Current work aims to evaluate the effect of incorporating Tamarindus indica L.seed powder (TISP) and hybridization of hemp and jute natural fibers upon the characteristics of polymer nano-composites by varying the content (in weight percentage) of both the natural fibers. TISP filled hemp fibers (HF) and jute fibers (JF) reinforced polymer composites were manufactured via compression molding technique and mechanical properties such as flexural strength and modulus, tensile strength and modulus, porosity, hardness, impact strength, and inter-laminar shear strength (ILSS) were determined for the hybrid composites. Composites were also characterized by water absorption, Fourier transform infrared spectroscopy, and scanning electron microscopy analysis. Experimental results showcased that the tensile strength and modulus of the composites are 39.52 MPa and 2.648 GPa and the flexural strength and modulus values are of 89.62 MPa and 9.24 GPa respectively. The impact strength and ILSS values were found to be 2.35 J and 3.62 MPa. Composites containing 40 wt% JF and 10 wt% HF showcased reduced amount of void content because of the appreciable compatibility existed between matrix and the fibers.

Nowadays researchers seeking attention on plant‐based natural fibers as reinforcement with the biodegradable matrix‐like polylactic acid (PLA) to solve the environmental issues. In this research work, jute and hemp fibers are reinforced with PLA matrix with the weight fraction of 50:50 and the composites are fabricated by using compression molding technique. The properties such as hardness, tensile strength, flexural strength, impact strength and inter‐laminar shear strength (ILSS), and water absorption characteristics are evaluated. The characterization of these composites are examined by using thermo‐gravimetry analysis, differential thermal analysis, differential thermo‐gravimetric, and scanning electron microscopy analysis. Experimental results show that the jute/hemp/PLA hybrid composites exhibit better tensile strength (69 MPa), flexural strength (145.40 MPa), impact strength (6.37 J), and ILSS (2.98 MPa) than other combinations. From the thermal analysis it is found that the decomposition and weight loss occurring started around 250°C and ended by 350°C. From the experimental analysis it is concluded that the hybrid composites performed well, indicating that they have a lot of potential for use as a green substitute material for synthetic or single plant fiber reinforced composites.

The aim of this investigation is to determine the physical, mechanical, water absorption behavior, and thermal properties of Tamarindus indica seed powder (TISP) incorporated Luffa cylindrica fruit (LCF) waste fiber reinforced epoxy composites. TISP of size 40–50 nm was mixed with matrix in various weight proportions (2.5, 5.0, 7.5, and 10 wt%), and the composite laminates were made using the manual stacking followed by compression molding technique. The developed composite samples were subjected to various testing which includes density, tensile, compression, flexural, impact, hardness, and water absorption behavior. Thermo‐gravimetric analysis (TGA) was also done to investigate the influence of TISP addition on the prepared sample to determine thermal stability. The results showed inclusion of 7.5 wt% TISP resulting better physico‐mechanical and thermal properties. A field emission scanning electron microscopy (FESEM) test was conducted for the investigation of the bonding nature at the fiber/matrix interface, fiber pull‐outs, voids, and internal cracks. From the results it is seen that the addition of TISP improve the performance of the developed LCF waste fiber reinforced epoxy composites. Further, these composites show better resistance to moisture, which could have implications in automobile and structural applications.

Natural fiber composite materials are competent materials that may replace conventional synthetic materials where the strength to weight ratio is essential. In this paper, the mechanical characteristics of composites made up of randomly oriented natural fibers (mudar fiber and snake grass fiber) with nano-silica filler are detailed for the first time. From the various literature surveys, the critical length of mudar and snake grass fiber is chosen as 40 mm and 30 mm, respectively. The test samples were prepared with a fiber content of 10%, 20%, 30%, and 40% with an equal amount of mudar and snake grass fiber. The percentage of nano-filler is maintained as constant as 3% with all the compositions. The composites showed that the highest mechanical properties were found at 30% fiber volume. The maximum tensile strength is 45 MPa, and the flexural strength is 51 MPa. The maximum impact strength is 4.5 J. Sample ID 3 provided the best results compared to other proportions. The fiber/matrix adhesion was investigated using a scanning electron microscope (SEM). These predominant mechanical properties make it easier for the implementation of the prepared composite material in structural and automotive applications.

The impact of SiO2 and B4C on mechanical and morphological studies of Sansevieria trifasciata fiber (STF) reinforced in polyester composites is investigated in this study. STF fibers are reinforced with polyester composites with the addition ceramic fillers such as SiO2 and B4C in various weight fractions to improve tensile, flexural, and impact characteristics. The morphological properties are studied with the help of scanning electron microscopy (SEM). The improved mechanical properties were tensile strength (44.92 MPa), flexural strength (103.58 MPa), and impact strength (27.4 kJ/m2) obtained for 20 wt.% STF fiber and 15 wt.% SiO2 reinforcement with the polyester matrix. The mechanical characteristics of the composites were significantly influenced by increasing SiO2 up to 15 wt.%.