The aim of this study is to fabricate nanofibrous membranes with excellent filtration and mechanical properties for application in the field of flue gas purification. Carboxylated Multiwalled carbon nanotubes (MWCNTs-COOH) were used to enhance the performance of PMIA nanofibrous membranes. The results showed that the average particle size D of MWCNTs-COOH in the PMIA electrospining solution was significantly reduced from 644 nm to 361 nm, the stability and dispersibility of MWCNTs-COOH were significantly enhanced. The resultant membranes exhibit a tree-like structure with a bimodal distribution of diameters and interconnected bonding points, where the trunk nanofibers exhibit an average diameter of 134.80 nm, while the branch nanofibers demonstrate an average diameter of 27.19 nm. The MWCNTs-COOH/PMIA nanofibrous membranes exhibited a filtration efficiency of 99.98 % for the most penetrating particle size (MPPS), while maintaining a tensile strength of 46.736 MPa. Notably, they retained significant strength even under harsh conditions, e.g. 56.46 % at 250 °C, 58.26 % with 30 wt% HSO, and 82.71 % with 10 wt% NaOH. The filtration efficiency remained at approximately 88.97 % even at 250 °C. These findings expand PMIA's application to harsh environments and offer insights for designing high-performance filters for high-temperature settings.

中文翻译：

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电纺羧化多壁碳纳米管改性PMIA树状纳米纤维膜，具有优异的热稳定性和耐化学性，可有效去除颗粒物


本研究的目的是制造具有优异过滤和机械性能的纳米纤维膜，用于烟气净化领域。羧化多壁碳纳米管 (MWCNTs-COOH) 用于增强 PMIA 纳米纤维膜的性能。结果表明，PMIA静电纺丝溶液中MWCNTs-COOH的平均粒径D由644nm显着降低至361nm，MWCNTs-COOH的稳定性和分散性显着增强。所得膜呈现出具有双峰直径分布和互连粘合点的树状结构，其中主干纳米纤维的平均直径为134.80nm，而分支纳米纤维的平均直径为27.19nm。 MWCNTs-COOH/PMIA纳米纤维膜对最具穿透力的粒径（MPPS）的过滤效率为99.98%，同时保持46.736MPa的拉伸强度。值得注意的是，即使在恶劣的条件下，例如在恶劣的条件下，它们也能保持显着的强度。 250 °C 时为 56.46%，使用 30wt% HSO 时为 58.26%，使用 10wt% NaOH 时为 82.71%。即使在250℃下过滤效率仍保持在约88.97%。这些发现将 PMIA 的应用扩展到恶劣环境，并为设计用于高温环境的高性能滤波器提供了见解。