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The processing of fine-grained particles with diameters between 1 and 10 microns is difficult due to strong van-der-Waals attraction forces. In order to improve the handling properties, the fine-grained particles, i.e. host-particles, are coated with various nanoparticles, i.e. guest-particles. The mixing of fine-grained powders is influenced by particle-particle interactions. If these forces are distinctively used, both interactive and ordered mixtures can be produced. These particle mixtures consist of composite-particles that have new physical properties. These modified properties depend strongly on the coating process, the diameter- and mass-relationship of the guest- and the host-particles. The properties of the composite-particles can systematically be adjusted to the requirements of industrial applications. For example, a laboratory bubbling fluidized bed can be used to describe the conveying behavior of the functionalized host-particles. Applications for the functionalized particles are in the pharmaceutical and the powder coating industries, e.g. enhanced dry powder inhalers and thin lacquer films. The present research compares three different mixing/coating processes. The composite-particles are characterized by TEM, SEM and with their fluidization characteristics. The coating process itself is monitored by the electrostatic charge of the particles.
The processing of fine-grained particles with diameters between 1 and 10 microns is difficult due to strong van-der-Waals attraction forces. The order is improve the handling properties, the fine-grained particles, ie host-particles, are coated with various nanoparticles, ie guest-particles. The mixing of fine-grained powders is influenced by particle-particle interactions. These particles are distinctively used, both interactive and ordered mixtures can be produced. These particles of composite-particles that have new physical properties. These properties rely on the coating process, the diameter- and mass-relationship of the guest- and the host-particles. The properties of the composite-particles can systematically be adjusted to the requirements of industrial applications. For example, a laboratory bubbling fluidized bed can be used to describe the conveying behavior of the functionalized host-particles. Applications for the functionalized part The composite-particles are characterized by TEM, SEM and with their fluidization characteristics. The coating is in the pharmaceutical and the powder coating industries, eg enhanced dry powder inhalers and thin lacquer films. process itself is monitored by the electrostatic charge of the particles.