ABSTRACT:The two layers of bilayered vegetable fabric from ridge gourd were analyzed by FTIR, chemical, X-ray, and thermogravimetric methods before and after alkali treatment. The morphology of the fabrics in the two layers, before and after alkali treatment, was also studied using SEM technique. The FTIR and chemical analyses indicated lowering of lignin and hemicellulose content by alkali treatment in the fabric of both layers. Further, the X-ray diffraction revealed increase in crystallinity of the fabric by alkali treatment. The thermal stability of the fabric was also found to increase by alkali treatment.
Ridge gourd/phenolic and glass/ridge gourd/phenolic hybrid composites were prepared using resol resin PF-108 as the matrix and the bilayered vegetable fabric ridge gourd as the reinforcement with and without alkali treatment and glass fabric as a co-reinforcement. The natural bilayer fabric of ridge gourd vegetable belonging to the Cucurbitaceae family was treated with 2% aqueous NaOH solution. The tensile strength, modulus and percent elongation values of untreated and alkali treated ridge gourd fabric reinforced resol type (PF-108) composites and glass, ridge gourd fabric reinforced resol type (PF-108) hybrid composites in the absence and presence of two coupling agents were also determined.
Ridge gourd/phenolic and ridge gourd/phenolic/glass hybrid composites were prepared using resol resin PF-108 as the matrix, the twin layered vegetable fabric ridge gourd (without and with alkali treatment) as the reinforcement and glass fabric as a co-reinforcement. The compressive strength, the modulus of untreated and alkali treated ridge gourd fabric reinforced phenolic composites and the ridge gourd and glass fabric reinforced phenolic hybrid composites in the absence and presence of two coupling agents were also determined. The interfacial bonding between the components of these composites was examined by scanning electron microscopy.
Ridge gourd/phenolic and glass/ridge gourd/phenolic hybrid composites were prepared using resol resin PF-108 as the matrix and the bilayered vegetable fabric ridge gourd as the reinforcement without and with alkali treatment and glass fabric as a co-reinforcement. The natural bilayer fabric of ridge gourd vegetable belonging to the Cucurbitaceae family was treated with 2% aqueous NaOH solution. The flexural strength and modulus of untreated and alkali treated ridge gourd fabric reinforced resol type (PF-108) composites and glass, ridge gourd fabric reinforced resol type (PF-108) hybrid composites in the absence and presence of two coupling agents were also determined.
The natural bilayer fabric of ridge gourd vegetable belonging to the Cucurbitaceae family is treated with 2% aqueous NaOH solution. The primary thermograms of the fibers from this natural fabric of both the layers (top and bottom) before and after alkali treatment are recorded in an inert atmosphere at a heating rate of 10C/min. Using these thermograms, the initial and final degradation temperatures and inflection points are found. Employing the Doyle method, the integral procedural degradation temperature is also determined. The thermal stability of fabric for both layers is found to increase on alkali treatment.
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