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  • Deposition of precipitated chitosan onto cellulose material
    Fras Zemljič, Lidija ; Ristić, Tijana
    Humans are becoming increasingly concerned about their health and well-being. As a result, there is a significant interest in cellulose material's functionalisation using natural biodegradable and ... non-toxic reagents as, for example, less employed amino polysaccharides and their derivates possessing antimicrobial and antifungal properties. One of the most popular amino polysaccharide is chitosan obtained by alkaline deacetylation of chitin. The antimicrobial activity of chitosan increases with any increase in the degree of deacetylation, due to the increasing number of positively -charged amino groups. Introduced amount of positive charge onto cellulose fibres and consequently, higher antimicrobial activity may increase with the attachment of polysaccharide into colloidal form, in comparison with total soluble form of polysaccharides (chitosan solution). Therefore, the aim of this work was to compare the adsorption of total soluble chitosan (acidic solution) with the adsorption of precipitated colloidal chitosan onto cellulose material. The influence of both chitosan attachment procedures onto the final amino groups' content in functionalised cellulose fibres was studied using ATR-FTIR analysis and conventional spectrophotometric method C.I. Acid Orange 7 (Figure 1). The antimicrobial activities for both chitosan- functionalised cellulose fibres to pathogen bacteria and fungus were also examined.
    Vir: IN-TECH 2010 : proceedings (Str. 319-321)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2010
    Jezik - angleški
    COBISS.SI-ID - 14414614

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