Increasing material innovation toward reduce the usage of heavy metals, which are increased consumption of fossil fuel, and exploitation of fossil reserves. As a result of this the bio composite light weight material is now gets researched by scientist across various domain of application. The primary aim of the research is to investigate the mechanical, fatigue, water absorption and flammability behaviour of the hybrid pineapple/basalt fiber with heat treated rice husk ash Si3N4composite. PBS1 (polyester, 40 vol.%basalt/pineapple fiber, 1 vol% silicon nitride Si3N4) and PPS1 (polyester, 40 vol% pineapple/basalt fiber, 1 vol% silicon nitride)had the highest mechanical properties of among all the tested specimens, including tensile strengths of 147.8 MPa, 132 MPa, flexural strengths of 190 MPa, 197 MPa, impact strengths of 5.45 J, 4.8 J, and fatigue life counts of 13,428 and 16,860 cycles. This increased results from the distribution of stress, which prevents cracks from spreading and lessens Si3N4deformation by enhancing structural integrity overall. Due to the strong link between the natural fibers and matrix, as well as the high cellulose content that improves adhesion and overall stiffness of the composite. However, the composite specimen PBS2 and PPS2 with 40 vol% fiber and 3 vol% Si3N4demonstrated respectively, high hardness, and water absorption of 81 shore-D, 84 shore-D, 0.241%, and 0.34%. Also Si3N4absorbs more water due to its porous nature, and its ceramic properties increase its hardness. Furthermore, the composite specimen, PBS2 shows reduced flame propagation speed of 8.1 mm/min, which represents reduced flammability by preventing combustion and forming a heat-resistant barrier.The composites that showed the best in-vitro performance were PBS2 (basalt fiber + 3 vol% Si3N4) and PPS2 (pineapple fiber + 3 vol.%Si3N₄). Following four weeks of immersion in SBF, PBS2 had the lowest swelling rate of 2.1% and PPS2 the lowest degradation rate of 0.55%. The most biocompatible systems were found to be PBS2 and PPS2, and these results show that silane-treated Si3N4 fillers effectively improve chemical stability and bioactivity. These hybrid biocomposites with improved properties could be utilised in the automotive, human prosthetic, biomedical and packaging sectors.

Influence of rice husk ash extracted heat treated Si3N4 ceramic on mechanical, wear and low cycle fatigue behaviour of hybrid pineapple/basalt fiber reinforced polyester composite

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发表日期：

2025年11月10日

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J. Jesumanen,
M. Chandrasekaran,
P. BabuAurtherson,
M. Arul Murugan

摘要

Increasing material innovation toward reduce the usage of heavy metals, which are increased consumption of fossil fuel, and exploitation of fossil reserves. As a result of this the bio composite light weight material is now gets researched by scientist across various domain of application. The primary aim of the research is to investigate the mechanical, fatigue, water absorption and flammability behaviour of the hybrid pineapple/basalt fiber with heat treated rice husk ash Si₃N₄composite. PBS1 (polyester, 40 vol.%basalt/pineapple fiber, 1 vol% silicon nitride Si₃N₄) and PPS1 (polyester, 40 vol% pineapple/basalt fiber, 1 vol% silicon nitride)had the highest mechanical properties of among all the tested specimens, including tensile strengths of 147.8 MPa, 132 MPa, flexural strengths of 190 MPa, 197 MPa, impact strengths of 5.45 J, 4.8 J, and fatigue life counts of 13,428 and 16,860 cycles. This increased results from the distribution of stress, which prevents cracks from spreading and lessens Si₃N₄deformation by enhancing structural integrity overall. Due to the strong link between the natural fibers and matrix, as well as the high cellulose content that improves adhesion and overall stiffness of the composite. However, the composite specimen PBS2 and PPS2 with 40 vol% fiber and 3 vol% Si₃N₄demonstrated respectively, high hardness, and water absorption of 81 shore-D, 84 shore-D, 0.241%, and 0.34%. Also Si₃N₄absorbs more water due to its porous nature, and its ceramic properties increase its hardness. Furthermore, the composite specimen, PBS2 shows reduced flame propagation speed of 8.1 mm/min, which represents reduced flammability by preventing combustion and forming a heat-resistant barrier.The composites that showed the best in-vitro performance were PBS2 (basalt fiber + 3 vol% Si₃N₄) and PPS2 (pineapple fiber + 3 vol.%Si₃N₄). Following four weeks of immersion in SBF, PBS2 had the lowest swelling rate of 2.1% and PPS2 the lowest degradation rate of 0.55%. The most biocompatible systems were found to be PBS2 and PPS2, and these results show that silane-treated Si₃N₄ fillers effectively improve chemical stability and bioactivity. These hybrid biocomposites with improved properties could be utilised in the automotive, human prosthetic, biomedical and packaging sectors.