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Related Experiment Video

Updated: Jan 10, 2026

Fabrication and Design of Wood-Based High-Performance Composites

Fabrication and Design of Wood-Based High-Performance Composites

Published on: November 9, 2019

Bio-Based Epoxy Adhesives Reinforced with Recycled Fillers.

Alberto Cellai¹, Lorenzo Pezzana¹, Valentina Casalegno¹

¹Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.

|November 27, 2025

Summary

This study developed a sustainable bio-based adhesive using recycled fillers like carbon fibers and mineral wool. The new adhesive shows improved stiffness and strength for structural bonding applications.

Keywords:

adhesives biobased circular economy recycling sustainability thermal curing

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Area of Science:

Materials Science
Polymer Chemistry
Sustainable Engineering

Background:

Developing sustainable adhesives is crucial for reducing environmental impact.
Bio-based resins offer potential alternatives to petroleum-based polymers.
Incorporating recycled materials aligns with circular economy principles.

Purpose of the Study:

To investigate a bio-based thermosetting adhesive system using recycled fillers (recycled carbon fibers and mineral wool).
To evaluate the impact of recycled fillers on the curing behavior, thermal stability, and mechanical performance of the adhesive.
To assess the potential of this sustainable adhesive for structural bonding applications.

Main Methods:

Formulation of Diglycidylether of vanillyl alcohol (DGEVA) based adhesive with varying proportions of recycled carbon fibers (RCFs) and mineral wool (MW).
Characterization using FTIR spectroscopy, Differential Scanning Calorimetry (DSC), and dynamic DSC for curing behavior and kinetics.
Evaluation of mechanical and thermomechanical properties via Dynamic Mechanical Thermal Analysis (DMTA) and shear lap testing.
Morphological analysis using Scanning Electron Microscopy (SEM).

Main Results:

Increasing filler content (RCFs and MW) influenced polymerization kinetics, increasing activation energy but maintaining high conversion rates.
Adhesive formulations with recycled fillers demonstrated enhanced stiffness and adhesion strength compared to the neat resin.
Improved performance was particularly noted in Carbon-Matrix Composite (CMC) joints.
SEM analysis provided insights into filler dispersion and interface adhesion.

Conclusions:

The DGEVA-based adhesive system reinforced with recycled fillers presents a viable and sustainable option for structural bonding.
This approach contributes to waste valorization and the development of green materials for engineering.
The study highlights the potential of bio-based adhesives with recycled content for enhanced performance and environmental benefits.