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<p>Banana stem fibres were used to improve the lightweight of geopolymers as insulating composites. Biomass fibres, extracted from the wet banana stem, showed good alkaline compatibility with and adhesion to the metahalloysite-based geopolymer. The composites were investigated for thermal properties using the Hot Disk method, porosity using the Archimedes method, microstructure using the ESEM Quanta 200 and FEI apparatus and MIP using the Auto Pore software. The results showed that the composites were lightweight with a density of 1.4&#xa0;kg/m<sup>3</sup>, conductivity λ = 0, 3&#xa0;W/m·K for the specimens with &gt; 47%&#xa0;vol porosity and 217&#xa0;m<sup>2</sup>/g BET surface area. These insulation properties, hydroscopic characteristics and low density make these lightweight composites promising candidates for thermal comfort applications in buildings. These geopolymer fibres, “<i>Geopolymer Banana panels”,</i> have the advantage of having a long setting time, thus allowing manufacturing and favoring industrial production.</p>

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Banana fibre reinforced geopolymer matrices: pore structure, mesoscale and insulating properties

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Tatiane Marina ABO,
  • Herman Lekane Assonfack,
  • Joelle Nadia Nouping Fekoua,
  • Cyriaque Rodrigue Kaze,
  • Rachel Yanou Nkwaju,
  • Juvenal Giogetti Deutou Nemaleu,
  • Arnaud Maxime Yona Cheumani,
  • Elie Kamseu,
  • Maurice Kor Ndikontar

摘要

Banana stem fibres were used to improve the lightweight of geopolymers as insulating composites. Biomass fibres, extracted from the wet banana stem, showed good alkaline compatibility with and adhesion to the metahalloysite-based geopolymer. The composites were investigated for thermal properties using the Hot Disk method, porosity using the Archimedes method, microstructure using the ESEM Quanta 200 and FEI apparatus and MIP using the Auto Pore software. The results showed that the composites were lightweight with a density of 1.4 kg/m3, conductivity λ = 0, 3 W/m·K for the specimens with > 47% vol porosity and 217 m2/g BET surface area. These insulation properties, hydroscopic characteristics and low density make these lightweight composites promising candidates for thermal comfort applications in buildings. These geopolymer fibres, “Geopolymer Banana panels”, have the advantage of having a long setting time, thus allowing manufacturing and favoring industrial production.