Tailoring the properties of micro-particles for industrial applications using dry powder coating
Wirth KE, Linsenbühler M (2004)
Publication Language: English
Publication Type: Conference contribution
Publication year: 2004
Pages Range: -
Conference Proceedings Title: Proceedings International Conference for Particle Technology
Event location: Nürnberg
Abstract
In industry there is a rising demand for fine powders, e.g. for powder coatings or pharmaceutical applications like enhanced dry powder inhalers. However, the processing of fine-grained particles with diameters between 1 and 10 microns is difficult due to strong van-der-Waals attraction forces. With increasing finess of the particles, the van-der-Waals force between the particles increases in comparison to the gravity force. This effect causes the particles to agglomerate or to stick to surfaces. In order to improve the handling properties, the fine-grained particles (host-particles) are coated with various nano-particles (guest-particles). This process can be conducted in various liquids because the attraction forces between the particles are reduced and various effects can be used to tailor the properties of the coated host-particles. By the surface coating both the flow characteristics and other physical properties like solubility and adsorption parameters are changed. The modified properties depend on the coating process and the properties of the host- and guest-particles. By parameter variations the properties of the composite particles, i.e. the coated host-particles, can be systematically adjusted to the requirements of industrial applications. The changed particle-particle interactions can be tested using an atomic force microscope for measuring single-particle forces and both a laboratory bubbling fluidized bed and/or a shear cell to describe the bulk properties. The last mentioned tests describe the silo storage behavior or the conveying behavior of the tailor-made composites, respectively. Changed physical properties can be characterized using both adsorption and solubility tests. The appropriate particle processing and the changed physical properties of the tailor-made particles as well as the methods to characterize the tailor-made functionalized micro-particles are given. The main focus of the presented research is based on the solubility behavior of the tailor-made composite particles.
Authors with CRIS profile
How to cite
APA:
Wirth, K.-E., & Linsenbühler, M. (2004). Tailoring the properties of micro-particles for industrial applications using dry powder coating. In Proceedings International Conference for Particle Technology (pp. -). Nürnberg, DE.
MLA:
Wirth, Karl-Ernst, and Markus Linsenbühler. "Tailoring the properties of micro-particles for industrial applications using dry powder coating." Proceedings of the International Conference for Particle Technology (PARTEC 2004), Nürnberg 2004. -.
BibTeX: Download