Abstract
AbstractAim 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.
Funder
Deutsche Forschungsgemeinschaft
Technische Universität Hamburg
Publisher
Springer Science and Business Media LLC
Reference31 articles.
1. Akgün IS, Erkey C (2019) Investigation of hydrodynamic behavior of alginate aerogel particles in a laboratory scalewurster fluidized bed. Molecules 24(16):1–18. https://doi.org/10.3390/molecules24162915
2. Alnaief M, Antonyuk S, Hentzschel CM, Leopold CS, Heinrich S, Smirnova I (2012) A novel process for coating of silica aerogel microspheres for controlled drug release applications. Microp Mesop Mater 160:167–173. https://doi.org/10.1016/j.micromeso.2012.02.009
3. Antonyuk S, Heinrich S, Smirnova I (2012) Discrete element study of aerogel particle dynamics in a spouted bed apparatus. Chem Eng Technol 35(8):427–1434. https://doi.org/10.1002/ceat.201200083
4. Antonyuk S, Heinrich S, Ershova A (2013) DEM study of fluidized bed dynamics during particle coating in a spouted bed apparatus. In: 10th int conf circ fluid beds fluid technol CFB-10 RP7(1), pp 47–65
5. Antonyuk S, Heinrich S, Gurikov P, Raman S, Smirnova I (2015) Influence of coating and wetting on the mechanical behaviour of highly porous cylindrical aerogel particles. Powder Technol 285:34–43. https://doi.org/10.1016/j.powtec.2015.05.004
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