Polysaccharide is a natural renewable resource which is rich, green, edible and degradable, so it is of great concern in the
field of functional membrane material, and has gradually become a hot issue of today's scientific researches. In this paper,
three typical polysaccharides: chitosan, sodium alginate and starch were summarized, and their molecular structures, film-forming properties, preparation and applications of antibacterial films were discussed, which provide reference for the
research and development of antibacterial films based on polysaccharides in the future.
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