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Development of Poly(lactic acid)/Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Biocomposite Films: Influence of

Luis Jaime Pérez-Córdoba¹, Diana Carmona-Cantillo¹, Cristian Polo-Zamora²

¹Food Packaging and Shelf-Life Research Group (FP&SL), Food Engineering Department, Universidad de Cartagena, Avenida del Consulado Calle 30 No. 48-152, Cartagena de Indias 130015, Colombia.

|June 12, 2026

Summary

Cellulose microfibers from agricultural hulls enhance biocomposite films. Cassava-derived cellulose microfibers (CM) at 3 wt% improved barrier properties in poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) films.

Keywords:

biocomposite films cassava cellulose microfiber hulls melt extrusion potato yam

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Area of Science:

Materials Science
Polymer Science
Sustainable Materials

Background:

Biocomposites offer sustainable alternatives for packaging.
Cellulosic-based fillers can enhance biocomposite performance.
Poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blends are promising bioplastic materials.

Purpose of the Study:

To investigate the effect of cellulose microfibers (CM) from different agricultural sources (yam, potato, cassava) on PLA/PHBV biocomposite properties.
To evaluate the influence of CM concentration (1 and 3 wt%) on the functional characteristics of the biocomposite films.
To determine the optimal CM source and loading for enhancing sustainable packaging material performance.

Main Methods:

Development of PLA/PHBV films reinforced with CM via melt extrusion and compression molding.
Comprehensive evaluation of physicochemical, mechanical, optical, microstructural, thermal, and molecular properties.
Analysis of cellulose microfiber source (yam, potato, cassava) and concentration effects.

Main Results:

Cassava-derived CM at 3 wt% yielded superior barrier properties.
Increased CM content generally reduced solubility, increased moisture, enhanced stiffness, and decreased elongation at break.
CM incorporation negatively impacted structural homogeneity at high loadings and reduced film gloss and transparency.
Thermal stability showed minor variations, with no significant chemical modifications detected.

Conclusions:

The source and concentration of cellulose microfibers significantly influence PLA/PHBV biocomposite properties.
Cassava-derived CM at 3 wt% offers a balanced performance profile for sustainable packaging applications.
Optimizing filler selection and loading is crucial for tailoring biocomposite functional properties.