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Twin-Screw Extrusion Process to Produce Renewable Fiberboards

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Published on: January 27, 2021

Novel Extruded Starch-Beet Pulp Composites for Packaging Foams.

Boussad Abbès¹, Catherine Lacoste², Christophe Bliard³

¹UFR SEN, SFR Condorcet FR CNRS 3417, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims, France.

Materials (Basel, Switzerland)

|April 3, 2020

Summary

A new biobased composite foam made from potato starch and beet pulp offers promising packaging solutions. This material exhibits good compatibility and thermal homogeneity, with properties influenced by humidity.

Keywords:

beet pulp biobased composite extrusion starch

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Last Updated: Dec 25, 2025

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Area of Science:

Materials Science
Polymer Science
Biocomposites

Background:

Conventional packaging foams often rely on petroleum-based materials.
There is a growing demand for sustainable and biodegradable alternatives in the packaging industry.

Purpose of the Study:

To develop and characterize a novel biobased composite foam using potato starch and beet pulp.
To evaluate its suitability for packaging applications, specifically as cushion foams.

Main Methods:

Composite foams were fabricated using a twin-screw extruder.
Material characterization included Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), and Dynamic Mechanical Analysis (DMA).
The influence of relative humidity on viscoelastic properties was investigated.

Main Results:

SEM confirmed homogeneous mixing and good compatibility between potato starch and beet pulp, with the beet pulp's structure being integrated.
DSC analysis revealed a single thermal transition at 153.6 °C, indicating thermal homogeneity.
While the density was higher than conventional foams, it is optimizable through processing parameters. Viscoelastic properties were found to be dependent on relative humidity.

Conclusions:

The developed potato starch-beet pulp composite foam is a promising biobased material for cushion packaging.
The material exhibits good thermal and structural homogeneity.
Further optimization of processing parameters can enhance its properties for specific packaging needs.