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<p>Poly(lactic acid) (PLA) is a renewable, sustainable, and versatile eco-friendly matrix that originated from natural sources. It has reasonable mechanical attributes; however, it expresses limited functional properties. This study is meant to address the functional limitations of the PLA matrix by incorporating cupric oxide (CuO) nanoparticles (NPs) through glutaraldehyde cross-linking using a solution-casting approach. Incorporating CuO NPs (1–3%, w/w) into the PLA matrix resulted in nanocomposite films with enhanced functional properties. The mechanical and flexural strengths improved significantly on CuO NP mediations. However, the elongation at break lessened for reduced flexibility. The amphiphilic behaviour of the prepared films greatly depended on the treatment history. The CuO NP-loaded films expressed good antibacterial activity against <i>E. coli</i> and <i>S. aureus</i>, and enhanced UV protection, with antioxidant activity ranging from 80 to 90 U/mg. Such findings suggest that the CuO/PLA nanocomposite films are promising candidates for innovative packaging applications.</p>

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Glutaraldehyde-Crosslinked Nano-CuO Incorporated Poly(Lactic Acid) Composite Film with Enhanced Multifunctional Performance for Potential Packaging Applications

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • Zulfiqar Ali Raza,
  • Sabeen Nisar,
  • Muhammad Mohsin

摘要

Poly(lactic acid) (PLA) is a renewable, sustainable, and versatile eco-friendly matrix that originated from natural sources. It has reasonable mechanical attributes; however, it expresses limited functional properties. This study is meant to address the functional limitations of the PLA matrix by incorporating cupric oxide (CuO) nanoparticles (NPs) through glutaraldehyde cross-linking using a solution-casting approach. Incorporating CuO NPs (1–3%, w/w) into the PLA matrix resulted in nanocomposite films with enhanced functional properties. The mechanical and flexural strengths improved significantly on CuO NP mediations. However, the elongation at break lessened for reduced flexibility. The amphiphilic behaviour of the prepared films greatly depended on the treatment history. The CuO NP-loaded films expressed good antibacterial activity against E. coli and S. aureus, and enhanced UV protection, with antioxidant activity ranging from 80 to 90 U/mg. Such findings suggest that the CuO/PLA nanocomposite films are promising candidates for innovative packaging applications.