Starch citrate, Nonthermal starch citration, Cold plasma
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