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Ionic Inter-Particle Complexation Effect on the Performance of Waterborne Coatings
Maialen Argaiz1, Fernando Ruipérez2, Miren Aguirre1
1POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea, 72, 20018 Donostia-San Sebastián, Spain.
Ionic complexation between oppositely charged polymer particles enhances waterborne (meth)acrylic coatings. This method improves mechanical flexibility and significantly reduces water penetration, offering a promising approach for reinforcing these coatings.
Area of Science:
- Polymer Chemistry
- Materials Science
- Surface Chemistry
Background:
- Waterborne (meth)acrylic coatings face performance limitations due to their film formation process.
- Achieving performance comparable to solvent-borne counterparts remains a challenge for waterborne systems.
Purpose of the Study:
- To investigate the impact of ionic complexation on the performance of waterborne polymer films.
- To enhance the properties of waterborne (meth)acrylic coatings through controlled particle interactions.
Main Methods:
- Charged polymer particles using ionic monomers (sodium styrene sulfonate, 2-(dimethylamino)ethyl methacrylate).
- Induced ionic complexation by blending oppositely charged latexes.
- Evaluated film performance using tensile tests, water uptake measurements, and Fluorescence Resonance Energy Transfer (FRET) analysis.
Main Results:
- Ionic complexation slightly increased mechanical resistance and film flexibility.
- Water penetration into the polymer films was significantly reduced.
- Ionic complexation between particles was confirmed to hinder polymer chain interdiffusion.
Conclusions:
- Ionic complexation between sulfonate-amine functionalized particles is an effective strategy for reinforcing waterborne coatings.
- This approach offers a promising method to overcome performance limitations in waterborne polymer films.
- Reduced polymer chain interdiffusion is a key factor in the enhanced properties of these ionic complexed coatings.
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