Fatigue, fracture toughness and dynamic mechanical behaviour of CTBN rubber toughened silane surface-modified pineapple fiber and micro B4C-reinforced epoxy hybrid composites.

Autor: Jaiganesh, V., Vinothkumar, M., P., Gurusamy
Zdroj: Biomass Conversion & Biorefinery; Apr2024, Vol. 14 Issue 8, p9739-9748, 10p
Abstrakt: The present work investigates the fatigue, fracture toughness, and dynamic mechanical analysis of carboxyl-terminated acrylonitrile butadiene (CTBN) rubber-toughened epoxy composites reinforced with surface-modified pineapple fiber and micro boron carbide (B4C). This research aims to determine the effects of the inclusion of CTBN and surface modification on pineapple fiber and B4Cto form a composite with the epoxy matrix. A surface treatment with an amino silane (3-Aminopropyl) trimethoxysilane (APTMS) on natural fibers and filler microparticles is performed. The silanization was carried out in an aqueous solution. The natural fiber epoxy composites were fabricated using the hand lay-up technique and further characterization was performed. According to the results, CTBN rubber up to 3 vol. % shows enchantment in fatigue life cycles by 97% for composite designation N3(Fiber + CTBN). The DMA properties of the composites are enhanced after being reinforced with the treated pineapple fiber reinforcement. The glass transition temperature was found to be increased up to 86 °C for the N4 (Fiber + CTBN + B4C) composite designation; it is nearly 32% improvement. Likewise, the N4composite classification indicates a fracture toughness of 32.2 MPa and an energy release rate of 1.224 MJ/m2. The fractography images revealed better microparticle interfacial bonding in the matrix material. These composites with great fatigue life counts, dynamic mechanical behaviour and good resistance to fracture were highly demanded for mini-aircraft, hybrid vehicle, and structural applications. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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