The current era's remedies to global warming revolve around replacing fossil fuels with more ecologically friendly biodegradable materials in order to slow down the rate at which they are being depleted. Calotropis gigantea fruit bunch (CGFB) fiber is one kind of substitute material that this work envisage using in place of plastics in the construction of composite materials, as supported by the study literature. CGFB fiber was chosen for this project because it is extensively accessible in Bangladesh and has less value to vegetation. The CGFB fiber undergoes three different chemical pretreatments: sodium hydroxide (alkali treatment), hydrogen peroxide (peroxide treatment) and benzoyl chloride (benzoylation). Composites are made from chemically treated fibers, and the mechanical characteristics of these materials are investigated. Benzoylated composite offers better tensile, compressive, and impact strengths than any other composite. Compared to the untreated and benzoylated versions, it has been demonstrated that the benzoylation increased the composites' tensile strength by 98.3%, compressive strength by 61.4%, and impact strength by 97.7%. Compared to other composites, the one treated with hydrogen peroxide had the highest flexural strength. Following a hydrogen peroxide treatment, the flexural strength rose by 44.5%. Despite having a little lower flexural strength than the benzoylated composite, the composite's elongation capacity was enhanced throughout tension, flexure, and compression tests after being treated with hydrogen peroxide. When considering overall performance, benzoyl chloride seems to be the most efficient chemical treatment. There were not many flaws visible in the benzoylated composite's surface morphology.

1. Raja T, Devarajan Y. Mechanical and thermal stability of Millettia pinnata fibre-reinforced ZrO2 nanofiller particulates polyester composite-an experimental study. Biomass Conversion and Biorefinery. 2023:1-8. 2. Zaman HU, Khan RA. Preparation and Evaluation of Polypropylene-Peanut Shell Flour Eco-Friendly Composites with and without Cloisite 30B. International Journal of Advanced Science and Engineering. 2022;9:2658-2668. 3. Zaman HU, Khan RA. Surface modification of plant-drive calotropis gigantea fiber reinforced polypropylene composites. Progress in Applied Science and Technology. 2022;12:23-35. 4. Ramaswamy R, Gurupranes S, et al. Characterization of prickly pear short fiber and red onion peel biocarbon nanosheets toughened epoxy composites. Polymer Composites. 2022;43:4899-4908. 5. Zaman HU, Khan RA. Effect of Fiber Modification on Pineapple Leaf Fiber's Mechanical Properties and Interfacial Adhesion. International Journal of Advanced Science and Engineering. 2021;9:2818-2829. 6. Lyu G, Qiao J, et al. Dynamic mechanical behaviors of a metastable β-type bulk metallic glass composite. Journal of Alloys and Compounds. 2020;819:153040. 7. Salman SD. Effects of jute fibre content on the mechanical and dynamic mechanical properties of the composites in structural applications. Defence Technology. 2020;16:1098-1105. 8. Shanmugasundaram N, Rajendran I, et al. Characterization of untreated and alkali treated new cellulosic fiber from an Areca palm leaf stalk as potential reinforcement in polymer composites. Carbohydrate Polymers. 2018;195:566-575. 9. Prithivirajan R, Balasundar P, et al. Characterization of cellulosic fibers from Morus alba L. stem. Journal of Natural Fibers. 2019;16:503-511. 10. Kathirselvam M, Kumaravel A, et al. Characterization of cellulose fibers in Thespesia populnea barks: Influence of alkali treatment. Carbohydrate Polymers. 2019;217:178-189. 11. Ganapathy T, Sathiskumar R, et al. Characterization of raw and alkali treated new natural cellulosic fibres extracted from the aerial roots of banyan tree. International Journal of Biological Macromolecules. 2019;138:573-581. 12. Shyam Kumar R, Balasundar P, et al. A new natural cellulosic pigeon pea (Cajanus cajan) pod fiber characterization for bio-degradable polymeric composites. Journal of Natural Fibers. 2021;18:1285-1295. 13. Prithivirajan R, Narayanasamy P, et al. Characterization of Musa paradisiaca L. Cellulosic natural fibers from agro-discarded blossom petal waste. Journal of Natural Fibers. 2020;17: 1640-1653. 14. Binoj J, Raj RE, et al. Comprehensive characterization of industrially discarded fruit fiber, Tamarindus indica L. as a potential eco-friendly bio-reinforcement for polymer composite. Journal of Cleaner Production. 2017;142:1321-1331. 15. Supian MAF, Amin KNM, et al. Production of cellulose nanofiber (CNF) from empty fruit bunch (EFB) via mechanical method. Journal of Environmental Chemical Engineering. 2020;8:103024. 16. Devnani G, Sinha S. African teff straw as a potential reinforcement in polymer composites for light-weight applications: mechanical, thermal, physical, and chemical characterization before and after alkali treatment. Journal of Natural Fibers. 2020;17:1011-1025. 17. Balasundar P, Narayanasamy P, et al. Physico-chemical study of pistachio (Pistacia vera) nutshell particles as a bio-filler for eco-friendly composites. Materials Research Express. 2019;6:105339. 18. Dittenber DB, GangaRao HV. Critical review of recent publications on use of natural composites in infrastructure. Composites Part A: Applied Science and Manufacturing. 2012;43:1419-1429. 19. Kabir M, Wang H, et al. Chemical treatments on plant-based natural fibre reinforced polymer composites: An overview. Composites Part B: Engineering. 2012;43:2883-2892. 20. Vinayagamoorthy R, Rajeswari N. Mechanical performance studies on Vetiveria zizanioides/jute/glass fiber-reinforced hybrid polymeric composites. Journal of Reinforced Plastics and Composites. 2014;33:81-92. 21. Zaman HU, Khan RA. Fabrication and Surface Modified Non-woven Calotropis gigantea Fiber Mat Reinforced Polypropylene Composites by Film Stacking Method. Journal of Thin Films, Coating Science Technology and Application. 2022;9:1-11. 22. Haque MM-U, Maniruzzaman M, et al. Thermal and tensile mechanical behavior of polystyrene graft acetic anhydride-treated pulque fibers. Journal of Natural Fibers. 2016;13:125-136. 23. Sunija A, Ilango SS, et al. Thespesia populnea reinforced cashew nut husk tannin-based polyurethane composites. Journal of Natural Fibers. 2015;12:481-493. 24. Zaman HU, Khan RA, et al. The improvement of physicomechanical, flame retardant, and thermal properties of lignocellulosic material filled polymer composites. Journal of Thermoplastic Composite Materials. 2023;36:1034-1050. 25. Babu GD, Babu KS, et al. Tensile and wear behavior of calotropis gigentea fruit fiber reinforced polyester composites. Procedia Engineering. 2014;97:531-535. 26. Raji R, Elangomannan S, et al. Calotropis gigantea fiber- a biogenic reinforcement material for europium substituted hydroxyapatite/poly (3, 4-propylenedioxythiophene) matrix: a novel ternary composite for biomedical applications. ACS omega. 2022;7:6024-6034. 27. Velusamy K, Navaneethakrishnan P, et al. Experimental investigations to evaluate the mechanical properties and behavior of raw and Alkali Treated king’s crown (Calotropis Gigantea) fiber to be employed for fabricating fiber composite. Applied Mechanics and Materials. 2014;598:73-77. 28. Ramasamy R, Obi Reddy K, et al. Extraction and characterization of calotropis gigantea bast fibers as novel reinforcement for composites materials. Journal of Natural Fibers. 2018;15:527-538. 29. Zheng Y, Zhu Y, et al. Potential of Calotropis gigantea fiber as an absorbent for removal of oil from water. Industrial Crops and Products. 2016;83:387-390. 30. Tu L, Duan W, et al. Calotropis gigantea fiber derived carbon fiber enables fast and efficient absorption of oils and organic solvents. Separation and Purification Technology. 2018;192:30-35. 31. Sanjay M, Siengchin S, et al. A comprehensive review of techniques for natural fibers as reinforcement in composites: Preparation, processing and characterization. Carbohydrate Polymers. 2019;207:108-121. 32. Senthamaraikannan P, Kathiresan M. Characterization of raw and alkali treated new natural cellulosic fiber from Coccinia grandis. L. Carbohydrate Polymers. 2018;186:332-343. 33. Vijay R, Singaravelu DL, et al. Characterization of raw and alkali treated new natural cellulosic fibers from Tridax procumbens. International Journal of Biological Macromolecules. 2019;125:99-108. 34. Conrad CM. Determination of wax in cotton fiber a new alcohol extraction method. Industrial & Engineering Chemistry Analytical Edition. 1944;16:745-748. 35. Senthamaraikannan P, Saravanakumar S, et al. Physico-chemical and thermal properties of untreated and treated Acacia planifrons bark fibers for composite reinforcement. Materials Letters. 2019;240:221-224. 36. Madhu P, Sanjay M, et al. Characterization of cellulosic fibre from Phoenix pusilla leaves as potential reinforcement for polymeric composites. Journal of Materials Research and Technology. 2019;8:2597-2604. 37. Mohanty A, Misra M, et al. Surface modifications of natural fibers and performance of the resulting biocomposites: An overview. Composite Interfaces. 2001;8:313-343. 38. Kim JT, Netravali AN. Fabrication of advanced “green” composites using potassium hydroxide (KOH) treated liquid crystalline (LC) cellulose fibers. Journal of Materials Science. 2013;48:3950-3957. 39. Zaman HU, Khan RA. Preparation and Testing of Bast Fiber Reinforced Thermoplastic Composites under Chemical Treatment. International Journal of Advanced Science and Engineering. 2023;10: 3164-3177. 40. Idicula M, Joseph K, et al. Mechanical performance of short banana/sisal hybrid fiber reinforced polyester composites. Journal of Reinforced Plastics and Composites. 2010;29:12-29. 41. Sreekala M, Kumaran M, et al. Oil palm fibre reinforced phenol formaldehyde composites: influence of fibre surface modifications on the mechanical performance. Applied Composite Materials. 2000;7:295-329. 42. Zaman HU, Khan RA. Surface Modified Calotropis Gigantea Fiber Reinforced Polypropylene Composites. International Journal of Advanced Science and Engineering. 2022;9:2477-2487.