Еколошки памучни биоактивни материјали на база на хитозан
Date Issued
2017
Author(s)
Тошиќ, Емилија
Abstract
Antimicrobial textile based on chitosan and cotton goods presents excellent opportunity for obtaining eco-antimicrobial textile. The main challenges for obtaining this kind of antimicrobial textile are introduction ecofriendly enzymatic pretreatments, improving washing durability as well as obtaining antimicrobial textile for multiple uses. Washing durability depends on the formed intermolecular bonds between chitosan and cotton. The chitosan can be bonded by covalent (between aldehyde groups from cotton and amino groups from chitosan); electrostatic (between carboxyl groups from the cotton and amino groups from the chitosan); and hydrogen bonds. Stronger intermolecular cotton-chitosan bonds give antimicrobial textiles with improved washing durability. Naturally, the cotton fiber contains hydroxyl groups that can be easily transformed to aldehyde and carboxyl groups by oxidation. Thus, different eco-enzymatic pretreatments, different kinds and degree of oxidation, chitosan with different molecular weight as well as techniques of chitosan application were varied in the dissertation. Additionally, the optimal concentration of chitosan, and concentration and the treatment time for obtaining oxy-cellulose with low, middle and high degree of oxidation are defined. Antimicrobial textile based on the chitosan and carboxyl oxi-cellulose, obtained from oxidized enzymatic scoured cotton, has good antimicrobial properties, good washing durability, lower damages and present good basis for obtaining eco-friendly antimicrobial textile material.
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