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Polysaccharide-based aerogel bead production via jet cutting method
Citation Link: https://doi.org/10.15480/882.1735
Publikationstyp
Journal Article
Date Issued
2018-07-25
Sprache
English
Author(s)
Institut
TORE-DOI
Journal
Volume
11
Start Page
Art.-Nr. 1287
Citation
Materials 11 (8): 1287 (2018)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
The aim of this work is to develop a method to produce spherical biopolymer-based aerogel particles, which is capable for scale-up in the future. Therefore, the jet cutting method is suggested. Amidated pectin, sodium alginate, and chitosan are used as a precursor (a 1–3 wt. % solution) for particle production via jet cutting. Gelation is realized via two methods: the internal setting method (using calcium carbonate particles as cross-linkers and citric and acidic acid for pH adjustment) and the diffusion method (in calcium chloride solutions). Gel particles are subjected to solvent exchange to ethanol and consequent supercritical drying with CO2. Spherical aerogel particles with narrow particle size distributions in the range of 400 to 1500 μm and a specific surface area of around 500 m2/g are produced. Overall, it can be concluded that the jet cutting method is suitable for aerogel particle production, although the shape of the particles is not perfectly spherical in all cases. However, parameter adjustment might lead to even better shaped particles in further work. Moreover, the biopolymer-based aerogel particles synthesized in this study are tested as humidity absorbers in drying units for home appliances, particularly for dishwashers. It has been shown that for several cycles of absorption and desorption of humidity, aerogel particles are stable with an absorption capacity of around 20 wt. %.
Subjects
aerogel
biopolymer
pectin
alginate
chitosan
beads
jet cutting
Open Access Publishing
DDC Class
570: Biowissenschaften, Biologie
600: Technik
620: Ingenieurwissenschaften
660: Technische Chemie
More Funding Information
Deutsche Forschungsgemeinschaft (DFG)
Publication version
publishedVersion
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materials-11-01287.pdf
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