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<p>The present work is studying the hydrolytic degradation of poly(lactic acid) (PLA) plasticized with natural wax (Wx) and mixed with Zinc Oxide (ZnO) nanoparticles, functionalized (PLA + Wx + ZnO F) and non-functionalized (PLA + Wx + ZnO Non-F) with triethoxysilane. Different ZnO concentrations of 0.1, and 1&#xa0;wt% functionalized and non-functionalized were added to an 85/15 PLA/Wx matrix using a Brabender internal mixing at 180&#xa0;°C. To study the hydrolytic degradation of the composites, type V specimens (ASTM D638) were obtained by hot melt compression. Hydrolytic degradation was carried out in tridistilled water at a temperature of 50&#xa0;°C and initial pH 7.1. The degradation of PLA + Wx + ZnO F and PLA + Wx + ZnO Non-F blends was monitored for 2 months. Changes in weight, morphology, and the rheological behavior of the blends were evaluated at different periods during degradation.</p> Graphical abstract <p></p>

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Polylactic acid/natural wax/ZnO nanoparticles composite materials for single-use packaging: A study of degradation under laboratory conditions

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Mónica Elvira Mendoza Duarte,
  • Jacqueline Bocarando Chacón,
  • Iván Alziri Estrada Moreno,
  • Imelda Olivas Armendáriz,
  • Alejandro Vega Ríos

摘要

The present work is studying the hydrolytic degradation of poly(lactic acid) (PLA) plasticized with natural wax (Wx) and mixed with Zinc Oxide (ZnO) nanoparticles, functionalized (PLA + Wx + ZnO F) and non-functionalized (PLA + Wx + ZnO Non-F) with triethoxysilane. Different ZnO concentrations of 0.1, and 1 wt% functionalized and non-functionalized were added to an 85/15 PLA/Wx matrix using a Brabender internal mixing at 180 °C. To study the hydrolytic degradation of the composites, type V specimens (ASTM D638) were obtained by hot melt compression. Hydrolytic degradation was carried out in tridistilled water at a temperature of 50 °C and initial pH 7.1. The degradation of PLA + Wx + ZnO F and PLA + Wx + ZnO Non-F blends was monitored for 2 months. Changes in weight, morphology, and the rheological behavior of the blends were evaluated at different periods during degradation.

Graphical abstract