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<p>This study examines how silane-modified biosilica particles and silane-treated Chamaesyce hirta microfiber affect the mechanical robustness, fire resistance, and thermal stability of vinyl ester composites. Thermogravimetric, fatigue, creep, and flammability tests were used to evaluate hybrid composites with 40 vol. % modified microfiber and various biosilica contents (0–6). Due to better stress transfer and efficient crack-bridging, the composite containing 4 vol.% biosilica (VFF2) had the highest fatigue life of 15,684, 12,973, and 9842 cycles at 25%, 50%, and 75% UTS, respectively. Fatigue performance improved dramatically with reinforcement of fiber and filler. VFF2 exhibited the least amount of deformation (1.68% at 15,000&#xa0;s), which is over 46% less than that of the plain resin (3.11%). Creep resistance also followed the same pattern. As a result of compact char formation and enhanced thermal shielding, VFF2 achieved a superior V-0 rating, reducing the flame propagation speed from 15.7&#xa0;mm/min (plain vinyl ester resin) to 9.6&#xa0;mm/min. Maximum Tonset, Tmax, and residual char were recorded at 6 vol.% biosilica, according to thermogravimetric analysis, which showed a gradual improvement in thermal stability. Overall, 4 vol.% surface-modified biosilica offered the optimum combination of fire resistance, thermal stability, and mechanical performance, proving that controlled hybrid reinforcement works well for creating high-performance bio-based composites. These composites can be utilized in lightweight structural panels, automotive interior components, and flame-retardant building materials.</p>

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Characterization of vinyl ester Biocomposites reinforced with teff straw-derived biosilica and chamaesyce hirta stem microfiber for enhanced fatigue, creep, flammability, and thermal stability performance

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • J. Allwyn Kingsly Gladston,
  • S. Sundararajan,
  • R. Santhana Krishnan,
  • Naveen Subbaiyan

摘要

This study examines how silane-modified biosilica particles and silane-treated Chamaesyce hirta microfiber affect the mechanical robustness, fire resistance, and thermal stability of vinyl ester composites. Thermogravimetric, fatigue, creep, and flammability tests were used to evaluate hybrid composites with 40 vol. % modified microfiber and various biosilica contents (0–6). Due to better stress transfer and efficient crack-bridging, the composite containing 4 vol.% biosilica (VFF2) had the highest fatigue life of 15,684, 12,973, and 9842 cycles at 25%, 50%, and 75% UTS, respectively. Fatigue performance improved dramatically with reinforcement of fiber and filler. VFF2 exhibited the least amount of deformation (1.68% at 15,000 s), which is over 46% less than that of the plain resin (3.11%). Creep resistance also followed the same pattern. As a result of compact char formation and enhanced thermal shielding, VFF2 achieved a superior V-0 rating, reducing the flame propagation speed from 15.7 mm/min (plain vinyl ester resin) to 9.6 mm/min. Maximum Tonset, Tmax, and residual char were recorded at 6 vol.% biosilica, according to thermogravimetric analysis, which showed a gradual improvement in thermal stability. Overall, 4 vol.% surface-modified biosilica offered the optimum combination of fire resistance, thermal stability, and mechanical performance, proving that controlled hybrid reinforcement works well for creating high-performance bio-based composites. These composites can be utilized in lightweight structural panels, automotive interior components, and flame-retardant building materials.