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Verlagslink DOI: 10.3390/ma11081287
Titel: Polysaccharide-based aerogel bead production via jet cutting method
Sprache: English
Autor/Autorin: Preibisch, Imke 
Niemeyer, Philipp 
Yusufoğlu, Yusuf 
Gurikov, Pavel 
Milow, Barbara 
Smirnova, Irina 
Schlagwörter: aerogel;biopolymer;pectin;alginate;chitosan;beads;jet cutting
Erscheinungsdatum: 25-Jul-2018
Verlag: Multidisciplinary Digital Publishing Institute
Quellenangabe: Materials 11 (8): 1287 (2018)
Zeitschrift oder Schriftenreihe: Materials 
Zusammenfassung (deutsch): 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. %.
Zusammenfassung (englisch): 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. %.
URI: http://tubdok.tub.tuhh.de/handle/11420/1738
DOI: 10.15480/882.1735
ISSN: 1996-1944
Sonstige Kennungen: doi: 10.3390/ma11081287
Institut: Thermische Verfahrenstechnik V-8 
Dokumenttyp: (wissenschaftlicher) Artikel
Sponsor / Fördernde Einrichtung: German Research Foundation—DFG and the Hamburg University of Technology (TUHH)
Projekt: project no.: 392323616 
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