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<p>Development of natural material-reinforced composite material is increased and many researchers are being done on this field. Because of their light weight, corrosive resistant, better strength features, the present study develops a composite using bamboo fiber and waste cassava sheath tuber-derived biosilica-reinforced polyester matrix. The extraction from cassava waste and reinforcement high strength to weight ratio properties of bamboo fiber provides a unique and novelty to this study. As per American Society for testing and materials (ASTM), the prepared composite performance is assessed. The fatigue test results revealed that specimen A4 (40 vol% bamboo fiber, 3 vol% biosilica) exhibited the highest fatigue strength, with values of 24,711&#xa0;MPa at 25% ultimate tensile strength (UTS), 21,711&#xa0;MPa at 50% UTS and 18,741&#xa0;MPa at 75% UTS, and this shows bonding adhesion and better load withstanding capacity of the composite. Further, with the increase in filler of 5 vol%, 40 vol% fiber in A5 composite shows superior creep resistance, flame retardancy and drilling performance. The creep strain values for A5 were the lowest at 0.0059 at 5000&#xa0;s, 0.0068 at 10000&#xa0;s and 0.0084 at 15000&#xa0;s, indicating its enhanced resistance to time-dependent deformation due to higher biosilica content. According to the flammability test, A5's enhanced fire resistance was confirmed by its UL-94&#xa0;V-0 rating and minimal flame spread speed of 5.63&#xa0;mm/min. A5 showed the least amount of drilling resistance in the drilling test, recording 4.06&#xa0;mm across the 4-mm drilling and 8.05&#xa0;mm over the 8-mm drilling, indicating improved machinability. Further examination using scanning electron microscopy (SEM) indicated that A1 had resin matrix gaps, A2 had smooth fiber surfaces, A4 had high filler–matrix adhesion, and A5 had agglomerated filler particles, all of which affected mechanical performance. The drilling test's damage analysis verified that A4 had the best hole quality; however, A5's brittle nature caused material breaking.</p>

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Fatigue, creep, flammability and machining studies on eco-friendly polyester biocomposites using bamboo fiber and waste cassava sheath biosilica

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • M. Vinoth Kumar,
  • Mathi Kannaiyan,
  • Mathanbabu Mariappan,
  • R. Ashok Raj

摘要

Development of natural material-reinforced composite material is increased and many researchers are being done on this field. Because of their light weight, corrosive resistant, better strength features, the present study develops a composite using bamboo fiber and waste cassava sheath tuber-derived biosilica-reinforced polyester matrix. The extraction from cassava waste and reinforcement high strength to weight ratio properties of bamboo fiber provides a unique and novelty to this study. As per American Society for testing and materials (ASTM), the prepared composite performance is assessed. The fatigue test results revealed that specimen A4 (40 vol% bamboo fiber, 3 vol% biosilica) exhibited the highest fatigue strength, with values of 24,711 MPa at 25% ultimate tensile strength (UTS), 21,711 MPa at 50% UTS and 18,741 MPa at 75% UTS, and this shows bonding adhesion and better load withstanding capacity of the composite. Further, with the increase in filler of 5 vol%, 40 vol% fiber in A5 composite shows superior creep resistance, flame retardancy and drilling performance. The creep strain values for A5 were the lowest at 0.0059 at 5000 s, 0.0068 at 10000 s and 0.0084 at 15000 s, indicating its enhanced resistance to time-dependent deformation due to higher biosilica content. According to the flammability test, A5's enhanced fire resistance was confirmed by its UL-94 V-0 rating and minimal flame spread speed of 5.63 mm/min. A5 showed the least amount of drilling resistance in the drilling test, recording 4.06 mm across the 4-mm drilling and 8.05 mm over the 8-mm drilling, indicating improved machinability. Further examination using scanning electron microscopy (SEM) indicated that A1 had resin matrix gaps, A2 had smooth fiber surfaces, A4 had high filler–matrix adhesion, and A5 had agglomerated filler particles, all of which affected mechanical performance. The drilling test's damage analysis verified that A4 had the best hole quality; however, A5's brittle nature caused material breaking.