This study aims at investigating the thermal, acoustic, and dielectric behavior of a class of epoxy-based hybrid composite incorporated with, short human hair fibers (SHF), and solid glass microspheres (SGM). Epoxy composites filled with 10 wt% of SGM are prepared by solution casting method with different loadings (0, 5, 10, 15, 20 wt%) of SHF. Thermal properties of these composites such as thermal conductivity (K), coefficient of thermal expansion (CTE), and glass transition temperature (T_g) are evaluated by conducting tests as per appropriate ASTM standards. An impedance tube tester and a HIOKI-3532-50 Hi Tester Elsier Analyzer are used for measuring the sound absorption coefficient and dielectric constant of the composite samples, respectively. A theoretical model has been developed to predict the effective thermal conductivity of the hybrid composite considering minimal thermal contact resistance. Based on this model, a mathematical correlation between the effective thermal conductivity of the composite and the filler content is proposed. The results obtained from this correlation are found to be in good agreement with the experimental data. It is observed that with the increase in fiber content the thermal and acoustic insulation behavior of the hybrid composite has been significantly improved. The dielectric characteristics of the composites are also found to be substantially affected by the fiber content and operating frequency.

这项研究的目的是研究掺入短人类头发纤维（SHF）和固体玻璃微球（SGM）的一类基于环氧树脂的混合复合材料的热，声和介电性能。通过溶液浇铸法以不同的SHF负载量（0、5、10、15、20 wt％）制备填充有10 wt％SGM的环氧树脂复合材料。这些复合材料的热性能，例如热导率（K），热膨胀系数（CTE）和玻璃化转变温度（T _g）通过根据适当的ASTM标准进行测试进行评估。阻抗管测试仪和HIOKI-3532-50 Hi Tester Elsier分析仪分别用于测量复合样品的吸声系数和介电常数。已经开发出理论模型，以在考虑最小热接触电阻的情况下预测杂化复合材料的有效导热率。基于该模型，提出了复合材料的有效导热系数与填料含量之间的数学关系。从这种相关性获得的结果被发现与实验数据非常吻合。可以看出，随着纤维含量的增加，杂化复合材料的隔热和隔音性能得到了显着改善。