In situ synthesis of Cu/Cu2O nanoparticles on the TEMPO oxidized cotton fabrics
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Radetić, Maja M.
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In situ synthesis of Cu/Cu2O nanoparticles on the cotton fabric discussed in this study relies on adsorption of Cu2+-ions by carboxylate groups generated through the TEMPO-mediated oxidation of cellulose and their subsequent reduction by sodium borohydride. In order to establish the influence of aldehyde and carboxylate groups on the nanoparticles formation, the duration of TEMPO-mediated oxidation was varied. Chemical changes induced by TEMPO-mediated oxidation were evaluated by titrimetric determination of the amounts of aldehyde and carboxylic groups in cotton and FTIR spectroscopy. The presence of Cu/Cu2O nanoparticles on the cotton fabric was confirmed by FE-SEM, AAS and XRD analyses. Antimicrobial activity of synthesized nanoparticles was tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and fungi C. albicans. The extension of TEMPO oxidation time led to an increase of carboxylate group content and consequently, formation of larger amounts of Cu/Cu2O... nanoparticles. All fabricated textile nanocomposites provided excellent antibacterial and acceptable antifungal activity. They also ensured a controlled release of Cu2+-ions in physiological solution which is an imperative for infection prevention.
Кључне речи:Cotton fabric / Cu/Cu2O nanoparticles / TEMPO oxidation / Antimicrobial activity / Cu2+-ions release
Извор:Cellulose, 2018, 25, 1, 829-841
- Утицај величине, облика и структуре наночестица на њихова својства и својства нанокомпозита (RS-172056)
- Функционализација, карактеризација и примена целулозе и деривата целулозе (RS-172029)
ISSN: 0969-0239 (print); 1572-882X (electronic)