This study investigates the dual functionality of Tannic Acid (TA), a bio-derived polyphenol, as a surface modifier for ultra-high molecular weight polyethylene (UHMWPE) fibers and as a hardener for diglycidyl ether of bisphenol A (DGEBA) epoxy resin, aimed at enhancing composite laminate performance and sustainability. The surface characteristics of UHMWPE fibers were investigated by Fourier transform infrared spectroscopy and scanning electron microscopy. The TA-modified fibers exhibited functional groups that enhanced their polarity and improved their compatibility with the epoxy matrix. Furthermore, thermogravimetric analysis revealed an increase in thermal degradation onset from 336 degrees C to 357 degrees C after TA treatment. The hand lay-up method was used to manufacture composite UHMWPE laminates impregnated with TA-hardened resins at different TA concentrations. Cone calorimetry results revealed improved fire resistance for TA-loaded composites, with a 44% reduction in peak heat release rate (PHRR) respect to the control sample, as well as a better fire performance index. Composite laminates manufactured with TA-modified fibers and TA-hardened resin demonstrated up to 45% improvement in tensile strength.Highlights Tannic acid (TA) proves to be a sustainable alternative to petroleum-based hardeners. TA enhances UHMWPE fibers' thermal stability and adhesion to epoxy. TA-modified fibers show an increase in thermal degradation onset. TA-hardening of epoxy improves fire resistance, reducing PHRR by 44%. Composite laminates with TA show a 45% increase in tensile strength.
UHMWPE composites: Effect of flame retardant tannic acid as coating agent and hardener for epoxy resin systems / Quero, A.; Colli, M.; Silvestro, I.; Frache, A.; Fossat, E.. - In: POLYMER COMPOSITES. - ISSN 0272-8397. - (2025). [10.1002/pc.30020]
UHMWPE composites: Effect of flame retardant tannic acid as coating agent and hardener for epoxy resin systems
Quero A.;Frache A.;
2025
Abstract
This study investigates the dual functionality of Tannic Acid (TA), a bio-derived polyphenol, as a surface modifier for ultra-high molecular weight polyethylene (UHMWPE) fibers and as a hardener for diglycidyl ether of bisphenol A (DGEBA) epoxy resin, aimed at enhancing composite laminate performance and sustainability. The surface characteristics of UHMWPE fibers were investigated by Fourier transform infrared spectroscopy and scanning electron microscopy. The TA-modified fibers exhibited functional groups that enhanced their polarity and improved their compatibility with the epoxy matrix. Furthermore, thermogravimetric analysis revealed an increase in thermal degradation onset from 336 degrees C to 357 degrees C after TA treatment. The hand lay-up method was used to manufacture composite UHMWPE laminates impregnated with TA-hardened resins at different TA concentrations. Cone calorimetry results revealed improved fire resistance for TA-loaded composites, with a 44% reduction in peak heat release rate (PHRR) respect to the control sample, as well as a better fire performance index. Composite laminates manufactured with TA-modified fibers and TA-hardened resin demonstrated up to 45% improvement in tensile strength.Highlights Tannic acid (TA) proves to be a sustainable alternative to petroleum-based hardeners. TA enhances UHMWPE fibers' thermal stability and adhesion to epoxy. TA-modified fibers show an increase in thermal degradation onset. TA-hardening of epoxy improves fire resistance, reducing PHRR by 44%. Composite laminates with TA show a 45% increase in tensile strength.File | Dimensione | Formato | |
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Polymer Composites - 2025 - Quero - UHMWPE composites Effect of flame retardant tannic acid as coating agent and hardener.pdf
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https://hdl.handle.net/11583/3000814