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<p>Electromagnetic interference (EMI) from nearby electronic devices is a major cause of malfunction in sensitive electronic equipment, driving the need for multifunctional materials that combine EMI shielding with superior hydrophobic and mechanical properties. Thus, the mechanical, hydrophobic, and EMI shielding qualities of the composite are examined in this study. Triethylenetetramine, a compound that acts as a curing agent, is used to harden the composite after it is created using epoxy resin as a matrix. Nutmeg short fiber was added as reinforcement after the biocarbon was produced from the plum peel by pyrolysis at 700 degrees Celsius, producing particles with a size range of 1–3&#xa0;µm. Out of all the testing specimens, ENB2 has the highest mechanical parameters, with increases of 148%, 112%, and 983% above specimen E, including tensile strength of 151&#xa0;MPa, flexural strength of 172&#xa0;MPa, and impact energy of 6.5&#xa0;J. These results have been verified by the SEM analysis, which shows that ENB2 has a well-dispersed structure that contributes to its exceptional mechanical properties. On the other hand, ENB3 exhibits agglomeration that affects mechanical performance but improves properties related to dielectric constant, reaching 4 in the X-band and 3.8 in the Ku-band. Other notable properties include EMI shielding effectiveness of 50&#xa0;dB in the X-band and 65&#xa0;dB in the Ku-band, lowest water contact angle of 68°, and thermal conductivity of 0.61 W/mK. This study demonstrates that incorporating natural fibers and fillers to composites could improve their performance and promote environmental sustainability.</p>

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Electromagnetic interference shielding, mechanical, and hydrophobic properties of plum peel biocarbon and nutmeg short fiber-reinforced epoxy composite: synthesis & characterization

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • N. Suresh,
  • P. Sivakumar,
  • J. B. Veera Malini,
  • M. Prabhu

摘要

Electromagnetic interference (EMI) from nearby electronic devices is a major cause of malfunction in sensitive electronic equipment, driving the need for multifunctional materials that combine EMI shielding with superior hydrophobic and mechanical properties. Thus, the mechanical, hydrophobic, and EMI shielding qualities of the composite are examined in this study. Triethylenetetramine, a compound that acts as a curing agent, is used to harden the composite after it is created using epoxy resin as a matrix. Nutmeg short fiber was added as reinforcement after the biocarbon was produced from the plum peel by pyrolysis at 700 degrees Celsius, producing particles with a size range of 1–3 µm. Out of all the testing specimens, ENB2 has the highest mechanical parameters, with increases of 148%, 112%, and 983% above specimen E, including tensile strength of 151 MPa, flexural strength of 172 MPa, and impact energy of 6.5 J. These results have been verified by the SEM analysis, which shows that ENB2 has a well-dispersed structure that contributes to its exceptional mechanical properties. On the other hand, ENB3 exhibits agglomeration that affects mechanical performance but improves properties related to dielectric constant, reaching 4 in the X-band and 3.8 in the Ku-band. Other notable properties include EMI shielding effectiveness of 50 dB in the X-band and 65 dB in the Ku-band, lowest water contact angle of 68°, and thermal conductivity of 0.61 W/mK. This study demonstrates that incorporating natural fibers and fillers to composites could improve their performance and promote environmental sustainability.