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Biomass Chemical Engineering ›› 2022, Vol. 56 ›› Issue (1): 37-46.doi: 10.3969/j.issn.1673-5854.2022.01.006

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Research Progress in Applications of Amphiphilic Algal Polysaccharides in Emulsification and Dispersion

Shanyong WANG(), Haisong QI, Zhouyang XIANG()   

  1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2020-11-27 Online:2022-01-30 Published:2022-01-18
  • Contact: Zhouyang XIANG E-mail:feshanyong@mail.scut.edu.cn;fezyxiang@scut.edu.cn

Abstract:

Algal polysaccharide is a natural gel polysaccharide with great application potentials in emulsification and dispersion. Its hydrophilic and hydrophobic functional groups endow it with natural amphiphilicity, which could improve the interface compatibility between heterogeneous phases. Furthermore, the algal polysaccharide with a natural gel network structure could greatly improve the stability of the sol-gel system by effectively preventing the re-aggregation between the dispersed phases in the system. This paper introduced the chemical compositions, structures and properties of algal polysaccharides, including alginate, fucoidan, carrageenan, agar, ulvan, etc. Their amphiphilic structures were originated from the functional groups on sugar units including hydrophilic groups such as carboxyls and sulfates and hydrophobic groups such as methoxyls, acetyls and proteins. The effects of the amphiphilic structures on molecular configuration, surface activity and rheological properties of algal polysaccharides and further on their applications in emulsification and dispersion were summarized. At the same time, the researches on enhancing amphiphilic properties of algal polysaccharides by physical or chemical methods were introduced. The research progress of the applications of algal polysaccharide derivatives in emulsification and dispersion was summarized. Finally, the direction of enhancing the interfacial adsorption activity of algal polysaccharides was prospected.

Key words: algal polysaccharide, amphiphilicity, emulsification, dispersion, interface compatibility, gel network

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