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Tailoring the Micro...
Tailoring the Microstructure of Lamellar Ti3C2Tx MXene Aerogel by Compressive Straining
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- Rawson, Shelley D. (author)
- University of Manchester
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- Bayram, Vildan (author)
- University of Manchester
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- McDonald, Samuel A. (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Yang, Pei (author)
- University of Manchester
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- Courtois, Loic (author)
- 3Dmagination
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- Guo, Yi (author)
- Imperial College London
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- Xu, Jiaqi (author)
- University of Manchester
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- Burnett, Timothy L. (author)
- University of Manchester
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- Barg, Suelen (author)
- University of Augsburg,University of Manchester
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- Withers, Philip J. (author)
- University of Manchester
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(creator_code:org_t)
- 2022-02-08
- 2022
- English 13 s.
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In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 16:2, s. 1896-1908
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Abstract
Subject headings
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- Aerogels are attracting increasing interest due to their functional properties, such as lightweight and high porosity, which make them promising materials for energy storage and advanced composites. Compressive deformation allows the nano- and microstructure of lamellar freeze-cast aerogels to be tailored toward the aforementioned applications, where a 3D nanostructure of closely spaced, aligned sheets is desired. Quantitatively characterizing their microstructural evolution during compression is needed to allow optimization of manufacturing, understand in-service structural changes, and determine how aerogel structure relates to functional properties. Herein we have developed methods to quantitatively analyze lamellar aerogel domains, sheet spacing, and sheet orientation in 3D and to track their evolution as a function of increasing compression through synchrotron phase contrast X-ray microcomputed tomography (μCT). The as-cast domains are predominantly aligned with the freezing direction with random orientation in the orthogonal plane. Generally the sheets rotate toward flat and their spacing narrows progressively with increasing compression with negligible lateral strain (zero Poisson’s ratio). This is with the exception of sheets close to parallel with the loading direction (Z), which maintain their orientation and sheet spacing until ∼60% compression, beyond which they exhibit buckling. These data suggest that a single-domain, fully aligned as-cast aerogel is not necessary to produce a post-compression aligned lamellar structure and indicate how the spacing can be tailored as a function of compressive strain. The analysis methods presented herein are applicable to optimizing freeze-casting process and quantifying lamellar microdomain structures generally.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- architectures
- freeze-casting
- micro domains
- MXenes
- nanomaterial
- time lapse imaging
Publication and Content Type
- art (subject category)
- ref (subject category)
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ACS Nano
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Rawson, Shelley ...
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Bayram, Vildan
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McDonald, Samuel ...
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Yang, Pei
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Courtois, Loic
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Guo, Yi
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show more...
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Xu, Jiaqi
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Burnett, Timothy ...
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Barg, Suelen
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Withers, Philip ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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ACS Nano
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Lund University