کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
150265 | 456446 | 2012 | 8 صفحه PDF | دانلود رایگان |
A novel approach, based on electrostatic forces, for coating microparticles with nanoparticles in a continuous manner is presented. Host particles are charged via tribocharging in a fluidized bed, and removed from the bed by entrainment. Using electrospraying, a spray of charged nanoparticles with opposite polarity is generated. Their charge prevents agglomeration while promoting efficient deposition at the surface of the host particle. By contacting a falling curtain of microparticles with the oppositely charged nanoparticles, nanostructured particles are formed. Various process layouts are explored while a proof of concept is demonstrated for continuous production of nanostructured particles.
Figure optionsDownload as PowerPoint slideHighlights
► Novel continuous process of coating microparticles with nanoparticles is developed.
► Electrohydrodynamic atomization is utilized to charge and disperse nanoparticles.
► Microparticles are tribocharged in a fluidized bed.
► Subsequently, they are entrained and coated by the dispersed nanoparticles.
Journal: Chemical Engineering Journal - Volumes 181–182, 1 February 2012, Pages 798–805