Elucidating the Bulk Morphology of Cellulose-Based Conducting Aerogels with X-Ray Microtomography [Elektronisk resurs]
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Oikonomou, Vasileios (författare)
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Dreier, Till (författare)
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Sandéhn, Alexandra (författare)
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Mohammadi, Mohsen (författare)
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Christensen, Jakob Lonborg (författare)
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Tybrandt, Klas (författare)
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Dahl, Anders Bjorholm (författare)
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Dahl, Vedrana Andersen (författare)
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Bech, Martin (författare)
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Stavrinidou, Eleni (författare)
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Wallenberg Wood Science Center (medarbetare)
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Wallenberg Wood Science Center (medarbetare)
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Wallenberg Wood Science Center (medarbetare)
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Wallenberg Wood Science Center (medarbetare)
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Wallenberg Wood Science Center (medarbetare)
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Linköpings universitet Institutionen för teknik och naturvetenskap (utgivare)
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Linköpings universitet Tekniska fakulteten (utgivare)
- Publicerad: WILEY, 2023
- Engelska.
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Ingår i: Advanced Materials Technologies. ; 8:23
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- Relaterad länk:
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http://www.liu.se (Värdpublikation)
Sammanfattning
Ämnesord
Stäng
- Conducting cellulose composites are promising sustainable functional materials that have found application in energy devices, sensing and water purification. Herein, conducting aerogels are fabricated based on nanofibrillated cellulose and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, using the ice templating technique, and their bulk morphology is characterized with X-ray microtomography. The freezing method (-20 degrees C in a freezer vs liquid nitrogen) does not impact the mean porosity of the aerogels but the liquid-N2 aerogels have smaller pores. The integration of carbon fibers as addressing electrodes prior to freezing results in increased mean porosity and pore size in the liquid-N2 aerogels signifying that the carbon fibers alter the morphology of the aerogels when the freezing is fast. Spatially resolved porosity and pore size distributions also reveal that the liquid-N2 aerogels are more inhomogeneous. Independent of the freezing method, the aerogels have similar electrochemical properties. For aerogels without carbon fibers, freezer-aerogels have higher compression modulus and are less stable under cycling compression fatigue test. This can be explained by higher porosity with larger pores in the center of liquid-N2 aerogels and thinner pore walls. This work demonstrates that micro-CT is a powerful tool for characterizing the morphology of aerogels in a non-destructive and spatially resolved manner. Conducting aerogels based on nanofibrillated cellulose and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate are fabricated with the ice templating technique and their bulk morphology is characterized in a spatially resolved manner with X-ray microtomography. The effect of the freezing temperature and the integration of carbon fibers electrodes prior to freezing on the morphology, mechanical, and electrochemical properties is examined.
Ämnesord
- Natural Sciences (hsv)
- Chemical Sciences (hsv)
- Materials Chemistry (hsv)
- Naturvetenskap (hsv)
- Kemi (hsv)
- Materialkemi (hsv)
Genre
- government publication (marcgt)
Indexterm och SAB-rubrik
- aerogels; cellulose; poly(3
- 4-ethylenedioxythiophene); X-ray microtomography
Inställningar
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Advanced Materials Technologies