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. 2022 Oct 1;32(2):181-192.
doi: 10.1007/s10068-022-01179-9. eCollection 2023 Feb.

Development of flaxseed gum/konjac glucomannan with agar as gelling agents with enhanced elastic properties

Jisoo Yang  1 , Young Jin Choi  1   2   3 , Jungwoo Hahn  2
Affiliations

Development of flaxseed gum/konjac glucomannan with agar as gelling agents with enhanced elastic properties

Jisoo Yang et al. Food Sci Biotechnol. .

Abstract

In this study, a natural-based gelling agent comprised of blended flax seed gum (FSG), konjac glucomannan (KG), and agar gel (AG) was developed for application to control the textural properties of foods. The compound gels, including FSG, KG, and AG, were investigated to determine their moisture affinity, including minimum gelling concentration, water binding capacity, water soluble index, and swelling power. In addition, we analyzed the rheological properties of the compound gel through texture analysis, frequency sweep, and creep and recovery. The microstructure of the compound gel was identified and compared with the viscoelastic properties of the gel. Overall, these results showed that the F4K6 (4:6:2 of FSG:KG:AG) could serve as an excellent gelling agent, which endowed food gel with the promoted elastic properties, water capacity, and rigid surface morphology. This work suggests that novel gelling agents, including FSG, KGM, and AG, successfully prepared food gels with improved physicochemical properties.

Supplementary information: The online version contains supplementary material available at 10.1007/s10068-022-01179-9.

Keywords: Agar gel; Flaxseed gum; Gelling agent; Konjac glucomannan; Microstructure; Moisture affinity.

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Conflict of interest statement

Conflict of interestDeclare any conflicts of interest, or state that there are none to declare.

Figures

Fig. 1
Fig. 1
Frequency sweep curves of the blend gels: A Storage modulus (G′) and loss modulus (G″); B tan δ of compound gels as a function of angular frequency (0.01—1 Hz). C Representative creep and recovery compliance (J) data of the compound gels: An instantaneous stress of 30 Pa was applied for 300 s, and recovery was observed for an additional 300 s
Fig. 2
Fig. 2
Microstructure of the compound gels, including A F12; B F10; C F8K2; D F6K4; E F4K6; F F2K8; G K10; and H K12 via SEM images. Samples were shown at magnification of 300× and 2000×, which were in the red box
Fig. 3
Fig. 3
FTIR spectra of the compound gels, including different ratios of FSG, KGM, and AG
Fig. 4
Fig. 4
Scheme of predictive microstructure of the compound gel including FSG, KGM, and AG
See this image and copyright information in PMC

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