Abstract
Background: Currently, 75% of global epoxy polymers are based on bisphenol A (BPA), a substance identified as reprotoxic, posing challenges to the development of eco-friendly epoxy coatings.
Methods: Our study reports the synthesis of three novel bio-based anti-corrosion coatings composed of vanillin alcohol diglycidyl ether (DGEVA) and silica nanoparticles, which were added to improve the adhesion to AA2024 substrates.
Findings: The coatings present high adhesion (∼7 MPa) and excellent thermal stability (>295 °C), besides good corrosion protection of the hybrid coating (impedance modulus of ∼4 MΩ cm−2 in 3.5 wt% NaCl for > 68 days). The results reveal that proper silica distribution fosters adhesion and extends lifespan via metal oxide-polymer bonds.
Methods: Our study reports the synthesis of three novel bio-based anti-corrosion coatings composed of vanillin alcohol diglycidyl ether (DGEVA) and silica nanoparticles, which were added to improve the adhesion to AA2024 substrates.
Findings: The coatings present high adhesion (∼7 MPa) and excellent thermal stability (>295 °C), besides good corrosion protection of the hybrid coating (impedance modulus of ∼4 MΩ cm−2 in 3.5 wt% NaCl for > 68 days). The results reveal that proper silica distribution fosters adhesion and extends lifespan via metal oxide-polymer bonds.
| Original language | English |
|---|---|
| Article number | 136774 |
| Journal | Materials Letters |
| Volume | 370 |
| DOIs | |
| Publication status | Published - 1 Sept 2024 |
| MoE publication type | A1 Journal article-refereed |
Funding
We acknowledge the financial support from the European Union’s Horizon 2020 research and innovation programme (grant No 739566), project FunGlass, VEGA 1/0171/21 and VEGA 1/0242/23 fundings.
Keywords
- AA2024
- Bio-based
- Coatings
- DGEVA
- Epoxy