四乙烯五胺改性分级多孔碳纳米纤维复合膜的CO<sub>2</sub>捕集性能研究

doi:10.11896/cldb.25030011

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Abstract Carbon dioxide (CO₂) capture is pivotal for achieving carbon neutrality goals. This work presents a novel fabrication process for tetraethylenepentamine (TEPA)-functionalized carbon nanofiber (CNFs) composite membranes: hierarchical porous CNFs skeletons were first prepared via solution blow spinning (SBS) combined with gradient carbonization, followed by surface modification using TEPA solution via impregnation to construct CNFs/TEPA composite membranes. Key properties including specific surface area, pore size distribution, and CO₂ adsorption perfor-mance were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) surface area analysis, and thermogravimetric analysis (TGA). Performance tests revealed that the CNFs/TEPA composite membranes effectively integrate TEPA’s chemical adsorption mechanism with the physical adsorption characteristics of CNFs skeletons, exhibiting an adsorption behavior following a "active site enhancement-structural damage loss" competitive model. At an optimal TEPA loading of 10%, the composite membrane achieved a balance between active site density and preserved pore structure (specific surface area and pore diameter), demonstrating a CO₂ adsorption capacity of 2.41 mmol/g at 25 ℃ under atmospheric pressure—approximately 10 times higher than the pristine CNFs skeleton. Additionally, the composite membrane showed excellent selective adsorption capability with a separation factor of 30 and maintained 91% of its initial adsorption capacity after 15 adsorption-desorption cycles, highlighting its promising potential for practical CO₂ capture applications.

Key words： solution blow spinning carbon nanofibers(CNFs) tetraethylenepentamine (TEPA) composite membrane CO₂ adsorption synergistic mechanism

Published: Online: 2026-04-16

CLC number:	TB34
	TB332

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	Articles by authors
	PAN Shuaixing
	WANG Yun
	YANG Kaiwen
	ZHU Changshun
	WU Weiguang
	MENG Hu

Cite this article:

PAN Shuaixing,WANG Yun,YANG Kaiwen, et al. Investigation of CO₂ Capture Performance of Hierarchical Porous Carbon Nanofiber Composite Membranes Modified with TEPA[J]. Materials Reports, 2026, 40(7): 25030011-6.

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https://www.mater-rep.com/EN/10.11896/cldb.25030011 OR https://www.mater-rep.com/EN/Y2026/V40/I7/25030011

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