Synthesis and Characterization of Coir and Luffa Cylindrica filled with CaCO3 hybrid composites

In the present era, usage of natural fiber hybrid composites has gained decent interest throughout the world. The main driving force for using of this natural fiber composites includes the light weight, eco friendly, biodegradability, strength to weight ratio, high specific modulus etc [1-3]. Moreover, the costs for manufacturing of these composites are also less when compared with the synthetic fiber composites These are the major reasons to consider this material in the field of structural, automobile, construction and engineering applications Natural fibers as reinforcements along with matrix for the preparation of composites; in addition to that, the inclusion of filler material into the matrix improves the properties of the composites. To attain better properties, the surface of the fibers is chemically treated in order to remove the hydrophilic nature of the fibers The chemical treatment (NaoH) influences not only the cellulosic components inside the plant fiber but also the non-cellulosic components (hemi-cellulose, lignin, and pectin). An enormous amount of work has been conducted in terms of mechanical properties, characterization and fiber modification Cao et al. [12] investigated and compared the mechanical properties of bagasse fiber-reinforced polyester composites with and without alkali treatment and concluded that there is an improvement of 13% in tensile strength, 14% in flexural strength, and 30% in impact resistance, respectively, due to surface modification by alkaline treatment. From the thermo-gravimetric analysis it was observed that there is a slight decrease in thermal stability due to alkali treatment. Not only alkali treatment improves the mechanical properties but also