The primary purpose of this study is to realize quantitative fiber loading effects on free vibration, damping behavior, fracture toughness, thermal conductivity, inter-laminar shear strength, and flammability of jute-banana fiber phenolformaldehyde (PF) hybrid composites. These composites were manufactured with fiber weight percentages ranging from 30% to 60% using hot press technique. Hybrid composite with equal amount of fiber and resin (PJB-2) had a higher natural frequency in the range of 4.8%-59%, a higher inter-laminar shear strength varying from 30% to 54%, a higher fracture toughness with minimum of 19 to maximum of 44%, and a low damping factor in the range of 25%-59% to that of other composite having unequal amount of fiber and resin loading. In contrast to other composites, the composite containing 30 wt% fiber (PJB-4) has a high heat conductivity of about 10%-20%. However, the thermal conductivity of jute-banana fiber PF composites declined as the fiber content increased beyond 30 wt%, while the flame resistance was improved as the resin concentration increased. Additionally, Scanning electron microscopy (SEM) studies clearly indicates the failure patterns of fiber matrix interface under Inter laminar shear strength and fracture toughness tests were supports to justify the experimental results.

In recent days the use of Natural fiber-reinforced composites in all sorts of consumer goods. A wide variety of technologies necessitate the use of materials with unusual property combinations, such as high strength-to-weight and stiffness ratios. Traditional metal alloys fall short of these quality standards, which has led to a significant increase in the applications of natural fibers. Hence, an effort has been made to investigate the effect of fillers like Coconut shell (CS), Saw dust (SD), Kolam (KP), and Fly ash powder (FA) on the mechanical and wear properties of Epoxy reinforced hybrid Sisal, Banana, and Pineapple fiber composites in this work. The Natural fibers weight percent was taken around 45wt%, with the same quantity of epoxy blended with 10wt% Naturally available fillers. The findings revealed that the CS fillers in the composite have a more positive influence on tensile strength and modulus than the composite with other fillers which are used in this study. SEM analysis of tensile-fractured CS specimens also reveals an improved fiber-matrix bonding. Similarly, the CS-filled composite also exhibits better flexural strength, modulus, and Impact strength maximum of up to 18% higher than the BS, SD, KP, and FA-filled Hybrid composites. Further, CS-filled composite has reduced weight loss against wear and friction due to higher lignin content.

Natural-based composites are gaining popularity among composite makers and end users because of their biocompatibility, low cost, and abundance. The influence of Glycerin as a plasticizer in various percentages ranging from 3% to 12% on Tensile, Flexural, Impact, Inter-laminar Shear Strength (ILSS), and Hardness characteristics of a Kenaf-Jute hybrid polyester composite, which is fabricated using hand layup followed by the hot press method, was investigated in the present study. It was observed that a 6% Glycerin concentration in polyester Kenaf-Jute composite outperformed other composites in Tensile, Flexural, and Impact strengths in the range of 2 to 73%. This is evident by analyzing SEM images that better physical bonding between the Kenaf-Jute fibers with modified polyester resin using Glycerin. As the Glycerin content in the composite increases, the Hardness decreases when compared to without modified polyester.