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  4. Spray coating of cellulose aerogel particles in a miniaturized spouted bed
 
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Spray coating of cellulose aerogel particles in a miniaturized spouted bed

Citation Link: https://doi.org/10.15480/882.3813
Publikationstyp
Journal Article
Date Issued
2021-07-04
Sprache
English
Author(s)
Schroeter, Baldur  
Yonkova, Velislava P.  
Goslinska, Monika 
Orth, Maike  orcid-logo
Pietsch-Braune, Swantje  orcid-logo
Gurikov, Pavel  
Smirnova, Irina  orcid-logo
Heinrich, Stefan  
Institut
Thermische Verfahrenstechnik V-8  
Feststoffverfahrenstechnik und Partikeltechnologie V-3  
Entwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2  
TORE-DOI
10.15480/882.3813
TORE-URI
http://hdl.handle.net/11420/10461
Journal
Cellulose  
Volume
28
Issue
12
Start Page
7795
End Page
7812
Citation
Cellulose 28 (12): 7795-7812 (2021-08-01)
Publisher DOI
10.1007/s10570-021-04032-0
Scopus ID
2-s2.0-85109306133
Publisher
Springer Science + Business Media B.V
Aim of this work is to apply protective and homogeneous shellac coating layers on the surface of hydrophilic open-pore cellulose aerogel particles with low densities ≤ 0.1 g/cm3 and high specific surface areas in the range of ~ 400–450 m2/g while keeping the aerogels’ microstructure intact during processing. For this purpose, an innovative miniaturized spouted bed setup was used. Successful process settings for application of enclosed films on aerogel surfaces without intrusion of coating material into the pores were determined. Precise control of coating layer thickness in the range of 10–50 µm was achieved due to variation of coating solution amount without agglomeration and clogging events occurring during processing. Comparison of bulk densities and specific surface areas before and after coating proved the intactness of the porous structure. Coating of particles loaded with vanillin led to controlled release, enhancing release half-life times from 20 to 1600 min. Overall, a successful strategy for coating of organic low-density aerogels was developed.
Subjects
Aerogel
Cellulose
Drug release
Shellac coating
Spouted bed
DDC Class
500: Naturwissenschaften
600: Technik
Funding(s)
Strategieentwicklung zur Beschichtung von offenporigen, nanoporösen Materialien mit geringer Dichte  
Projekt DEAL  
Funding Organisations
Deutsche Forschungsgemeinschaft (DFG)  
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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