This paper is a multi-aspect study which has undertaken essential numerical characterizations of not only mechanical and hydraulic properties but also acoustic behaviour of a new bio-based porous epoxy resin obtained by a ‘green’ adapted combination of the cationic photopolymerization and the porogen leaching technique. This new kind of material generally possesses interconnected fillet-edge cubic pores which lead to more complex morphology than in the case of spherical or cylindrical pores. In order to characterize the effective properties of the material, a multiscale approach using the asymptotic homogenization method has been applied. Such a method has induced cell problems whose resolutions have been conducted on the geometrical configuration defined from the experimental data of the samples by using scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). The sound absorption behaviour of a plate made of the studied material has been subsequently characterized by solving a normal incidence acoustic problem with an assumption of rigid impervious backing. The mechanical model has been validated by balancing numerical results of the sound absorption coefficient, reflection coefficient, surface impedance, equivalent dynamic density and equivalent dynamic bulk modulus with corresponding experimental results obtained by conducting the three-microphone impedance tube testing. As a consequence, the mechanical model has been applied to investigate the influence of microstructural characteristics on effective properties and acoustic performance of the material. To the authors’ knowledge, the features of the microstructure obtained from an elaboration process using the porogen leaching technique have rarely been studied in the literature. Four types of ordered pore arrangements together with systematic variations of the porosity and the pore size have been taken under consideration. Based on the results of these investigations, the subtle relation between microstructures and properties has been established. The processing parameters of material elaboration could be adjusted so that the obtained porous material would possess the best sound absorption performance.

本文是一项多方面的研究，不仅对机械性能和水力性能进行了重要的数值表征，而且还对新型生物基多孔环氧树脂进行了声学数值表征，这些新型环氧树脂是通过“绿色”改性的阳离子光聚合和成孔剂浸出获得的技术。这种新型材料通常具有相互连接的圆角边缘立方孔，与球形或圆柱形孔相比，它们导致更复杂的形态。为了表征材料的有效特性，已应用使用渐近均质化方法的多尺度方法。这种方法引起了细胞问题，其问题已经通过使用扫描电子显微镜（SEM）和压汞法（MIP）根据样品的实验数据对几何构型进行了解析。由被研究材料制成的板的吸声性能随后通过在假定刚性不透水背衬的情况下解决法向入射声学问题来表征。通过将吸声系数，反射系数，表面阻抗，等效动态密度和等效动态体积模量的数值结果与通过进行三麦克风阻抗管测试获得的相应实验结果进行平衡，从而验证了力学模型。作为结果，力学模型已被用于研究微观结构特征对材料有效性能和声学性能的影响。据作者所知，文献中很少研究使用成孔剂浸出技术从精细加工过程中获得的微观结构特征。已经考虑了四种类型的有序孔排列以及孔隙率和孔径的系统变化。基于这些研究的结果，已经建立了微观结构与性能之间的微妙关系。可以调节材料加工的工艺参数，以使所获得的多孔材料具有最佳的吸声性能。