Evaluation of water vapour permeability of solventless epoxy ‐ nano talc/montmorrilonite amino-silane coupled coatings
Purpose ‐ The purpose of this paper is to evaluate the water vapour permeability and mechanical properties of a solventless epoxy ‐ nano-platelet nano-composite system compatibilised with an amino-silane. Design/methodology/approach ‐ The performance
of a nano-platelet reinforced coating composite was studied with reference to the water vapour permeability and mechanical properties. The effect of addition of coupling agent on these properties was also studied. Findings ‐ The addition of nano-platelets to the solventless epoxy
system resulted in an increased water vapour permeability which was reduced on the addition of coupling agent. The talc-based films showed a better performance as compared to the montmorillonite based coatings. The mechanical properties of the films increased though the addition of coupling
agent showed a larger increase. The gloss of the coatings was compromised on addition of nano-particles. Comparing coupling agents, the primary amine based silane showed better performance and lower tactoid formation as compared to the secondary amino silane based coupling agent. Research
limitations/implications ‐ The addition of nano-particles to solventless and other eco-friendly coatings needs to be studied further. Various other coupling agents could be studied to further improve the performance of these coatings. Practical implications ‐ The formulation
developed could be used to reduce the water vapour permeability and performance of solventless epoxy coatings, which could be used as anti-corrosive coatings. Originality/value ‐ The study of performance of nano-particles in solventless epoxy coatings and their effect on water
vapour permeability could increase performance of these reduced VOC coatings.
Keywords: Coatings technology; Epoxy coating; Epoxy coatings; Nanocomposites; Nanotechnology; Permeability measurement; Solventless-epoxy; Vapours
Document Type: Research Article
Publication date: 04 January 2013
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