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<p>The main objective of the research is to fabricate and investigate hybrid vinyl ester composites reinforced with silane treated flax fibers and Caesalpinia bonducella seed shell powder, with a focus on understanding their behaviour and performance. This study explores the mechanical and drilling behavior of vinyl ester composites reinforced with silane-treated flax fiber and 1&#xa0;μm Caesalpinia bonducella seed shell powder (CBSSP) under humidity aging. 2 wt% of silane coupling agent, 3-aminopropyltrimethoxysilane (3-APTMS) enhanced interfacial adhesion, and methyl ethyl ketone peroxide was used for accelerated curing. This research analysed specimens with five different compositions including pure matrix, 40 vol% fiber and 1, 3 and 5 vol% filler reinforced composites designated as, R, RF0, RF1, RF2 and RF3.The RF2 composite, which is composed of 40 vol% flax fiber and 3 vol% CBSSP, has been found to have excellent mechanical properties. This composite has a shore-D hardness of 82, an impact strength of 6.1&#xa0;J and a high tensile strength of 131&#xa0;MPa. Its other impressive strengths include a flexural strength of 154&#xa0;MPa, a compression strength of 141&#xa0;MPa and an interlaminar shear strength (ILSS) of 33&#xa0;MPa. It also demonstrates a rail shear of 19.6&#xa0;MPa and lap shear of 23.2&#xa0;MPa. SEM analysis revealed uniform filler distribution and reduced defects, confirming that surface modification prevented fiber pull-out and void formation. These findings demonstrate that silane-treated flax fiber and CBSSP can significantly improve the performance and longevity of biofiller-reinforced composites for diverse applications.</p>

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Mechanical, drilling and shear performance analysis of surface altered flax fiber with Caesalpinia Bonducella Seed-Shell powder reinforced vinyl ester composites

  • 期刊论文

  • 发表日期：

    2025年12月15日

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  • E. Raja Sherin,
  • S. Sheeju Selva Roji,
  • T. R. Kannan

摘要

The main objective of the research is to fabricate and investigate hybrid vinyl ester composites reinforced with silane treated flax fibers and Caesalpinia bonducella seed shell powder, with a focus on understanding their behaviour and performance. This study explores the mechanical and drilling behavior of vinyl ester composites reinforced with silane-treated flax fiber and 1 μm Caesalpinia bonducella seed shell powder (CBSSP) under humidity aging. 2 wt% of silane coupling agent, 3-aminopropyltrimethoxysilane (3-APTMS) enhanced interfacial adhesion, and methyl ethyl ketone peroxide was used for accelerated curing. This research analysed specimens with five different compositions including pure matrix, 40 vol% fiber and 1, 3 and 5 vol% filler reinforced composites designated as, R, RF0, RF1, RF2 and RF3.The RF2 composite, which is composed of 40 vol% flax fiber and 3 vol% CBSSP, has been found to have excellent mechanical properties. This composite has a shore-D hardness of 82, an impact strength of 6.1 J and a high tensile strength of 131 MPa. Its other impressive strengths include a flexural strength of 154 MPa, a compression strength of 141 MPa and an interlaminar shear strength (ILSS) of 33 MPa. It also demonstrates a rail shear of 19.6 MPa and lap shear of 23.2 MPa. SEM analysis revealed uniform filler distribution and reduced defects, confirming that surface modification prevented fiber pull-out and void formation. These findings demonstrate that silane-treated flax fiber and CBSSP can significantly improve the performance and longevity of biofiller-reinforced composites for diverse applications.