Design of Highly Efficient Nanomembranes Toward Direct Air Capture. Essential Role of Nanolayer Interface

IF 4.4 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Interfaces Pub Date : 2025-07-31 DOI:10.1002/admi.202500244

Miho Ariyoshi, Shigenori Fujikawa, Toyoki Kunitake

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Abstract

The role of membrane technology is growing in mitigation of global warming via direct capture of CO₂ from the atmosphere (DAC). Yet achieving both high permeability and selectivity remains challenging. In this study, the development of free-standing, nanometer-thick membranes is presented that are composed of layers of poly(dimethylsiloxane) (PDMS) and poly(ethylene glycol) (PEG). These nanomembranes are prepared by sequential spin coating of the precursor polymer solution and the subsequent radical cross-linking. Addition of carbon nanotube or cellulose nanofiber enhanced physical stability of the nanomembrane. One of those nanomembranes exhibited record-breaking CO₂ permeability (>10 000 GPU) and CO₂/N₂ selectivity (>50) at ambient conditions. This gas permeation is a kinetic process, and interface- controlled. This study offers a new design paradigm for highly efficient CO₂ separation.

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用于直接空气捕获的高效纳米膜的设计。纳米层界面的重要作用

膜技术通过从大气中直接捕获二氧化碳（DAC），在减缓全球变暖方面的作用越来越大。然而，同时实现高渗透率和高选择性仍然具有挑战性。在这项研究中，提出了由聚二甲基硅氧烷（PDMS）和聚乙二醇（PEG）层组成的独立的纳米厚膜的发展。这些纳米膜是通过前驱体聚合物溶液的连续自旋涂覆和随后的自由基交联制备的。碳纳米管或纤维素纳米纤维的加入增强了纳米膜的物理稳定性。其中一种纳米膜在环境条件下表现出破纪录的CO2渗透率（> 10000 GPU）和CO2/N2选择性（>50）。这种气体渗透是一个动力学过程，是界面控制的。该研究为高效分离CO2提供了一种新的设计范式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.40

自引率

5.60%

发文量

1174

审稿时长

1.3 months

期刊介绍： Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.