Shaping 90 wt% NanoMOFs into Robust Multifunctional Aerogels Using Tailored Bio‐Based Nanofibrils

材料科学 碳化 气凝胶 多孔性 纳米技术 复合材料 扫描电子显微镜
作者
Jowan Rostami,Tobias Benselfelt,Lorenza Maddalena,Civan Avcı,Farhiya Alex Sellman,Göksu Cinar Ciftci,Per Tomas Larsson,Federico Carosio,Farid Akhtar,Weiqian Tian,Lars Wågberg
出处
期刊:Advanced Materials [Wiley]
卷期号:34 (38) 被引量:27
标识
DOI:10.1002/adma.202204800
摘要

Metal-organic frameworks (MOFs) are hybrid porous crystalline networks with tunable chemical and structural properties. However, their excellent potential is limited in practical applications by their hard-to-shape powder form, making it challenging to assemble MOFs into macroscopic composites with mechanical integrity. While a binder matrix enables hybrid materials, such materials have a limited MOF content and thus limited functionality. To overcome this challenge, nanoMOFs are combined with tailored same-charge high-aspect-ratio cellulose nanofibrils (CNFs) to manufacture robust, wet-stable, and multifunctional MOF-based aerogels with 90 wt% nanoMOF loading. The porous aerogel architectures show excellent potential for practical applications such as efficient water purification, CO2 and CH4 gas adsorption and separation, and fire-safe insulation. Moreover, a one-step carbonization process enables these aerogels as effective structural energy-storage electrodes. This work exhibits the unique ability of high-aspect-ratio CNFs to bind large amounts of nanoMOFs in structured materials with outstanding mechanical integrity-a quality that is preserved even after carbonization. The demonstrated process is simple and fully discloses the intrinsic potential of the nanoMOFs, resulting in synergetic properties not found in the components alone, thus paving the way for MOFs in macroscopic multifunctional composites.
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