Modification of gadung (Dioscorea hispida Dennst) starch by ultrasonication and freeze moisture treatment

IF 6.2 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-08-03 DOI:10.1016/j.carpta.2024.100552

Edy Subroto , Fitriani Sholihat , Endah Wulandari , Mohd Nizam Lani , Rossi Indiarto

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引用次数: 0

Abstract

Gadung starch (Dioscorea hispida dennst.) has several weaknesses related to its low functional properties and stability. Physical modifications of ultrasonication and Freeze Moisture Treatment (FMT) can be an alternative to improve the functional properties by forming cracks and cavities in starch. Hence, this research aimed to obtain modified gadung starch with better functional and physicochemical properties through ultrasonication and FMT. The combination of ultrasonication 30 min + FMT 70 % produced the desired characteristics. This includes the functional properties of starch, which revealed that swelling volume increased by 1.19-fold, solubility increased by 1.17-fold, and Water Absorption Capacity (WAC) increased by 1.31-fold. The stability of the starch paste was better, with a decrease in Breakdown Viscosity (BV) from 3093.50 to 2408.00 cP. The physicochemical properties exhibited that the surface of the starch granules had cracks and cavities, the starch was more amorphous, and the crystallinity decreased from 35.75 to 32.06 and the smaller ratio of the bands at 1045/1022 from 1.412 to 1.396 by FTIR spectra. However, the treatments did not cause changes in crystallinity type (B-type) and functional groups. Therefore, the combination treatment of ultrasonication and FMT effectively improved the properties by forming amorphous gadung starch.

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通过超声波和冷冻保湿处理改变嘎栋（Dioscorea hispida Dennst）淀粉

加东淀粉（Dioscorea hispida dennst.）有几个弱点，即功能特性和稳定性较低。超声波和冷冻水分处理（FMT）等物理改性方法可以通过在淀粉中形成裂缝和空洞来改善其功能特性。因此，本研究旨在通过超声处理和冷冻水分处理获得具有更好功能和理化特性的改性嘎当淀粉。超声波处理 30 分钟 + FMT 70 % 的组合产生了所需的特性。这包括淀粉的功能特性，结果显示膨胀体积增加了 1.19 倍，溶解度增加了 1.17 倍，吸水能力（WAC）增加了 1.31 倍。淀粉糊的稳定性更好，分解粘度（BV）从 3093.50 cP 降至 2408.00 cP。傅立叶变换红外光谱显示，淀粉颗粒表面出现裂缝和空洞，淀粉更加无定形，结晶度从 35.75 降至 32.06，1045/1022 波段的比值从 1.412 降至 1.396。然而，这些处理并未引起结晶度类型（B 型）和官能团的变化。因此，将超声波处理和 FMT 处理相结合，可通过形成无定形的嘎栋淀粉有效改善其特性。

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来源期刊

Carbohydrate Polymer Technologies and Applications

CiteScore

8.70

自引率

0.00%

发文量