Zhang, X.; Chen, J.; Shao, X.; Li, H.; Jiang, Y.; Zhang, Y.; Yang, D. Structural and Physical Properties of Alginate Pretreated by High-Pressure Homogenization. Polymers2023, 15, 3225.
Zhang, X.; Chen, J.; Shao, X.; Li, H.; Jiang, Y.; Zhang, Y.; Yang, D. Structural and Physical Properties of Alginate Pretreated by High-Pressure Homogenization. Polymers 2023, 15, 3225.
Zhang, X.; Chen, J.; Shao, X.; Li, H.; Jiang, Y.; Zhang, Y.; Yang, D. Structural and Physical Properties of Alginate Pretreated by High-Pressure Homogenization. Polymers2023, 15, 3225.
Zhang, X.; Chen, J.; Shao, X.; Li, H.; Jiang, Y.; Zhang, Y.; Yang, D. Structural and Physical Properties of Alginate Pretreated by High-Pressure Homogenization. Polymers 2023, 15, 3225.
Abstract
In this study, we had investigated the use of high-pressure homogenization (HPH) as a novel pretreatment method for the extraction of sodium alginate (SA) from Laminaria japonica. Our results demonstrated that under optimal condition of 100 MPa HPH pressure, 4 cycles, pH 6.0, and 0.5% ethylene diaminetetra acetic acid tetrasodium salt (EDTA) concentration (w/v) for 3.0 hours, the extraction yield of HPH reached 34%, which was higher than that achieved by previous methods such as complex enzyme hydrolysis (CE), ultrasonic-assisted extraction (UAE), and complex enzyme-ultrasonic combined method (CE-UC). To further characterize the extracted SA, we conducted a comprehensive analysis using SEM, FTIR, MRS, NMR, XRD, TGA, and T-AOC assay. Our findings revealed the following: 1) HPH treatment significantly disrupted the structure of L. japonica cells and reduced their crystallinity to 76.27%, the lowest among all pretreatment samples; 2) the extracted SA had a greater tendency to form elastic gels; and 3) the antioxidant activity of HPH-extracted SA reached 0.02942 mgVceq∙mg-1, which was the highest among all tested methods. Based on these results, we concluded that HPH extraction not only increased the yield of SA but also enhanced its antioxidant activity.
Keywords
physical property; sodium alginate; extraction condition; high pressure homogenization
Subject
Chemistry and Materials Science, Polymers and Plastics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
