Green Synthesis of Aluminium Oxide Nanoparticles and its Applications in Mechanical and Thermal Stability of Hybrid Natural Composites

J Braz. Soc. Mech. Sci. Eng.

2020

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In this research, chemically synthesized titanium oxide (TiO 2) nano-powder was utilized for upgrading mechanical and vibrational applications of pineapple, banana and sisal fibers. The substitution of TiO 2 upto 3% enhanced the tensile, impact and flexural strength of pineapple/sisal, sisal/banana and banana/pineapple hybrid combinations. Irregular dispersion of nano-filler at 4% degrades the mechanical stability of bio-composites. Pineapple and sisal hybrid combinations with 3% TiO 2 filler has the highest natural frequency due to excellent surface contact with resin/hybrid natural fibers and filter/ resin interface making higher stiffness to the composites with improved natural frequency. Natural frequency and damping properties enhanced with nano-filler mixing. The factors such as frictional properties and energy dissipation at maximum strain area in the filler make increment in the damping nature of the natural composites. In the equal fiber weight% of 35, pineapple-based hybrid composites make better damping rate by the higher interface thickness and smaller diameter of pineapple fiber than other two fibers.

Section: Composite Preparationmentioning

confidence: 99%

“…Filler powder was integrated with bio-composites from 1-4 wt%. The parameters such as NaOH treatment and length of fiber were fixed at 5% and 5 mm [8,10].…”

Section: Composite Preparationmentioning

confidence: 99%

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Effect of TiO2 nano-filler in mechanical and free vibration damping behavior of hybrid natural fiber composites

J Braz. Soc. Mech. Sci. Eng.

2020

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“…These bio fibers have the property to stick with water content, that will reduce the properties by lesser contact with the matrix resin. Effective surface treatments, filler substitution, hybridization of reinforcement fibers will provide good solution for the reduced properties [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Abrasive water jet machining of Sisal/Pineapple epoxy hybrid composites with the addition of various fly ash filler

2020

Mater. Res. Express

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This research was based on influence of various fly ash filler content in the machining properties of Pineapple (P)/Sisal (S) hybrid fiber reinforcement composites. Fly ash from bio waste materials of Bagasse (BGFA), Banana (BFA) and Coir (CFA) were used. High hardness nature of 3% BFA (22.73 HV) and 3% CFA (23.85 HV) reduces Material Removal Rate (MRR) and increases its surface roughness nature of the composites. Maximum MRR of 376.38 mm 3 min −1 was observed in 3% BGFA combinations with 250 MPa Water jet Pressure (WP), 1mm Standoff Distance (SOD) and 20 mm min −1 Traverse Speed (TS) as machining parameters. MRR of 353.64 and 352.76 mm 3 min −1 was found out with 1% CFA and 1% BFA combinations. Lower surface roughness of 6.39 μm, 6.71 μm and 6.75 μm was found in 3% BGFA, 1% CFA and 1% BFA based composites. Filler surface created a tight bonding with the matrix, which reduces the erosion of fiber particles at higher WP. Untreated fibers showed lesser machining properties due to low fiber/matrix bonding. SEM results showed reducing of cracks and matrix breakages by the substitution of filler powders.

“…23 Surface treatment using NaOH at 5% removes the wax layer and other dusts from the natural fibers and improves the compatibility of fiber with resin. 40 The mechanical results are tabulated in Table 3.…”

Section: Resultsmentioning

confidence: 99%

Machinability of hybrid natural fiber reinforced composites with cellulose micro filler incorporation

Journal of Composite Materials

Kavimani

2020

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In the current scenario, the applications of natural fibers are increasing enormously due to their biodegradability, low-density and better mechanical properties. This research explains the machining nature of pineapple (P) and flax (F) fibers by the incorporation of cellulose micro filler (CMF). These epoxy-based composites were manufactured using compression moulding. In the machining process using abrasive water jet machining (AWJM), lower kerf angle of 1.31° and surface roughness of 5.1 µm were observed in 30% PF/2% cellulose micro filler hybrid epoxy combination. Agglomeration at higher filler incorporation causes decrease in machinability of hybrid 30% PF. Pineapple and flax hybrid fibers with 30 and 35 wt % showed better machinability at 2 and 3% cellulose micro filler addition. Scanning electron microscopy analysis after machining process showed reduction in flush off and pullouts of fiber by improved compaction with the epoxy matrix due to filler addition.