L2-4060 — Annual report 2013
1.
Antimicrobial and antioxidant functionalization of viscose fabric using chitosan-curcumin formulations

The purpose of this work was to develop new additive combinations between chitosan and curcumin in solutions as a fiber-coating. Diverse additive combinations between chitosan and curcumin in solutions were adsorbed onto viscose fabrics in order to reach the essential antimicrobial and antioxidant functionalization for medical textiles. The goal of this paper was to examine the adsorption of these two compounds as an additive formulation on viscose textile material as well as to analyze the desorptions of both substances fromthe fabric surface. Finally, the antimicrobial and antioxidant properties of viscose fabrics functionalized by chitosan-curcumin formulations were respectively examined. Curcumin as an adsorbate for textiles in combination with chitosan represents an added-value because of its anti-oxidative properties, and showing the potential to enhance existing antimicrobial performance of chitosan when applied using the preferred procedure.

COBISS.SI-ID: 17387030
2.
Characterization of regenerated cellulose fibers antimicrobial functionalized by chitosan

Despite numerous investigations during recent decades in the field of antimicrobially treating textile fibers using chitosan, many obscurities remain regarding the adsorption/desorption behavior of chitosan and the influences of the accessible amino group content on the antimicrobial effectiveness of chitosan-treated fibers. Accordingly, the principal aim of the presented research was to evaluate different regenerated cellulose fibers regarding their abilities to provide highest antimicrobial effectiveness after chitosan treatments. Regenerated cellulose fibers such as viscose, modal and lyocell were antimicrobial functionalized by chitosan from solutions. The adsorption and desorption of the chitosan were analyzed using potentiometric titration, the spectrophotometric method with C.I. Acid orange VII, the Kjeldahl technique and polyelectrolyte titration. Mechanical properties of functionalized fibers were also checked. The antimicrobial activities of chitosan-functionalized cellulose fibers were examined, with regard to pathogen bacteria and fungi. The highest amino group content as a consequence of more intensive chitosan adsorption was found in viscose followed by modal and, finally, by lyocell. It was confirmed that those fibers with higher content of amino groups demonstrated a better reduction in pathogenic bacteria as well as pathogenic fungi. The functionalized cellulose fibers displayed potential utility in different fields of application, as exemplified by medical textiles for single use.

COBISS.SI-ID: 16151574