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纤维直径、环氧与胺比例及聚乙烯醇皂化度对胺-环氧/聚乙烯醇纳米纤维CO吸附性能的影响

The Effect of the Fiber Diameter, Epoxy-to-Amine Ratio, and Degree of PVA Saponification on CO Adsorption Properties of Amine-Epoxy/PVA Nanofibers.

作者信息

Okada Chisato, Hou Zongzi, Imoto Hiroaki, Naka Kensuke, Kikutani Takeshi, Takasaki Midori

机构信息

Nitto Denko Corporation, Ibaraki 567-8680, Japan.

Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Kyoto 606-8585, Japan.

出版信息

Polymers (Basel). 2025 Jul 18;17(14):1973. doi: 10.3390/polym17141973.

DOI:10.3390/polym17141973
PMID:40732852
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12300401/
Abstract

Achieving carbon neutrality requires not only reducing CO emissions but also capturing atmospheric CO. Direct air capture (DAC) using amine-based adsorbents has emerged as a promising approach. In this study, we developed amine-epoxy/poly(vinyl alcohol) (AE/PVA) nanofibers via electrospinning and in situ thermal polymerization. PVA was incorporated to enhance spinnability, and B-staging of AE enabled fiber formation without inline heating. We systematically investigated the effects of electrospinning parameters, epoxy-to-amine ratios (E/A), and the degree of PVA saponification on CO adsorption performance. Thinner fibers, obtained by adjusting spinning conditions, exhibited faster adsorption kinetics due to increased surface area. Varying the E/A revealed a trade-off between adsorption capacity and low-temperature desorption efficiency, with secondary amines offering a balanced performance. Additionally, highly saponified PVA improved thermal durability by minimizing side reactions with amines. These findings highlight the importance of optimizing fiber morphology, chemical composition, and polymer properties to enhance the performance and stability of AE/PVA nanofibers for DAC applications.

摘要

实现碳中和不仅需要减少二氧化碳排放，还需要捕获大气中的二氧化碳。使用胺基吸附剂的直接空气捕获（DAC）已成为一种有前景的方法。在本研究中，我们通过静电纺丝和原位热聚合制备了胺-环氧/聚乙烯醇（AE/PVA）纳米纤维。引入PVA以提高可纺性，AE的B阶段化使得无需在线加热即可形成纤维。我们系统地研究了静电纺丝参数、环氧与胺的比例（E/A）以及PVA皂化度对二氧化碳吸附性能的影响。通过调整纺丝条件获得的较细纤维由于表面积增加而表现出更快的吸附动力学。改变E/A揭示了吸附容量和低温解吸效率之间的权衡，仲胺表现出平衡的性能。此外，高度皂化的PVA通过最大限度地减少与胺的副反应提高了热耐久性。这些发现突出了优化纤维形态、化学成分和聚合物性能对于提高AE/PVA纳米纤维在DAC应用中的性能和稳定性的重要性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/1c40481de18d/polymers-17-01973-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/7243725489a9/polymers-17-01973-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/69fb5560fd13/polymers-17-01973-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/fbe80bc58bf3/polymers-17-01973-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/8fed890b8c2f/polymers-17-01973-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/32e145618652/polymers-17-01973-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/0f5e975ac4a8/polymers-17-01973-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/105ee66ab949/polymers-17-01973-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/26d099988509/polymers-17-01973-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/1c40481de18d/polymers-17-01973-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/7243725489a9/polymers-17-01973-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/69fb5560fd13/polymers-17-01973-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/fbe80bc58bf3/polymers-17-01973-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/8fed890b8c2f/polymers-17-01973-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/32e145618652/polymers-17-01973-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/0f5e975ac4a8/polymers-17-01973-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/105ee66ab949/polymers-17-01973-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/26d099988509/polymers-17-01973-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29ce/12300401/1c40481de18d/polymers-17-01973-g009.jpg

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本文引用的文献

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In Situ Polymerization Electrospinning of Amine-Epoxy/Poly(vinyl alcohol) Nanofiber Webs for Direct CO Capture from the Air.
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