Yang Kaiwen, Wang Yun, Zhu Changshun, Wu Weiguang, Fan Xuefei
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China.
Zhenjiang Sanwei Conveying Equipment Co., Ltd., Zhenjiang 212013, China.
Materials (Basel). 2025 May 15;18(10):2303. doi: 10.3390/ma18102303.
Carbon dioxide (CO) capture is a pivotal technology for achieving the goal of carbon neutrality. This paper proposes a novel process, SBS + SI, which integrates Solution Blow Spinning (SBS) and Solution Impregnation Method (SI), using polyamide 66 (PA66) as the carrier material and high-purity tetraethylenepentamine (TEPA) as the modifier, to fabricate nanofiber adsorption membranes with varying carrier structures and modifier component loadings. The CO adsorption performance and pore structure of the adsorbents were investigated using characterization techniques, such as Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Brunauer-Emmett-Teller (BET) surface area and pore size analysis, and Fourier Transform Infrared Spectroscopy (FT-IR). The results indicate that as the mass fraction of TEPA increases, the pores in the nanofiber membranes gradually decrease, while the CO adsorption capacity significantly increases. The PA66 nanofiber membrane achieves peak CO capture performance (44.7 mg/g at 25 °C) at 15% TEPA loading. Meanwhile, the composite nanofiber membranes also exhibit outstanding CO/N selectivity with a separation factor reaching 28. Thermal regeneration tests at 90 °C confirm the composite's outstanding cyclic stability and regenerability, demonstrating its potential for practical carbon capture applications. These findings suggest that the nanofiber adsorbents prepared by the SBS + SI process have broad application prospects in the field of CO capture.
二氧化碳（CO₂）捕集是实现碳中和目标的一项关键技术。本文提出了一种新颖的工艺，即SBS + SI，该工艺将溶液吹纺（SBS）和溶液浸渍法（SI）相结合，以聚酰胺66（PA66）作为载体材料，高纯度四乙烯五胺（TEPA）作为改性剂，制备具有不同载体结构和改性剂组分负载量的纳米纤维吸附膜。使用扫描电子显微镜（SEM）、热重分析（TGA）、布鲁诺尔-埃米特-泰勒（BET）比表面积和孔径分析以及傅里叶变换红外光谱（FT-IR）等表征技术研究了吸附剂的CO₂吸附性能和孔结构。结果表明，随着TEPA质量分数的增加，纳米纤维膜中的孔隙逐渐减小，而CO₂吸附容量显著增加。在TEPA负载量为15%时，PA66纳米纤维膜实现了峰值CO₂捕集性能（25℃下为44.7 mg/g）。同时，复合纳米纤维膜还表现出出色的CO₂/N₂选择性，分离因子达到28。在90℃下的热再生测试证实了该复合材料具有出色的循环稳定性和再生性，表明其在实际碳捕集应用中的潜力。这些发现表明，通过SBS + SI工艺制备的纳米纤维吸附剂在CO₂捕集领域具有广阔的应用前景。
