Chapter 7 Coating and encapsulation processes in powder technology

Preparation and characterization of TiO2and γ-Al2O3composite membranes for the separation of oil-in-water emulsions

“…26 Sols with larger particle sizes may not form uniformly on the support and mostly create patches on the surface of the support. 27 It can be noticed from Fig. S1 (Supplementary data) that the particle sizes of TiO 2 and Al 2 O 3 sol are in the range of 0.3382-0.4777 µm, and 7.192-16.912 µm, respectively, while the volume median diameter is found to be 0.016225 and 0.001698 µm for TiO 2 and γ-Al 2 O 3 , respectively.…”

Nutrient release characteristics and coating homogeneity of biopolymer coated urea as a function of fluidized bed process variables

“…Lan et al reported a similar finding suggesting that the permeability coefficient rose with greater atomizing air pressure. Nevertheless, moderately high pressures yielded compactly coated granules due to smaller droplet size . A denser overlay considerably resists nutrient release resulting in a relatively lower diffusion coefficient, as verified by diffusion coefficients for all observed centre point runs in which atomized air pressure was neither low nor high (225 kPa (2.25 bar)).…”

“…A denser overlay considerably resists nutrient release resulting in a relatively lower diffusion coefficient, as verified by diffusion coefficients for all observed centre point runs in which atomized air pressure was neither low nor high (225 kPa (2.25 bar)). Saleh et al also reported that the momentum of elevated atomized pressure droplets yielded a homogeneously compacted coating . Lan et al also reported a low permeability coefficient for moderately high atomizing air pressure.…”

Feedback control strategies for a continuous industrial fluidized-bed granulation process

“…In wet granulation, the liquid binder (a solution or dispersion) is distributed on the seeds and, subsequently, the granules are dried to evaporate the solvent. In dry granulation, fine solid particles are added to the agitated seed bed; the powder adherence is promoted by Van der Waals or electrostatic forces [5]. In melt granulation, powders are enlarged by using meltable materials.…”