Experimental Acoustic Characterization of Silica Nanoparticle-Impregnated Kevlar Fabric

机译：二氧化硅纳米粒子浸渍凯瓦尔织物的实验声学特征

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Kevlar fabric impregnated with silica nanoparticles have been shown to have better specific ballistic performance in comparison to their neat counterparts owing to enhancement in shear rigidity and strength. For multifunctional structural applications using lightweight composites, it is desirable to combine this improved ballistic functionality with acoustic functionality in order to maximize overall performance. In this study, experimental acoustic characterization of neat and silica nanoparticle-impregnated Kevlar (K745) fabric is conducted using normal incidence impedance tube testing. Both normal incidence absorption coefficient and transmission loss are measured using ASTM E1050 and E2611 standards respectively in the 60 to 5500 Hz frequency range. The influence of parameters such as number of layers of neat or treated fabric, spacing between fabric layers and percentage weight addition of nanoparticles is examined. The effect of porosity of Kevlar fabric on its acoustic performance is presented. Several trends in the absorption and transmission loss spectra and their underlying mechanisms are identified for the treated Kevlar samples which could form the basis for developing lightweight acoustic and ballistic barrier composites.

机译：由于剪切刚性和强度的增强，已经证明浸渍有二氧化硅纳米粒子的Kevlar织物具有更好的特异性弹道性能。对于使用轻质复合材料的多功能结构应用，希望将这种改进的弹道功能与声学功能组合，以最大化整体性能。在该研究中，使用正常入射阻抗管测试进行纯净和二氧化硅纳米颗粒浸渍的Kevlar（K745）织物的实验声学表征。使用ASTM E1050和E2611标准分别在60至5500Hz频率范围内测量正常入射吸收系数和透射损耗。诸如整洁或处理织物层数的参数的影响，织物层之间的间隔和纳米颗粒的百分比加入百分比。展示了Kevlar织物孔隙率对其声学性能的影响。用于吸收和传输损失光谱的几种趋势及其潜在机制用于处理的kevlar样品，其可以构成开发轻质声学和弹道屏障复合材料的基础。

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《National Conference on Noise Control Engineering》|2020年|635-648|共14页
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Oluwafemi P. Akinmolayan; James M. Manimala;
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Experimental Acoustic Characterization of Silica Nanoparticle-Impregnated Kevlar Fabric

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