Antimicrobial Effect of Waterborne Polyurethane-Based Cellulose Nanofibril/Silver Nanoparticles Composites and Acacia concinna (Willd.) DC Extract (Shikakai)

• Published in: Polymers Vol. 16; no. 19; p. 2683
• Main Authors: Taung Mai, Lu Lu, San, H'ng Paik, Aung, Min Min, Uyama, Hiroshi, Mohamed, Ainun Zuriyati, Bahrin, Ezyana Kamal, Masarudin, Mas Jaffri, Mohamad Zulkifli, Azra Afrina Binti, Chew, Tung Woey
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 24-09-2024; MDPI
• Subjects: Acacia concinna (Willd.) DC (AC); Antiinfectives and antibacterials; Antimicrobial agents; Carbonyls; Cellulose; cellulose nano fibrils (CNFs); Chemicals; Composite materials; Ethanol; Flavonoids; Food packaging; Functional groups; Functional materials; Gram-positive bacteria; Metabolites; Methanol; Microorganisms; Nanocomposites; Nanomaterials; Nanoparticles; Phenols; Polyurethane resins; Saponins; Silver; silver nanoparticles (AgNPs); Sulfuric acid; Surface plasmon resonance; Temperature; Terpenes; waterborne polyurethane (WPU); United States > US; Malaysia; Germany; Acacia concinna (Willd.) DC (AC); cellulose nano fibrils (CNFs); waterborne polyurethane (WPU); silver nanoparticles (AgNPs)
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym16192683

Antimicrobial coatings are becoming increasingly popular in functional material modification and are essential in addressing microbial infection challenges. In this study, the phytochemical and antimicrobial potential of aqueous, 80% methanol and 80% ethanol pod extracts of
(Willd.) DC (AC) and its application in the green in situ (one pot) synthesis of silver nanoparticles on Cellulose nano fibrils (CNF) and Waterborne polyurethane (WPU) were prepared. The phytochemical evaluation of
crude extracts showed the presence of alkaloids, flavonoids, phenols, tannins, terpenoids, saponins, steroids. The surface plasmon Resonance peak of CNF/AC-AgNPs was 450 nm and the FTIR result confirmed functional groups such as carbonyl, phenols and carboxyl were present which was important for the bio-reduction of silver nanoparticles. The crude AC aqueous pods extract against Gram-positive and Gram-negative bacteria compared with AC ethanol and AC methanol extracts. The WPU/CNF/AC-AgNPs composite dispersion was also good in terms of its antibacterial activities. The WPU/CNF/AC-AgNPs nanocomposites could be applied as bifunctional nanofillers as an antimicrobial agent in food packaging systems and other biological applications.