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RESEARCH PRODUCT
Effect of sodium bicarbonate treatment on mechanical properties of flax-reinforced epoxy composite materials
Vincenzo FioreAntonino ValenzaT. Scalicisubject
Sodium bicarbonateMaterials scienceChemical treatmentMechanical Engineering02 engineering and technologyEpoxy010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical scienceschemistry.chemical_compoundNatural fiber flax epoxy chemical treatment sodium bicarbonate fiber–matrix adhesioneSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryMechanics of MaterialsFiber matrix adhesionvisual_artMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumComposite material0210 nano-technologyNatural fiberdescription
This paper deals with the evaluation of the effect of an eco-friendly and cost-effective surface treatment based on the use of sodium bicarbonate on the mechanical properties of flax-reinforced epoxy composites. To this aim, unidirectional fabrics were soaked for five days in 5 and 10% in weight of sodium bicarbonate solution at 25℃. Quasi-static and dynamic mechanical tests were performed and the fracture surfaces of the composites were analyzed through scanning electron microscopy. Results evidenced that this treatment improves the fiber–matrix adhesion thus increasing the performances of the composites. Treating the fabrics with 10% w/w of bicarbonate solution leads to improvements of ∼20 and ∼45% in tensile strength and modulus of the composites, respectively, compared to untreated ones. Furthermore, by increasing the concentration, negligible changes in the glass transition temperature and reductions in the tanδ peak heights were found. The observation of the fracture surfaces confirmed the beneficial effect of the proposed treatment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-07-11 |