Abstract
Konjac gel (KG) food is a popular choice among consumers due to its delicious taste, low-calorie content, and ability to provide satiety. The aim of the study was to evaluate the effects of the addition of mung bean starch (MBS), corn starch (CS), and sweet potato starch (SPS) on the water solubility, gel strength, microstructure, and viscosity of KG. The experimental results showed that MBS exhibited the largest amylose content (47.07 ± 1.71%), and SPS had the lowest amylose content (27.92 ± 1.24%). With the increase of starch concentration, the gel strength and viscosity of KG increased, the KG with 3% MBS had higher water solubility and stronger gel strength, and the KG with 3% SPS had better viscosity. In addition, according to the scanning electron microscope, the microstructure of KG without starch was a porous honeycomb, and the network structure of CS/KG was more orderly and uniform. The microstructure of MBS/KG was tightly wrinkled, while the honeycomb structure of SPS/KG was more orderly and the network outline was clearer. The addition of starch could improve the quality of KG, the type of starch used had different effects.
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