Polyethersulfone (PES) nanocomposite membranes are some of the emerging ultrafiltration technologies that have promising applications in gas separation and wastewater treatment due to their unique microporous structure and cheapness. However, the effect of nanofiller additives on their mechanical and viscoelastic properties is still missing and these fundamentals should be known to designers and manufacturers for potential upscaling. In this context, this research aims to study the uniaxial mechanical behaviors of PES membranes and their nanocomposites (CNTs/PES and Graphene/PES), and then to model their mechanical characteristics based on the results of mechanical experiments. In order to achieve that, four batches from CNTs/PES and Graphene/PES nanocomposite membranes with different concentrations of nanofillers (0.01-0.04 wt.%) were prepared using a solution casting method and a tape casting process. Also, another neat PES batch was prepared for comparison. The pore topology of the synthesized membranes was observed using SEM. Afterwards, the mechanical tensile specimens were cut from the synthesized membranes and tested according to standard ASTM 638M-3 using a uniaxial universal testing machine. Finally, a nonlinear uniaxial stress-strain model was built to simulate the mechanical performance of the fabricated membranes using the generalized Maxwell model. The results showed that the mechanical properties of the membranes were reduced significantly by additives (up to 26% for CNTs and 57% for GA compared with neat batch) because of the changes in the pore topology (orientation, size, and distribution) of the prepared membranes,whereas the modeling results showed that the constitutive model is valid for deducing the uniaxial stress-strain curves of PES membrane and its nanocomposites membranes with a high predictability and average deviation estimated at 0.715% (PES), 0.302% for CNTs/PES and 0.164% for GA/PES membranes.

聚醚砜 (PES) 纳米复合膜是一些新兴的超滤技术，由于其独特的微孔结构和价格低廉，在气体分离和废水处理中具有广阔的应用前景。然而，纳米填料添加剂对其机械和粘弹性性能的影响仍然缺失，设计人员和制造商应该了解这些基本原理以进行潜在的升级。在此背景下，本研究旨在研究 PES 膜及其纳米复合材料（CNT/PES 和石墨烯/PES）的单轴力学行为，然后根据力学实验结果对其力学特性进行建模。为了实现这一目标，来自 CNTs/PES 和石墨烯/PES 纳米复合膜的四批具有不同浓度的纳米填料（0.01-0.04 wt. %) 使用溶液浇铸法和流延法制备。此外，还准备了另一批纯 PES 用于比较。使用 SEM 观察合成膜的孔拓扑结构。然后，从合成膜上切下机械拉伸试样，并根据标准 ASTM 638M-3 使用单轴万能试验机进行测试。最后，建立了非线性单轴应力应变模型，以使用广义麦克斯韦模型模拟制造的膜的机械性能。结果表明，由于膜的孔拓扑结构（方向、大小和分布）发生了变化，添加剂显着降低了膜的机械性能（与纯批次相比，CNT 最多 26%，GA 最多 57%）。准备好的膜，