Physicochemical characterization and cosmetic application of kelp blanching water polysaccharides.

Peihua Liu, Jingjing Hu, Qiangqiang Wang, Jianhua Tan, Jian Wei, Hongbo Yang, Shuping Tang, Hongliang Huang, Yongdong Zou, Zebo Huang

International journal of biological macromolecules 2023 Sep 01

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Seaweeds account for half of global mariculture and have become a key player in bio-based industries. Seaweed process typically starts with hot water blanching that helps reduce postharvest quality deterioration but also generates large amounts of hydrothermal waste. This study aims to explore the feasibility of isolating water-soluble biopolymers from seaweed hydrothermal waste and their potential applications. Using Saccharina japonica (formerly Laminaria japonica) blanching water as example, 2.9 g/L of polymeric substances were efficiently isolated by ultrafiltration, implying biopolymer coproduction potential of ~5.8 kt from blanching wastewater of current kelp industry. Physicochemical characterizations revealed polysaccharidic nature of the biopolymers, with high contents of fucose, uronic acids and sulfate, showing distinct but also overlapping structural features with hot water-extracted kelp polysaccharides. The main fraction of the blanching water polymers after anion exchange chromatography was acidic polysaccharide, the major backbone residues of which were (1-4) linked mannopyranose, (1-4) linked gulopyranose and (1-2) linked fucopyranose while the branched residues were primarily 1,3,4-, 1,2,4- and 1,4,6-linked hexoses but also 1,3,4-fucopyranose. Furthermore, the polysaccharides were found to have a good compatibility in cosmetic creams with added cohesiveness and freshness, demonstrating the application potential of such natural biopolymers from currently underexplored seaweed blanching water. Copyright © 2023 Elsevier B.V. All rights reserved.

Citation

Peihua Liu, Jingjing Hu, Qiangqiang Wang, Jianhua Tan, Jian Wei, Hongbo Yang, Shuping Tang, Hongliang Huang, Yongdong Zou, Zebo Huang. Physicochemical characterization and cosmetic application of kelp blanching water polysaccharides. International journal of biological macromolecules. 2023 Sep 01;248:125981