Novel and Highly Efficient Antibacterial PLA Composites Prepared with Liquidambar Orientalis Oil and Ag@g-C3N4 Nanocomposite

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Tarih

2025

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Springer

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

Flexible PLA-based antibacterial composite films were prepared using a natural oil, Liquidambar orientalis, as bio-based plasticizer, and 2D graphitic carbon nitride (g-C3N4) decorated with Ag nanoparticles with a particle size of 10–30 nm as antibacterial agent (Ag@g-C3N4). This structurally designed antibacterial nanocomposite was synthesized with the preparation of g-C3N4 by high-temperature annealing followed by the reduction of silver salt onto g-C3N4. The Ag@gC3N4 nanocomposite exhibited a surface area value of 18 g/m2 . PLA/Ag@g-C3N4 composite films were prepared with solution casting method by introducing 30 phr of L. orientalis oil and various amounts (1, 2 and 4 phr) of Ag@g-C3N4. It was found that 30 phr of L. orientalis oil successfully plasticized the PLA and reduced its glass transition temperature from 60 °C to 43 °C and its melting temperature more than 10 °C by reducing the strong interactions and hydrogen bonds between PLA chains. L. orientalis oil also acted as a dispersion agent for the Ag@g-C3N4 nanocomposite particles and significantly improved their antibacterial activity. Antibacterial tests performed using Gram-positive bacteria (Staphylococcus aureus ATCC 25923) and Gram-negative bacteria (Escherichia coli ATCC 25922 and Acinetobacter baumannii ATCC BAA 747) indicated that introducing a small amount of 2D Ag@g-C3N4 nanocomposite particles into PLA yielded superior antibacterial activity.

Açıklama

Anahtar Kelimeler

Polylactic acid, Antibacterial Composite, Graphitic Carbon Nitride (g-C3N4), Silver (Ag) Nanoparticle, Liquidambar orientalis

Kaynak

Journal of Polymers and the Environment

WoS Q Değeri

Scopus Q Değeri

Q1

Cilt

33

Sayı

5

Künye