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Concern over the environment causes the construction industry to look forward to new alternative insulation material toward sustainable and green materials. Given that textiles are used as insulation material in the construction industry, the possibility of using recycled textiles is relevant. The objectives of this study are to investigate the sound absorption coefficient and thermal conductivity of the recycled cotton textile. Recycled cotton textiles were intermixed with corn starch as binder. Four samples are developed with various ratios of recycled textile and binder, and different cutting dimensions of recycled cotton are used. This study investigated the physical, sound, and thermal properties of the prepared sample. Water absorption and density test have been conducted to determine the physical properties, and the measurement of sound absorption coefficient (SAC) was done by using the Impedance Tube Method. Meanwhile, the thermal conductivity was measured using SOLTEQ® model HE110. Two samples with recycled textile and corn starch in a 1:1 ratio (Sample S4) and a 5:6 ratio (Sample S5) show the optimum result of the proportions. The densities for S4, S5, and gypsum are 555.77, 677.78, and 668 kg/m3. The result shows that S5 is 1.5% denser than gypsum panels. Water absorption test Samples S4, S5, and gypsum percentages are 105.8, 79.6, and 10%, respectively. For SAC at 500 Hz, the values for S4, S5, and gypsum are 0.3230, 0.4786, and 0.0500, where Sample S5 outperformed gypsum by 90% in SAC at low frequencies. The highest values obtained of SAC at high frequency (1000–8000 Hz) for S4 and S5 are 0.2035 and 0.235. Lastly, the thermal conductivities for S4, S5, and gypsum are 0.083, 0.087, and 0.3, respectively. Compared with gypsum, S5 performs 72% better. This study shows that S5 is classified as absorbing and suitable for low frequency and obtains better results in thermal conductivity compared to gypsum. However, to improve the result in WA, suitable material (plastic) can be considered to mix with this mixture.

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Development of Recycled Cotton with Corn Starch as Binder for Sound and Thermal Insulation Panel

  • 章节

  • 发表日期：

    2025年

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  • Tasnim Zakepeli,
  • Kamarul Aini Mohd Sari,
  • Fatimah Mohamed Yusop

摘要

Concern over the environment causes the construction industry to look forward to new alternative insulation material toward sustainable and green materials. Given that textiles are used as insulation material in the construction industry, the possibility of using recycled textiles is relevant. The objectives of this study are to investigate the sound absorption coefficient and thermal conductivity of the recycled cotton textile. Recycled cotton textiles were intermixed with corn starch as binder. Four samples are developed with various ratios of recycled textile and binder, and different cutting dimensions of recycled cotton are used. This study investigated the physical, sound, and thermal properties of the prepared sample. Water absorption and density test have been conducted to determine the physical properties, and the measurement of sound absorption coefficient (SAC) was done by using the Impedance Tube Method. Meanwhile, the thermal conductivity was measured using SOLTEQ® model HE110. Two samples with recycled textile and corn starch in a 1:1 ratio (Sample S4) and a 5:6 ratio (Sample S5) show the optimum result of the proportions. The densities for S4, S5, and gypsum are 555.77, 677.78, and 668 kg/m3. The result shows that S5 is 1.5% denser than gypsum panels. Water absorption test Samples S4, S5, and gypsum percentages are 105.8, 79.6, and 10%, respectively. For SAC at 500 Hz, the values for S4, S5, and gypsum are 0.3230, 0.4786, and 0.0500, where Sample S5 outperformed gypsum by 90% in SAC at low frequencies. The highest values obtained of SAC at high frequency (1000–8000 Hz) for S4 and S5 are 0.2035 and 0.235. Lastly, the thermal conductivities for S4, S5, and gypsum are 0.083, 0.087, and 0.3, respectively. Compared with gypsum, S5 performs 72% better. This study shows that S5 is classified as absorbing and suitable for low frequency and obtains better results in thermal conductivity compared to gypsum. However, to improve the result in WA, suitable material (plastic) can be considered to mix with this mixture.