An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites
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Nivedhitha Durgam Muralidharan
and
Venkatachalam Gopalan
Abstract
Natural fiber reinforced polymeric composites perform poor in mechanical and thermal properties at elevated temperatures due to the cellulose and hemicellulose contents of natural fiber start degrading at elevated temperature. In this research work, flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites have been experimentally investigated and reported. Two composite laminates, one with 6 % NaOH Alkali treated and another with untreated woven kenaf mats, were fabricated by hand lay-up technique followed by compression molding with 40 % fiber weight fractions. Flame retardancy test and various thermal characteristics studies such as thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), heat deflection temperature (HDT), and morphological analysis via scanning electron microscopy (SEM) tests were carried out. The results showed that alkali treated kenaf fiber composite achieved V0 fire retardancy grade. The major weight losses, 86 % and 75.5 % for untreated and treated composites respectively were recorded between 300 °C and 450 °C. 13.6 % increase in HDT was noted for treated composite with 0.25 mm deflection at 0.45 MPa pressure condition. Thus the composite laminate with 6 % NaOH alkali-treated kenaf fiber achieved the best thermal stability with less degradation which is more suitable for automobile and aerospace applications.
Acknowledgments
The authors are grateful to VIT Chennai for providing the seed fund and fully operational laboratory for carrying out the experiments.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Competing interests: The authors declare no conflicting financial/personal interest regarding this article.
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Research funding: No funding declared.
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© 2023 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Material Properties
- Effect of super critical carbon dioxide and alkali treatment on oxygen barrier properties of thermoplastic starch/poly(vinyl alcohol) films
- Promoting antibacterial activity of polyurethane blend films by regulating surface-enrichment of SiO2 bactericidal agent
- Improving anti-aging performance of terminal blend rubberized bitumen by using graft activated crumb rubber
- An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites
- Preparation and properties of ABS/BNNS composites with high thermal conductivity for FDM
- Development of a high-strength carrageenan fiber with a small amount of aluminum ions pre-crosslinked in spinning solution
- Development and characterization of new formulation of biodegradable emulsified film based on polysaccharides blend and microcrystalline wax
- Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device
- Engineering and Processing
- Numerical simulation on the mixing behavior of double-wave screw under speed sinusoidal pulsating enhancement induced by differential drive
- Numerical and experimental studies on the influence of gas pressure on particle size during gas-assisted extrusion of tubes with embedded antibacterial particles
Articles in the same Issue
- Frontmatter
- Material Properties
- Effect of super critical carbon dioxide and alkali treatment on oxygen barrier properties of thermoplastic starch/poly(vinyl alcohol) films
- Promoting antibacterial activity of polyurethane blend films by regulating surface-enrichment of SiO2 bactericidal agent
- Improving anti-aging performance of terminal blend rubberized bitumen by using graft activated crumb rubber
- An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites
- Preparation and properties of ABS/BNNS composites with high thermal conductivity for FDM
- Development of a high-strength carrageenan fiber with a small amount of aluminum ions pre-crosslinked in spinning solution
- Development and characterization of new formulation of biodegradable emulsified film based on polysaccharides blend and microcrystalline wax
- Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device
- Engineering and Processing
- Numerical simulation on the mixing behavior of double-wave screw under speed sinusoidal pulsating enhancement induced by differential drive
- Numerical and experimental studies on the influence of gas pressure on particle size during gas-assisted extrusion of tubes with embedded antibacterial particles
