Synthesis and characterization of cost-effective industrial discarded natural ceramic particulates from Cymbopogon flexuosus plant shoot for potential polymer/metal matrix reinforcement

作者: Divya Divakaran ; Indran Suyambulingam ; Raja Soma Sundaram Pillai ; Isaac Rajamony Suthies Goldy ; Rajesh Rajamoni

Use of agricultural waste for biocomposite is one of the main concerns of researchers because the waste is an abundant, economic, and eco-friendly source.Agro wastes of Cymbopogon flexuosus plant shoot (CFPS) from an oil extraction industry was analyzed for its feasibility as reinforcement in a metal matrix composite and as a lignocellulosic filler in a polymer matrix composite.In this study, non-carbonized and carbonized CFPS wastes were characterized by using a combination of spectroscopic and chem. techniques.The carbonized CFPS is rich in SiO₂ along with other traces of hard ceramic particles as authenticated by X-ray fluorescence, X-ray diffraction, and Energy Dispersive X-Ray Spectroscopy.The presence of siloxane and silanol elemental groups was also confirmed by Fourier transform IR spectroscopy data.Similarly, Fourier transform IR and the X-ray diffraction spectroscopy anal. on powd. non-carbonized CFPS waste confirmed the semi-crystalline nature of the CFPS with a higher crystallinity index.Moreover, the non-carbonized CFPS had a rough surface, as confirmed by at. force microscope and scanning electron microscope analyses.Hence, the exptl. data highlighted the feasibility of the CFPS waste as filler and a substitute for silica-based inorganic fillers/reinforcement for composites in enhancing its properties.

2022-09-02·Journal of Natural Fibers

Mechanical and Thermal Properties of Chloris barbata flower fiber /Epoxy Composites: Effect of Alkali treatment and Fiber weight fraction

作者: Indran, S. ; Asiri, Abdullah M. ; Divya, D. ; Nagarajan, S. ; Khan, Anish ; Muthu chozha rajan, B. ; Narayanasamy, P.

Untreated and alkali-treated (5% NaOH) Chloris barbata flower fibers (CBFFs) were used to fabricate the composites by hand lay-up method.Novel composite plates were manufactured by changing fiber weight fraction (5 weight%, 10 weight%, 15 weight%, 20 weight%, and 25 weight%), raw and 5% NaOH treated fibers.The impact of NaOH treatment and fiber weight, fraction on tensile, flexural, impact, morphol. and thermal properties of CBFF reinforced epoxy composites were examined and reported for the first time in this article.The tensile, flexural, and impact properties of the composites were increased up to 20 weight % fiber addition and after that dropped.After the tensile testing, broken cross-sections of the composites were analyzed by SEM, which showed that NaOH treated CBFF reinforced composite has better interfacial bonding and lesser voids.Thermogravimetric anal. (TGA), Fourier transform IR anal. (FTIR), and Atomic force microscope (AFM) anal. of composites also pointed out that alkali-treated CBFF is a suitable material for reinforcement with the epoxy polymer matrix.

2022-09-02·Journal of Natural Fibers

A New Study on Tribological Performance of Cissus Quadrangularis Stem Fiber/Epoxy with Red Mud Filler Composite

作者: Divya, D. ; Kumaravelan, R. ; Raj, R. Edwin ; Jenish, I. ; Indran, S. ; Basavarajappa, S. ; Gandhi, V. C. Sathish

Dry sliding friction and wear behavior, hardness, and thermogravimetric anal. (TGA) of Cissus quadrangularis stem fiber (CQSF)/epoxy resin composite, reinforced with red mud particulate filler were done.The hardness of the material increased by adding red mud filler.Thermogravimetric anal. (TGA) reveals that the maximum char yield obtained at 10 weight% red mud particulate-filled with CQSF/epoxy composite.The optimization of dry sliding friction and wear behavior was done by response surface methodol. (RSM) based on pin-on-disk wear test to determine the specific wear rate (SWR) and coefficient of friction (COF) of the materials.The exptl. design was created with four input parameters at three different levels using full factorial central composite design (CCD).The min. SWR was achieved at 5.93 weight% red mud addition irresp. of other parameters, was obtained by RSM optimization technique.The SEM images of the worn out surfaces substantiate the optimized results of wear properties.

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