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<p>Noise pollution has become a significant environmental issue that negatively impacts human health and quality of life. Consequently, the development of sound-absorbing materials for effective noise control has garnered considerable attention. In this study, grain husk/polyurethane (GH/PU) composites were synthesized using a one-step chemical foaming method. Further, the effect of GH addition on their acoustic properties was investigated from a microscopic perspective. An orthogonal test method was then employed to determine the optimal composition of GH/PU (evaluated by the average sound absorption coefficient in 50-6300&#xa0;Hz), which reached a maximum average value of 0.735. Simultaneously, the mechanical properties and damping properties of GH/PU were characterized: The maximum compression strength and tensile strength are 2.31&#xa0;kPa and 232&#xa0;kPa, and the damping loss factor reached a maximum of 0.712 at 10% GH content. Range analysis revealed that the GH addition amount, GH particle size, and foaming agent addition amount were the primary factors influencing the sound absorption performance. Next, a regression model (<i>R</i><sup>2</sup> = 0.8801) was established to assess the impact of these factors on the acoustic properties. Finally, single-factor tests were conducted on the primary control factors to comprehensively examine the potential influence of each factor on the sound absorption performance of GH/PU composites. Overall, the findings of this study offer valuable insights into optimizing the performance of composite acoustic materials and present a novel approach for the effective utilization of agricultural waste.</p>

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Development and Performance Testing of Grain Husk/Polyurethane Foam Composite Materials for Noise Reduction

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • Weimin Yang,
  • Linkun Jin,
  • Chuan Wang,
  • Meixia Wang,
  • Chuanyi Ma,
  • Xiankai Ma

摘要

Noise pollution has become a significant environmental issue that negatively impacts human health and quality of life. Consequently, the development of sound-absorbing materials for effective noise control has garnered considerable attention. In this study, grain husk/polyurethane (GH/PU) composites were synthesized using a one-step chemical foaming method. Further, the effect of GH addition on their acoustic properties was investigated from a microscopic perspective. An orthogonal test method was then employed to determine the optimal composition of GH/PU (evaluated by the average sound absorption coefficient in 50-6300 Hz), which reached a maximum average value of 0.735. Simultaneously, the mechanical properties and damping properties of GH/PU were characterized: The maximum compression strength and tensile strength are 2.31 kPa and 232 kPa, and the damping loss factor reached a maximum of 0.712 at 10% GH content. Range analysis revealed that the GH addition amount, GH particle size, and foaming agent addition amount were the primary factors influencing the sound absorption performance. Next, a regression model (R2 = 0.8801) was established to assess the impact of these factors on the acoustic properties. Finally, single-factor tests were conducted on the primary control factors to comprehensively examine the potential influence of each factor on the sound absorption performance of GH/PU composites. Overall, the findings of this study offer valuable insights into optimizing the performance of composite acoustic materials and present a novel approach for the effective utilization of agricultural waste.