Electrostatic microencapsulation is a dry coating process where two powders, one containing the fines and the other relatively larger particles, are separately dispersed in air and pre-charged with opposite polarity, using corona charging for electrostatic coagulation. These oppositely charged core and guest particles experience attractive electrostatic forces and generate composite particles. Preliminary experiments of electrostatic microencapsulation were performed using Anionic Exchange Resin (AG 1-X8) as the host particle and Red Toner (Omega 4000) as the guest particles. An electrostatic microencapsulation tower has been designed for generation of composite particles using particles of different particle size distribution.
De, S.; Pritchett, M.; Mazumder, Malay K.; Sims, Robert A.; Yurteri, C. U.; Biris, Alexandru S.; and Rego, A.
"Electrostatic Microencapsulation of Composite Particulate Materials for Manufacturing and Environmental Applications,"
Journal of the Arkansas Academy of Science: Vol. 56
, Article 9.
Available at: http://scholarworks.uark.edu/jaas/vol56/iss1/9