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Please use this identifier to cite or link to this item: http://hdl.handle.net/11129/6130

Title: Antibacterial Quaternary Chitosan / Alginate Polyelectrolyte Hydrogel Films with Silver Nanoparticles
Authors: Gazi, Mustafa (Supervisor)
Güran, Mümtaz (Co-Supervisor)
Vaizoğlu, Buse
Eastern Mediterranean University, Faculty of Arts and Sciences, Dept. of Chemistry
Keywords: Chemistry Department
Quaternary chitosan, Alginate, Silver Nanoparticles, Polyelectrolyte Film, Antibacterial, Antifungal, S. aureus, E. coli
Issue Date: Feb-2022
Publisher: Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ)
Citation: Vaizoğlu, Buse. (2022). Antibacterial Quaternary Chitosan / Alginate Polyelectrolyte Hydrogel Films with Silver Nanoparticles. Thesis (M.S.), Eastern Mediterranean University, Institute of Graduate Studies and Research, Dept. of Chemistry, Famagusta: North Cyprus.
Abstract: Polymeric materials have an increasing attention due to their cost effective, easy to use, bio degradable and bio compatible properties. Particularly chitosan and alginate are two natural polymers which form fılm by making polyelectrolyte complex to use as antimicrobial agent. In order to enhance the antimicrobial activity of chitosan quaternization of the polymer is one strategy. In this regard, Quaternary chitosan was synthesized with glycidyltrimethylammonium chloride to fabricate polyelectrolyte bio composite film with alginate. Two different mililiters (10 mL and 20 mL) of silver nitrate solution were used to obtain a quaternary chitosan-alginate film loaded with silver nanoparticles. Polyelectrolyte hydrogel films were prepared by the simple method without using any other solvent. The characterization of the polyelectrolyte films was made by FT-IR Spectroscopy and the colour of the films changed from white to brown after adding silver solution, indicating that silver nanoparticles were loaded on the film. In addition, the immediate whitening of the film thrown into the PBS solution with the swelling test indicates that the film swells and releases silver nanoparticles into the environment. The antibacterial and antifungal activity of four different kind of films (chitosan alginate (V4), quaternary chitosan-alginate (V2), quaternary chitosan-alginate with 10mL silver (V1) and quaternary chitosan-alginate with 20 mL silver (V3)) were compared by the disk diffusion method and antimicrobial effect of silver was observed. The films have a hydrophilic character. In this study we fabricated a novel promising antimicrobial material which may use as wound healing or disinfection agent especially against common pathogens Staphylococcus aureus (S. aureus), Enterococcus faecalis (E. faecalis), Escherichia coli (E. coli), Klebsiella pneumoniae (K. pneumoniae).
ÖZ: Polimerik malzemeler, uygun maliyetli, kullanımı kolay, biyolojik olarak uyumlu ve parçalanabilir olduklarından dolayı artan bir ilgiye sahiptirler. Özellikle kitosan ve aljinat, antimikrobiyal ajan olarak kullanmak üzere polielektrolit kompleks film oluşturan iki doğal polimerdir. Antimikrobiyal aktiviteyi artırmak için de bir strateji kitosanın kuaternarizasyonudur. Bu bağlamda, aljinat ile polielektrolit biyokompozit filmi üretmek için glisidiltrimetilamonyum klorür ile kuaterner kitosan sentezlendi. Gümüş nanoparçacık yüklü kuaterner kitosan-aljinat filmi elde etmek için iki farklı mililitrelerde (10 ml ve 20 mL) gümüş nitrat çözeltisi kullanıldı. Polielektrolit hidrojel filmler, başka bir çözücü kullanılmadan basit yöntemle hazırlanmıştır. Polielektrolit filmlerin karakterizasyonu FT-IR Spektroskopisi ile yapılmış ve filmlerin renginin gümüş çözeltisi eklendikten sonar beyazdan kahverengiye değişmesi, gümüş nanopartiküllerin filme yüklendiğini göstermiştir. Ayrıca şişme testi ile PBS solüsyonuna atılan filmin hemen beyazlaması, filmin şiştiğini ve ortama gümüş nanopartiküller saldığını gösterir. Dört farklı film çeşidinin (kitosan-aljinat (V4), kuaterner kitosan-aljinat (V2), kuaterner kitosan-aljinat ile 10 mL gümüş (V1) ve kuaterner kitosan-aljinat ile 20 mL gümüş (V3)) antibakteriyel ve antifungal aktivitesi disk difüzyon yöntemi ile karşılaştırıldı ve gümüşün antimikrobiyal etkisi gözlendi. Filmler hidrofilik bir karaktere sahiptir. Bu çalışmada özellikle yaygın patojenler Staphylococcus aureus (S. aureus), Enterococcus faecalis (E. faecalis), Escherichia coli (E. coli), Klebsiella pneumoniae (Kpneumoniae)’ye karşı yara iyileştirme veya dezenfeksiyon maddesi olarak kullanılabilecek umut verici yeni bir antimikrobiyal materyal ürettik.
Description: Master of Science in Chemistry. Institute of Graduate Studies and Research. Thesis (M.S.) - Eastern Mediterranean University, Faculty of Arts and Sciences, Dept. of Chemistry, 2022. Co-Supervisor: Assoc. Prof. Dr. Mümtaz Güran and Supervisor: Prof. Dr. Mustafa Gazi
URI: http://hdl.handle.net/11129/6130
Appears in Collections:Theses (Master's and Ph.D) – Chemistry

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