Silicone Resin Coating of Micro-Sized Ferrite Particles Using Supercritical Carbon Dioxide.

An environmentally friendly and efficient polymer coating method for micro-sized particles was developed using supercritical CO. Because this method used supercritical CO as the solvent to dissolve the coating material, we avoided environmental pollution from organic solvents, saved the energy required to evaporate/remove organic solvents, realized a uniform coating film on the fine particles, and prevented agglomeration of the coating particles. The solubilities of the five silicone resins used as coating materials were measured using the flow method, and the data were well correlated by Chrastil's equation with an average deviation of 5.